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1
Limprasert, Tawan. "Behavior of soil, soil-cement, and soil-cement-fiber under multiaxial test." Ohio : Ohio University, 1995. http://www.ohiolink.edu/etd/view.cgi?ohiou1179260769.
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Limprasert, Tawan. "Behaviour of soil, soil-cement and soil-cement-fiber under multiaxial test." Ohio University / OhioLINK, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1179260769.
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Zhang, Guanghui, and 張廣輝. "Soil-water characteristics of sandy soil and soil cement with and without vegetation." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/208025.
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The use of soil cement as a growth medium was examined in this study. During the monitoring, green soil cement revealed diverse ecological values. The survival rates of plants in each soil conditions were higher than 80%,which was very promising. Furthermore, the survival rates dropped when the soil density reached95%, which means soil density might influence the survival rate of plant. Plant growth rates in sandy soil were higher than that in soil cement. In particular, low soil density facilitated plant growth in sandy soil, whereas density effect was not clear to plant growth performance in soil cement.
Experiments were undertaken to study the soil-water characteristics of sandy soil and soil cement in field and laboratory condition. The influence of vegetation and material density on the development of negative pore water pressure (PWP) and degree of saturation (Sr) in the studied materials was investigated. The field planting experiments proved a promising survival rate of Schefflera heptaphylla in both types of materials while sandy soil promoted better growth of the seedlings than the soil cement. From the field study, PWP and Sr of sandy soil responded noticeably and promptly to natural drying and wetting cycles. However, the responses in soil cement were relatively mild. When subjected to the same drying-wetting cycles, PWP responded more slowly and to a smaller magnitude compared with that of soil cement. In addition, Sr changed little in soil cement. An increase in the density of the sandy soil promoted rapid development of negative PWP, while an opposite trend was observed for soil cement. Attempts have been made to explain the observations from the perspectives of material permeability and change in water content during a drying period in both soil types. Furthermore, in sandy soil, the development of PWP (with a measurement limit of -90 kPa) was minimally affected by the presence of vegetation, while vegetation noticeably helped the development of negative PWP in the soil cement. Bounds of the soil-water characteristic curve of the studied materials were presented based on estimates from the drying and wetting scanning curves derived from the field monitoring. A complementary laboratory study was carried out in an environmental chamber with controllable temperature and humidity. Monitoring results from the laboratory agreed well with that obtained from the field.published_or_final_version
Civil Engineering
Master
Master of Philosophy
4
Sariosseiri, Farid. "Critical state framework for interpretation of geotechnical properties of cement treated soils." Online access for everyone, 2008. http://www.dissertations.wsu.edu/Dissertations/Summer2008/f_sariosseiri_070208.pdf.
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Rafalko, Susan Dennise. "Rapid Soil Stabilization of Soft Clay Soils for Contingency Airfields." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/35985.
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Since World War II, the military has sought methods for rapid stabilization of weak soils for support of its missions worldwide. Over the past 60 years, cement and lime have consistently been found to be among the most effective stabilizers for road and airfield applications, although recent developments show promise using nontraditional stabilizers. The purpose of this research is to determine the most effective stabilizers and dosage rates of stabilizers to increase the strength of soft clay soils (initial CBR = 2) within 72 hours for contingency airfields to support C-17 and C-130 aircraft traffic. Pavement design charts for various aircraft loading conditions were generated using the Pavement-Transportation Computer Assisted Structural Engineering Program, which was developed by the Engineering Research and Development Center to determine ranges of required strength and thickness for an underlying subbase layer and a top base layer, such as stabilized soil, crushed-aggregate, or aluminum matting. From laboratory studies, the required design strengths for many loading conditions were achieved by treating clay with 2%-4% pelletized quicklime for the underlying subbase layer, and treating clay with 2%-4% pelletized quicklime, 1% RSC15 fibers, and 11% Type III cement for the top base layer. While the base layer requires a minimum thickness of six inches, the required subbase layer thickness is often quite large and may be difficult to construct. However, newly developed construction equipment currently used for subgrade stabilization on civilian projects should be able to stabilize the soil down to these large required depths and make construction possible.Master of Science
6
Crockford, William W. "Tensile fracture and fatigue of cement stabilized soil." Full text available, 1986. http://images.lib.monash.edu.au/ts/theses/crockford.pdf.
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Reely, Blaine Theodore. "EFFECTS OF FLYASH CONTENT ON STRENGTH AND DURABILITY CHARACTERISTICS OF PANTANO SOIL-CEMENT MIXES." Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/275428.
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Khosravi, Mohammad. "Seismic Response of Structures on Shallow Foundations over Soft Clay Reinforced by Soil-Cement Grids." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/72978.
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This study uses dynamic centrifuge tests and three-dimensional (3D), nonlinear finite-difference analyses to: (1) evaluate the effect of soil-cement grid reinforcement on the seismic response of a deep soft soil profile, and (2) to examine the dynamic response of structures supported by shallow foundations on soft clay reinforced by soil-cement grids. The soil profile consisted of a 23-m-thick layer of lightly over-consolidated clay, underlain and overlain by thin layers of dense sand. Centrifuge models had two separate zones for a total of four different configurations: a zone without reinforcement, a zone with a "embedded" soil-cement grid which penetrated the lower dense sand layer and had a unit cell area replacement ratio Ar = 24%, a zone with an embedded grid with Ar = 33%, and a zone with a "floating" grid in the upper half of the clay layer with Ar = 33%. Models were subjected to a series of shaking events with peak base accelerations ranging from 0.005 to 0.54g. The results of centrifuge tests indicated that the soil-cement grid significantly stiffened the site compared to the site with no reinforcement, resulting in stronger accelerations at the ground surface for the input motions used in this study. The response of soil-cement grid reinforced soft soil depends on the area replacement ratio, depth of improvement and ground motion characteristics. The recorded responses of the structures and reinforced soil profiles were used to define the dynamic moment-rotation-settlement responses of the shallow foundations across the range of imposed shaking intensities. The results from centrifuge tests indicated that the soil-cement grids were effective at controlling foundation settlements for most cases; onset of more significant foundation settlements did develop for the weakest soil-cement grid configuration under the stronger shaking intensities which produced a rocking response of the structure and caused extensive crushing of the soil-cement near the edges of the shallow foundations. Results from dynamic centrifuge tests and numerical simulations were used to develop alternative analysis methods for predicting the demands imposed on the soil-cement grids by the inertial loads from the overlying structures and the kinematic loading from the soil profile's dynamic response.Ph. D.
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Castro, Gonzales Milagros Alessandra, and Pereyra Jesus David Navarro. "Propuesta de mejora de suelos arcillosos de alta plasticidad a nivel de subrasante mediante la adición de cemento Portland para disminuir el cambio volumétrico provocado por las condiciones climáticas en la Av. Padre salas, Villa Rica, Oxapampa, Pasco." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2020. http://hdl.handle.net/10757/652573.
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Esta investigación comprende la caracterización del suelo que conforma la subrasante de la Av. Padre Salas, Villa Rica, Pasco, el potencial de resistencia y la expansión que presenta el suelo en el sector indicado, la evaluación es realizada mediante ensayos CBR. Se utiliza la técnica de suelo cemento para mejorar las características físicas y mecánicas, este proceso consiste en mezclar al material con cemento Portland Tipo I formando suelo cemento 10%, 15% y 20%, los cuales presentan un incremento del CBR (máximo: 138.7% y mínimo: 91.9%) logrando un tipo de subrasante extraordinaria para resistir la estructura del pavimento y una reducción de 7.18% en la expansión de las muestras.This study includes found the properties of the soil, which forms Av. Padre Salas, Villa Rica, Pasco subgrade, strength potential and expansion that soil presents at the indicated sector, the evaluation is executed through CBR tests. Soil cement technique is use in order to improve the physical and mechanical characteristics; this process is to combine the material with Ordinary Portland cement making soil cement 10%. 15% y 20%, which have a CBR increase (max: 138.7% and min: 91.9%) achieving an extraordinary subgrade type so as to bear up the pavement structure and an expansion reduction of 7.18% in specimens.
Tesis
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Montgomery, David Edward. "Dynamically-compacted cement stabilised soil blocks for low-cost walling." Thesis, University of Warwick, 2002. http://wrap.warwick.ac.uk/2836/.
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This document contains the detailed results and conclusions of work carried out during a PhD to investigate the processing, production and performance of dynamically compacted cement-stabilised soil blocks suitable for sustainable low-cost building. An earlier project carried out by the author demonstrated that full-size blocks could be manufactured by dynamic compaction. It was hoped that this technique could be applied to the self-evident need for low-cost housing in the humid tropics. The apparent advantages of this process, over quasi-static compression (slow steady squeezing), have led to further investigation into the critical factors influencing the production of such building units. Initial tests on small cylindrical samples produced by both quasi-static compression and dynamic compaction provided a means of comparison and helped to develop relationships between dominant variables. These tests showed that the moisture content of the compact was a critical variable, influencing its consolidation and its final cured strength. Optimisation studies were undertaken to determine acceptable parameters for impactor mass, drop height and number of applied blows. These chosen parameters were then extrapolated to full-size block production with the necessary adjustments for practicality and cost. Full-size block production using the Test Rig indicated similar relationships as those discovered at the smaller scale, including the more effective consolidation offered by dynamic compaction. From this experience a production prototype was designed and disseminated to a collaborator in India for further trials and feasibility studies. These trials demonstrated that dynamic compaction could produce blocks with a 7-day wet compressive strength of between 3-5MPa with only 5% cement, (typical building regulations require block strength greater than 3.5MPa after 28-days). Feasibility studies there indicate dynamic compaction offers potential savings of 40% compared with local high-tech CSSB manufacture.
11
Gooding, Dominic Edward Maxwell. "Improved processes for the production of soil-cement building blocks." Thesis, University of Warwick, 1994. http://wrap.warwick.ac.uk/4453/.
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Stabilised-soil cement building blocks are an established building material in many areas of the Less Developed World. This thesis has been split into three parts. Part A presented an overview of the process of soil-stabilisation and outlined the roles which soil structure and curing play in stabilisation. It examined methods of testing soils, highlighting errors presented in the published literature and presenting corrected testing procedures and unified plans for their implementation. Part B examined the conventional quasi-static block compaction process (slowly applied pressure) and established that no cost-effective increase in the compacted block density can be achieved by altering such moulding configurations as mould-wall roughness, mould-wall taper, number of applied pressure cycles and double-sided pressure application. The tests were also used to assess the plausibility of several theoretical mechanisms underlying quasi -static compaction. Cement may be traded against compaction pressure for a given final cured strength. The relation of compaction pressure and cement content to well-cured strength was established for 50 mm diameter cylinders and used to assess the financial benefit of high-pressure compaction. It was shown that savings in the cost of cement associated with high-pressure compaction were outweighed by the additional cost of such machinery. However there were additional benefits found to high-density compaction, beyond the saving in stabiliser costs. It was established that a highdensity moulding machine in the range £1000 - £1500 would allow these benefits to become cost competitive. Part C examined both experimentally and theoretically an alternative dynamic (impact blow) compaction process, establishing that optimised dynamic compaction may produce strength equivalent to quasi-static high-density moulding while requiring only 25-50 % of the energy. Five theoretical models of the process were developed and the Combined Airlock/Friction/Compression Wave Model was shown to have the most explanatory power.
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Jameson, Robert N. J. (Robert Nicholas James). "Mechanical properties of soil cement and applications in excavation support." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/10658.
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Jonsson, Carl. "Deep stabilization with Cement Columns : A Laboratory Studie." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-62252.
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Al-Ghanem, Abdulhakim M. F. "Factors affecting the strength characteristics of calcium-carbonate - cemented soils." Diss., The University of Arizona, 1989. http://hdl.handle.net/10150/184645.
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The factors which affect the engineering properties of calcium carbonate cemented soil are examined. The influence of calcium carbonate content, molding moisture content, and confining pressure on the strength characteristics of two types of soil is investigated in two distinct phases of the research. Type A soil, obtained from the University of Arizona Campbell Avenue Farm in Tucson, was used for the artificially cemented specimen stage. It is composed of sand and silt-size particles with some clay and is virtually free of calcium carbonate in its natural state. Sierrita soil, obtained from the Twin Buttes Open Pit Mine south of Tucson, was used for the reconstituted sample stage. It is naturally cemented with calcium carbonate and is composed mainly of sand, gravel, a small amount of silt, and occasional large-sized (boulder and cobble) particles. Specimens for triaxial compression testing were compacted for each phase of the study under carefully controlled conditions. Three test series were carried out on Type A soil artificially cemented with calcium carbonate. Three percentages (0%, 15%, and 30%) on a dry weight basis of the soil were used. Two molding water contents, one dry and one wet of optimum moisture content, were established for each test series. Unconsolidated undrained triaxial compression tests were carried out on oven-dried specimens at three different confining pressures to obtain shear strength parameters. The fabric characteristics of selected specimens were then defined by viewing them under a scanning electron microscope. The results indicate that the strength of the calcium carbonate cemented soil depends on the distribution and not necessarily the content of the cementing agent within the soil mass. Visual examination of the various microstructures of the artificially cemented soil confirmed the hypothesis that strength gain occurs when the calcium carbonate particles are concentrated at the points of contact between soil grains. Visual examination of the fabric of the naturally cemented Sierrita soil showed the microstructure to be highly compressed with weathered calcium carbonate particles dominating the soil structure. The calcium carbonate content was found to range from 14 to 23%. Because of sampling difficulties, an in situ cohesion value for the Sierrita soil could not be obtained from conventional laboratory tests. Therefore, the value was obtained by back analysis of the stability of actual slopes existing at Twin Buttes Mine. Slope stability analyses using Bishop's Modified Method with a search routine based on the Simplex Method of Nelder and Mead were performed. Stability analyses were also performed using strength properties of artificially cemented Type A soil. These analyses showed the relationships among cohesion, friction angle, safety factor, and calcium carbonate content for a specified slope geometry.
15
McKinley, John David. "Grouted ground anchors and the soil mechanics aspects of cement grouting." Thesis, University of Cambridge, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.483424.
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Khair, A. "Soil-cement tiles for lining small irrigation canals in developing countries." Thesis, University of Newcastle upon Tyne, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.380763.
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Yoldas, Cenk. "A prototypical (school) design strategy for soil-cement construction in Afghanistan." Kansas State University, 2004. http://hdl.handle.net/2097/36088.
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Michener, John E. "Effects of Environmental Factors on Construction of Soil-Cement Pavement Layers." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2630.pdf.
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Gebretsadik, Alex Gezahegn. "Shear Resistance Degradation of Lime –Cement Stabilized Soil During Cyclic Loading." Thesis, KTH, Jord- och bergmekanik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-141196.
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This thesis presents the results of a series of undrained cyclic triaxial tests carried out on four lime-cement stabilized specimens and clay specimen. The shear resistance degradation rate of lime-cement column subjected to cyclic loading simulated from heavy truck was investigated based on stress-controlled test. The influence of lime and cement on the degradation rate was investigated by comparing the behavior of stabilized kaolin and unstabilized kaolin with similar initial condition. The results indicate an increase in degree of degradation as the number of loading cycles and cyclic strain increase. It is observed that the degradation index has approximately a parabolic relationship with the number of cycles. Generally adding lime and cement to the clay will increase the degradation index which means lower degree of degradation. The degradation parameter, t has a hyperbolic relationship with shear strain, but it loses its hyperbolic shape as the soil getting stronger. On the other hand, for unstabilized clay an approximate linear relationship between degradation index and number of cycles was observed and the degradation parameter has a hyperbolic shape with the increase number of cycles. It was also observed that the stronger the material was, the lesser pore pressure developed in the lime-cement stabilized clay.
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Milstone, Barry Scott. "Effects of nonhomogeneous cementation in soils on resistance to earthquake effects." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/77896.
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Small amounts of cementation in a sand increase its ability to sustain static and dynamic loads, even in a liquefaction type environment. This has been shown in previous research examining the behavior of both naturally cemented and artificially prepared samples.
Cemented sands are present in many parts of the world and can be caused by either a variety of cementing agents or by cold welding at points of grain contact. They are generally quite difficult to sample, but artificially cemented sands have been shown to aptly model the behavior of natural materials, and allow for better test controls. Consequently, artificial samples were used exclusively for the present investigation which has three major objectives: to investigate the effects of a weakly cemented lens within a stronger mass; to determine how cementation affects the volume change characteristics of statically loaded samples; and, to describe the pore pressure generation of sands subjected to cyclic loading.
Prior to commencing the test program, a number of index tests were performed on the uncemented and cemented sand used during the laboratory investigation. It was revealed that cementation leads to increased void ratios which distort relative density calculations used to compare cemented and uncemented samples of similar dry unit weight. The practice of identifying samples by dry unit weight was adopted for this report.
Static triaxial compression tests were performed on 17 samples. Test results indicate that although the magnitude of volumetric strain at failure does not seem to be dictated by the level of cementation, there is a relationship with cementation and the rate of volume change at failure. A weak lens was seen to lower the static strength of the stronger mass. 26 stress controlled cyclic triaxial tests revealed that a weak lens lowers the liquefaction resistance of the stronger mass. The cyclic strength of the nonhomogeneous material, however, is higher than the independent strength of the weak lens. A weak lens has greater influence at relatively higher levels of cyclic stress. Pore pressure generation in cemented sands are seen to be controlled by strain. At shear strain levels below about 1%, cemented sands behave similarly to uncemented sands with pore pressures increasing more rapidly beyond that amount of strain. Consequently, pore pressure development during cyclic loading is described by a broken-back curve which is defined in the early stages by existing empirical relationships for uncemented sand. Pore pressure prediction may then be achieved using an equation for cemented sand, such as that developed in the present work.Master of Science
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Bhuiyan, M. A. S. "The mechanical behaviour of stabilised soils." Thesis, University of Newcastle Upon Tyne, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382836.
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Wang, Ouge. "Data mining, mapping and modelling of the strength of cement-stabilised soils." Thesis, University of Cambridge, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.648530.
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Young, Tyler B. "Early Age Assessment of Cement Treated Materials." BYU ScholarsArchive, 2007. https://scholarsarchive.byu.edu/etd/885.
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In order to avoid the occurrence of early-age damage, cement-treated base (CTB) materials must be allowed to cure for a period of time before the pavement can be opened to traffic. The purpose of this research was to evaluate the utility of the soil stiffness gauge (SSG), heavy Clegg impact soil tester (CIST), portable falling-weight deflectometer (PFWD), dynamic cone penetrometer, and falling-weight deflectometer for assessing early-age strength gain of cement-stabilized materials. Experimentation was performed at four sites on a pavement reconstruction project along Interstate 84 near Morgan, Utah, and three sites along Highway 91 near Richmond, Utah; cement stabilization was used to construct CTB layers at both locations. Each site was stationed to facilitate repeated measurements at the same locations with different devices and at different curing times. Because of the considerable attention they have received in the pavement construction industry for routine quality control and quality assurance programs, the SSG, CIST, and PFWD were the primary focus of the research. Statistical techniques were utilized to evaluate the sensitivity to curing time, repeatability, and efficiency of these devices. In addition, the ruggedness and ease of use of each device were evaluated. The test results indicate that the CIST data were more sensitive to curing time than the SSG and PFWD data at the majority of the cement-treated sites during the first 72 hours after construction. Furthermore, the results indicate that the CIST is superior to the other instruments with respect to repeatability, efficiency, ruggedness, and ease of use. Because the CIST is less expensive than the SSG and PFWD, it is more likely to be purchased by pavement engineers and contractors involved with construction of CTBs. For these reasons, this research suggests that the CIST offers greater overall utility than the SSG or PFWD for monitoring early-age strength gain of CTB. Further research is needed to identify appropriate threshold CIST values at which CTB layers develop sufficient strength to resist permanent deformation or marring under different types of trafficking.
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Rasol, Mezgeen Abdulrahman Rasol. "Development of new GPR methodologies for soil and cement concrete pavement assessment." Doctoral thesis, Universitat Politècnica de Catalunya, 2021. http://hdl.handle.net/10803/671504.
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The study of surface geology by means of Ground Penetrating Radar (GPR) can provide information about abrupt lateral changes in the terrain. The location ofthese changes is very useful in seismic nanozonation studies, since it allows determining a priori the sectors in which the meas ures should be intensified . The thesis analyzes the effect of changes in granulometry and com paction in the subsurface radar records . lt is observed that a greater heterogeneity of the terrain produces an increase in the background noise ofthe signa! (clutter) dueto the backscattering ofthe waves. The analysis of the amplitude ofthe incoherent signa!, determined in each A-sean by means ofthe average value obtained in a certain time window, makes it possible to obtain graphs ofthe amplitude ofthe background noise versus the position ofthe trace in the profile . The results clearlydefine the sectors in which the amplitude value increases, associating them with the existence of heterogeneous materiaIs in the most superficial zone of the subsoil. On the other hand, the analysis of the frequency content ofthe received radar signa! shows abrupt changes that are sometimes related to the increase in the clutter amplitude.
However, at other times they do not appear , even though there is an increase in noise. To analyze the effect, a seasonal study was carried out in an area eros sed by underground streams , comparing the results in the dry season with the results in the rainy season . In temporal space, the underground streams could be detected thanks to the increase in clutter. The results were compared with those obtained by passive seismic . In the frequency space, greater changes in frequencywere observed in the rainy season, while in the dry season these changes only appeared in the records obtained in the area where there was one of the streams. lt was concluded, therefore, that the study of the amplitude s pectrum could be used to determine the presence ofwater and, in the case ofstreams, to differentiate between active streams and drychannels. These results are of great interest for the planning of trans port infrastructures.
In the second part ofthe thesis, damage to transport infrastructure is analyzed. Specifically, on rigid pavements. Often these pavements built by using reinforced concrete slabs, are covered by an asphalt layer, either by design or dueto periodical restorations. The interna! cracks that are generated are not observed on the surface until very advanced stages. Severa! laboratory experiments and field case studies were proposed to determine the ability of the GPR to locate cracks, studying the effect ofthickness, depth and fill material. lt was observed that cracks of a size that allow them to be considered as incipient can be detected, although the length ofthe vertical crack could only be detected in the case of cracks already in an advanced state of damage (of great width) or filled with saturated sand or water. The decrease in the speed ofthe signal due to the presence ofwater allowed a higher resolution. The experimental results were compared and verified with field case studies, on real roads. Similar effects were observed although with a more limited resolution. Us ing com putational methods, the anomalies recorded in the radargrams were related and verified in most ofthe cases, both experimentally and in field studies, with different types of cracks.El estudio de la geologia superficial mediante georradar puede proporcionar información acerca de cambios laterales abruptos en el terreno. La localización de estos cambios resulta especialmente útil en los estudios de nanozonificación sísmica, ya que permite determinar a priori los sectores en los que se deben intensificar las medidas. En la tesis se analiza el efecto de los cambios de granulometría yde compactación en los registros de radar de subsuelo. Se observa que una mayor heterogeneidad del terreno produce un incremento del ruido de fondo de la señal ("clutter") debida a la retrodispersión de las ondas. El análisis de la amplitud de la señal incoherente, determinada en cada A-sean mediante el valor promedio obtenido en una cierta ventana temporal, permite obtener gráficas de amplitud de ruido de fondo frente a la posición de la traza en el perfil. Los resultados definen claramente los sectores en los que se incrementa el valor de la amplitud, asociándolos con existencia de materiales heterogéneos en la zona más superficial del subsuelo. Por otro lado, el análisis del contenido frecuencial de la señal de radar recibida presenta cambios bruscos que en algunas ocasiones están relacionados con el aumento de la amplitud de "clutter". Sin embargo, en otras ocasiones no aparecen aunque se registre un aumento del ruido. Para analizar el efecto se realizó un estudio estacional en una zona atravesada por rieras subterráneas, comparando los resultados en la época seca con los resultados en la época de lluvias. En el espacio temporal, las rieras subterráneas se podían detectar gracias al aumento del "clutter". Los resultados se compararon con los obtenidos mediante sis mica pasiva. En el espacio frecuencial se observaron mayores cambios en la frecuencia en la época de lluvia, mientras que en la época seca únicamente aparecían estos cambios en los registros obtenidos en la zona en la que había una de las rieras. Se concluyó, por lo tanto, que el estudio del espectro de amplitudes se podía utilizar para determinar la presencia de agua y, en el caso de las rieras, para diferenciar entre rieras activas y cauces secos. Estos resultados son de gran interés para la planificación de infraestructuras de transporte. En la segunda parte de la tesis se analizan los daños en infraestructuras de transporte. En concreto en pavimentos rígidos. A menudo estos pavimentos, construidos mediante losas de hormigón armado, están cubiertos por una capa asfáltica, ya sea por diseño o debido a restauraciones. Las grietas internas que se generan no se observan en superficie hasta fases muy avanzadas. Se propusieron ensayos para determinar la capacidad del georradar para localizar grietas, estudiando el efecto del grosor, la profundidad y del material de relleno. Se observó que se pueden detectar grietas de un tamaño que permite considerarlas como incipientes, aunque la longitud de la grieta vertical sólo se podía detectar en el caso de grietas ya en un estado de daño avanzado (de gran anchura) o bien rellenas de arena saturada o de agua. La disminución en la velocidad de la señal debido a la presencia de agua permitía una mayor resolución. Los resultados experimentales se comprobaron en estudios de campo, en carreteras reales. Se observaron efectos similares aunque con una resolución más limitada. Mediante métodos computacionales se relacionaron las anomalías registradas en los radargramas, tanto experimentalmente como en estudios de campo, con distintos tipos de grietas.
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Lewsley, Gregory. "On the strength of saturated cement-treated soil reconstituted by wet-mixing." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/4175.
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Cutter Soil Mixing (CSM) is a recently developed deep mixing technique that has grown
to include the treatment of sandy and silty soils. This study seeks to investigate the influence of
(i) sand-silt ratio, (ii) cement content, (iii) water content and (iv) time on the unconfined
compressive strength of saturated cement-treated soil specimens. A new test device and method
of specimen reconstitution were conceived in order to obtain a saturated mix of soil and cement.
A comparison of results show strength increases non-linearly to decreasing total water-cement
ratio, and that this trend is largely independent of sand-silt ratio. Furthermore, strength increases
non-linearly with time and is independent of sand-silt ratio. Lastly, it is recommended that the
strength be correlated with total water-cement ratio rather than cement content, in order to
improve data reporting and provide design guidance to engineering practice.
26
ARYAL, SUMAN. "Long-Term Durability of Ordinary Portland Cement and Polypropylene Fiber Stabilized Soil." OpenSIUC, 2019. https://opensiuc.lib.siu.edu/theses/2556.
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Soft soil stabilization frequently uses cement, lime, fly ash, etc., but very limited studies were conducted on the long-term durability of stabilized soil. The present research work deals with the long-term durability of commercially available soil (i.e., EPK clay) stabilized with ordinary Portland cement and polypropylene fiber using a realistic approach, where the effect can be noticed in each weathering cycle. In the present study, two different tests (i.e., wetting-drying and freezing-thawing) were conducted to analyze the long-term durability of stabilized soil. Cycles of higher temperature followed by rainfall, which generally occurs in southern states of the US, were analyzed by the wetting-drying test; and on the other hand, cycles of freezing temperature followed by normal temperature, which generally occurs in northern states of the US and Canada, were analyzed by the freezing-thawing test. For the mid-continental region where freezing, normal, and higher temperature followed by rainfall are expected to occur, hence both the test method i.e., wetting-drying and freezing-thawing, were suggested. Laboratory experimental investigations were conducted to find the percentage loss of stabilized soil during wetting-drying and freezing-thawing tests, which were used as a durability indicator for cement and cement-fiber stabilized soil. Stabilized samples were subjected to harsh environmental conditions in a laboratory set up, and their deterioration was observed and studied after each wetting-drying and freezing-thawing cycle. In the real world, stabilized soil encounters seasonal cycles of monsoon and summer in long run of its service life which was simulated in rapid weathering cycles in laboratory setup. EPK clay samples were stabilized with different percentages of cement, and a mix of cement-fiber combination and were subjected to 12 cycles of wetting-drying and freezing-thawing cycles separately to determine the percentage loss of soil in accordance with the ASTM standards. Finally, based on percentage loss of soil of those stabilized samples which survived up to 12 cycles of weathering action, the optimum content of stabilizing agent was determined for wetting-drying and freezing-thawing tests. Results of wetting-drying tests indicate that EPK clay stabilized with ordinary Portland cement and fiber combination survived up to 12 cycles, but only 10% cement + 0.5% fiber was durable against wetting-drying based on percentage loss. For all the samples stabilized with 10% cement + 0.5% fiber combination, the percentage loss of soil when subjected to durability test was less than 7%, which satisfy the Portland Cement Association’s (PCAs) durability specification. The results of freezing-thawing tests indicate that the EPK clay stabilized with 10% cement, 5% cement + 0.5% fiber, and 10% cement + 0.5% fiber survived up to 12 cycles and were durable against freezing-thawing based on percentage loss of soil i.e., less than 7% which satisfy the Portland Cement Association’s durability specification.
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Al, Quraishi Murtdha Hashim Hassoon. "Reduction in psuedospectral acceleration at soft clay sites with the installation of deep soil mixed soil-cement panels." Thesis, California State University, Fullerton, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10244537.
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Improving the engineering properties of soil through soil modification has been implemented in practice for a number of years. However, construction over soft soil sites has remained a major challenge for projects all over the world because the ground shaking amplifies as it travels through soft soils and will result in an increase in the pseudospectral acceleration. Design of infrastructure depends on the seismic shaking levels from an earthquake. If the amplification of the ground motions can be reduced, the design of the infrastructure can be more economical. For this research, a laminar box was constructed, fitted with a drainage system and filled with a soft clay soil. The laminar box can freely deform during shaking tests and is more representative of free-field conditions. However, previous studies were performed using a rigid box. After the soft clay was consolidated to a pressure of the effective vertical pressure of 10 kPa, accelerometers were installed into the soft clay and a series of unidirectional 1-G shake table tests were conducted with different seismic shaking levels on both models with unimproved and improved soil profiles using deep soil mixed soil–cement panels. The improved deep soil mixed soil–cement panels were constructed at 10% and 20% replacement ratios (RR), which is defined as the ratio of the plan area of the soil-cement to the plan area of the soft clay profile. The present research shows that the deep soil mixed soil–cement panels effectively reduced the pseudospectral accelerations of ground shaking with the installation of panels having both the 10 % RR and 20% RR. On average, a reduction in pseudospectral acceleration was observed to be about 63% for 10 % RR and 59% for 20% RR.
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Geiman, Christopher Matthew. "Stabilization of Soft Clay Subgrades in Virginia Phase I Laboratory Study." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/32499.
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Many pavement subgrades in Virginia consist of wet, highly plastic clay or other troublesome soils. Such soils can be treated with traditional lime and cement stabilization methods. Alternatives, including lignosulfonates and polymers, are available, but their performance record is mixed and solid engineering data is lacking, which prevents reliable design. The goal of this research was to screen a suite of traditional and non-traditional stabilizers against three Virginia soils that have caused problems during construction or resulted in poor performance in service. The selected stabilizers were: quicklime, hydrated lime, pelletized lime, cement, lignosulfonate, synthetic polymer, magnesium chloride, and a proprietary cementitious stabilizer. A laboratory procedure was developed and applied to three Virginia soils obtained from Northern Virginia, Staunton, and Lynchburg.
Key findings from the research include that (1) traditional lime and cement stabilizers were far more effective than liquid stabilizers (lignosulfonate, synthetic polymer, and magnesium chloride) in increasing strength, (2) the liquid stabilizers were ineffective on soils with high moisture content, (3) the proprietary cementitious stabilizer was more effective in increasing strength than lime for all cases tested, but not was not as effective as the cement stabilizer, (4) quicklime and hydrated lime increased workability of the soils although they did not produce strengths comparable to cement, (5) the strength of soils stabilized with cement and the proprietary cementitious stabilizer can be estimated based on the water-amendment ratio of the mixture, and (6) the strength of soils stabilized with lime can be estimated based on a combination of plasticity index and water-amendment ratio of the mixture.Master of Science
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Dad, M. "The use of cement stabilised soil for low cost housing in developing countries." Thesis, University of Newcastle Upon Tyne, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355840.
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Castro, Gonzales Milagros Alessandra, and Pereyra Jesus David Navarro. "Análisis de mejora de suelos arcillosos de alta plasticidad a nivel de subrasante mediante adición de cemento Portland para disminuir el cambio volumétrico." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2019. http://hdl.handle.net/10757/626119.
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Esta investigación comprende el potencial de resistencia y la expansión que presenta el suelo, dicha evaluación es realizada mediante ensayos CBR. Se utiliza la técnica de suelo cemento para mejorar las características físicas y mecánicas, este proceso consiste en mezclar al material con cemento Portland Tipo I formando suelo cemento 10%, 15% y 20%, los cuales presentan un incremento del CBR (máximo: 138.7% y mínimo: 91.9%) logrando un tipo de subrasante extraordinaria para resistir la estructura del pavimento y una reducción de 7.18% en la expansión de las muestras.This research includes the potential for resistance and the expansion that the soil presents, this evaluation is carried out through CBR tests. The soil cement technique is used to improve the physical and mechanical characteristics, this process consists in mixing the material with Portland cement type I. That combination forms soil cement 10%, 15% y 20%, which present an increase of the CBR (max: 138.7% y min: 91.9%) achieving a type of extraordinary subgrade to resist the structure of the pavement and a reduction of 7.18% in the expansion of the samples.
Tesis
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Al-Jabban, Wathiq. "Soil Modification By Adding Small Amounts of Soil Stabilizers : Impact of Portland Cement and the Industrial By-Product Petrit T." Licentiate thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-65813.
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This licentiate thesis presents results of laboratory experiments regarding the effectiveness of adding small amounts of binders in order to modify and improve the mechanical performance of low organic clayey silt soil. Two types of binders have been used i.e. cement and an industrial by-product named Petrit T. The study covered both the immediate and longterm effects on the soil material. Binder content was added by soil dry weight, Petrit T at 2, 4 and 7% and cement at 1, 2, 4 and 7%. An experimental program has been carried out, including tests of consistency limits, unconfined compressive strength, density, solidification, grain size distribution (by laser particle size analyzer) and pH. The tests were conducted on the treated soil with varying binder contents and after different curing periods, i.e. after 7, 14, 28, 60 and 90 days. Results show that cement is more effective in improving the physical and engineering properties than Petrit T. Plasticity index decreases after treatment and leads to an immediate increase in workability. This is found directly after treatment and it increases with time. Soil density increased, whilst water content decreased, with increasing binder content and curing time. Particle size distribution of soil is changed toward the granular side by the reduction of the particles in clay size fraction and increasing silt size particles after 28 days of treatment. Both binder types resulted in an immediate effect on the soil pH value. This value increased to 12.3 after adding 7% of the binder and then it gradually decreased as curing time increased. The cement treated soil exhibits a more brittle failure behavior than the soil treated with Petrit T. In this case a more ductile behavior was observed. The findings confirmed that adding small binder contents of cement and by-product Petrit T significantly improved the physical and mechanical properties of soil, which can contribute to reduce the environmental threats and costs that are associated with using high binder contents in various construction projects.
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Evans, Christopher Ward. "Studies related to the in situ treatment of contaminated ground using soil mix technology." Thesis, University of Birmingham, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342247.
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Mohn, Douglas M. "Impact of Gypsum Bearing Water On Soil Subgrades Stabilized With Lime or Portland Cement." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1430836216.
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Bazazorde, Seyed M. A. "UCS and CBR behaviour of Perth sandy soil reinforced with waste tyre fibres and cement." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2018. https://ro.ecu.edu.au/theses/2076.
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Weak and unsuitable soil conditions have always caused problems for civil engineers during the construction of structures. To avoid problems in a cost-effective manner, proper and reliable solutions need to be developed. Fibre reinforcement and cement stabilisation are the most efficient and common methods in geotechnical engineering applications when engineers have problematic soil conditions. These methods can be used in different applications, such as pavement layers, retaining walls and slopes.
Over the past three decades, many studies have been done to investigate the effects of adding synthetic and natural fibres to soil as the reinforcing material alone or with cement. The present work focuses on investigating the characteristics of local Perth sandy soil after inclusion of waste tyre fibres and cement. These wastes can be utilised in ground improvement projects in large quantities and could provide a cost-effective and environmentally friendly strategy that avoids tyre disposal problems.
Fibres for reinforcement applications in soils are available in different types in terms of materials and their geometrical configurations. Using waste materials, which are present nowadays in large quantities and in different forms, such as used tyres and carpets, as reinforcing materials can be environmentally and economically beneficial. In the past, waste tyres have been used in some geotechnical applications, such as highway construction, retaining wall backfill and drainage layers for roads, but the efforts seem to be insufficient. Although much research has been conducted on cement stabilisation, but on fibre reinforcement, and their combination, no comprehensive research has been done to investigate the UCS and CBR behaviour of sandy soils mixed with cement and tyre fibres, especially on the sandy soils available in Perth and its surrounding areas.
A series of laboratory tests including compaction, unconfined compressive strength (UCS) and California bearing ratio (CBR) tests were conducted to investigate the effects of adding tyre fibre and cement on the engineering behaviour of Perth sandy soil. The contents were varied from 0 to 5% of dried soil by weight for cement and 1% of dried soil by weight for tyre fibres. The cemented specimens were cured in for 3, 7, 14, and 28 days.
This study aims at investigating the effect of different parameters, including cement content, tyre fibre content, curing time and confining pressure on the CBR behaviour of Perth sandy soils. Feasible, ecologically friendly, and economically reasonable solutions, both theoretically and practically, are studied in this research so that geotechnical/civil engineers can effectively use them in the construction projects.
The compaction test results indicate that the maximum dry unit weight generally increases by adding cement and decreases by tyre fibres inclusion, while adding cement and tyre fibre results in a lower optimum water content.
For the fibre-reinforced and unreinforced materials, the compressive strength increases with an increase in the cement content. Adding 1% of tyre fibres to mixtures increases the UCS of the soil approximately by 10-70%. The results also show that as the curing time increases, the UCS increases, and the effect of curing is more pronounced for higher stabiliser contents.
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Szymkiewicz, Fabien. "Évaluation des propriétés mécaniques d’un sol traité au ciment." Thesis, Paris Est, 2011. http://www.theses.fr/2011PEST1120/document.
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Le Soil-Mixing consiste à traiter le sol avec un liant hydraulique en le mélangeant mécaniquement en place pour améliorer ses propriétés mécaniques. Son coté économique ainsi que son faible impact environnemental ont fait de cette méthode jusque là cantonnée à l'amélioration de sols compressibles ou à forte teneur en matière organique une alternative attrayante aux méthodes traditionnelles de renforcements des sols, de soutènements (temporaires voire définitifs), de fondations et de travaux d'étanchéités. Mais avec cette augmentation de la demande, les exigences nouvelles concernant la méthode et le matériau sont apparues.De nombreuses études permettent d'apporter des éléments de réponses. Cependant, il n'existe pas d'étude paramétrique globale étudiant à la fois l'impact du type de sol et de la quantité d'eau sur la caractérisation du matériau Soil-Mixing et qui permettrait d'améliorer les méthodes de dosage ainsi que les méthodes de dimensionnement des ouvrages en Soil-Mixing.Un mélange sol-ciment est composé majoritairement de sol. Le ciment ne représentera au maximum que 30% du mélange. L'approche adoptée est donc plutôt celle du domaine de la géotechnique que des bétons hydrauliques. Nous avons pris le parti de baser notre travail sur une étude de laboratoire, en réalisant des mélanges dits “de référence”. Trois sables et cinq sols fins ont été traités en faisant varier à chaque fois les quantités de ciment et d'eau, afin d'observer l'influence de la granulométrie, de l'argilosité et de la quantité d'eau présente dans le mélange sur la résistance, la rigidité et la déformation à la rupture du matériau. Par ailleurs, des sols reconstitués à base de sable et de sol fin ont été traités afin d'étudier l'impact des fines et de leur nature sur la résistance du matériau. En parallèle, le suivi de différents chantiers nous a permis d'étudier la mise en œuvre de la méthode, l'homogénéité du matériau réalisé in situ, et de comparer les résultats obtenus avec ceux de l'étude paramétrique. Les retombées de ce travail sont la création d'abaques reliant la résistance au dosage en ciment et au rapport C/E, ainsi qu'un tableau de synthèse de données expérimentales des différentes propriétés mécaniques du matériau Soil-Mixing (en fonction de la nature du sol rencontré), et des formules permettant pour les sols grenus de prédire la résistance à 7 et 28 jours en fonction du pourcentage de fines dans le sol et du dosage en cimentThe Soil-Mixing consists in mixing a hydraulic binder into the soil mechanically in order to improve its mechanical properties. Because of its economical as well as its sustainable advantages, this method so far confined to the improvement of compressible or high organic content soils has become an attractive alternative to traditional methods for soil reinforcement, retaining walls (temporary or final), foundations and cutoff walls. But these new applications imply new requirements on the method as well as on the material. Many studies on the subject provide some answers. However, there is no comprehensive parametric study examining both the impact of soil type and the amount of water on the characterization of the Soil-Mixing material and would improve the testing methods and methods for design of structures in Soil-Mixing.Soil-cement mixtures are predominantly composed of soil. The cement will represent at most 30% of the mixture. That is why we have chosen to follow a geotechnical approach rather than the concrete approach for this project.We followed an experimental program based on a laboratory study, realizing mixes called "reference" mixes. Three sand soil and five fine soils were treated by varying each time the quantities of cement and water to observe the influence of particle size, clay content and the amount of water present in the mixes on the resistance of the material, stiffness and failure strain. In addition, soils made from sand and fine soils were reconstituted and treated to study the impact of fines and their nature on the strength of the material.In parallel, monitoring of various projects has enabled us to study the implementation of the method, the homogeneity of the material produced in situ, and to compare the results with those of the parametric study. The results of this work are the creation of abaci connecting the resistance to the cement content and C/E ratio, and a summary table of experimental data of different mechanical properties of the Soil-Mixing material (depending on the nature of the soil), and formulas for granular soils predicting the strength after 7 and 28 days of curing depending on the percentage of fines in the soil and on cement content
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Berté, Susana Dalila Dolejal [UNESP]. "Otimização e estudo do comportamento do solo-cimento auto-adensável." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/91444.
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Esta dissertação trata de uma pesquisa sobre a otimização e o comportamento do SCAA – Solo-Cimento Auto-Adensável tanto no seu estado fresco quanto no seu estado endurecido, confeccionando-se misturas com variação nos teores de cimento, água e aditivo superplastificante. A proposta visa analisar e compreender os desafios de se obter a auto- adensabilidade em misturas de solo-cimento, bem como o comportamento deste material no que diz respeito aos finos do solo e o cimento frente à água, envolvendo a coesão ou dispersão das partículas de solo, na tentativa de determinar qualitativamente ou quantitativamente a fluidez, a homogeneidade, a exsudação, a segregação, a resistência à compressão mecânica e a absorção de água do material. A pesquisa foi dividida em três etapas, sendo elas: o Estudo Preliminar (EP) que contou com 5 misturas, o Estudo de Otimização (EO) que contou com 27 misturas e o Estudo de Aperfeiçoamento (EA). No EP e no EO, com o material no estado fresco, foram efetuados os ensaios do Funil, de Espalhamento, de Segregação e de Adensamento e Moldagem em corpos-de-provas cilíndricos de 5 cm de diâmetro e 10 cm de altura e em formato de estrelas. No EO, os cilindros, no estado endurecido, foram submetidos a ensaios de Resistência à Compressão Mecânica e Absorção de Água, sendo que os resultados de resistência à compressão mecânica de todas as misturas apresentaram valores entre 2,0 e 7,5 MPa, atendendo assim a norma de solo-cimento; e quanto aos valores obtidos de absorção de água, 3 das 27 misturas apresentaram valores superiores ao que a norma estipula como máximo de 20% e as demais misturas apresentaram valores bem inferiores a este. No EA, foi eleita a mistura otimizada, sendo esta repetida e, com ela, confeccionados 20...
This paper is a study on the optimization and behavior of SCSC – Self-Compacting Soil Cement both in its fresh state as in its hardened state, using mixtures with variation in levels of cement, water and superplasticizer. The proposals are to analyze and understand the challenges of attaining a self-compacting soil cement as to understand the behavior of this material, especially the fine part of the soil and cement plus water, involving the cohesion or dispersion of the particles of the soil, in an attempt to determine the flowability, homogeneity, exudation, segregation, the mechanical compressive strength and the water absorption of the material. The research was divided into three stages: the Preliminary Study (PS), which featured five mixtures, the Study of Optimization (SO), which included 27 mixtures, and the Study and Improvement (SI). In PS and SO, during the fresh state of the material, there were performed the tests of Funnel, Scattering, Segregation and molding cylinders of 5 cm in diameter and 10 cm height and some in shape of stars. In the SO, the cylinders, in the hardened state, were tested for compressive strength and water absorption. The results of mechanical compression resistance of all blends showed values between 2.0 and 7.5 MPa, thus according to the standard of soil-cement. On the water absorption test, 3 of the 27 mixtures showed higher values than the standard provides (a maximum of 20%) and the other mixtures showed values well below this. In the SI, the mixture with better results on the tests was selected. With this mixture, it was made 20 cylinders of 5 cm diameter and 10 cm in height, which were tested for compressive strength. Also in SI, the selected mixture was again repeated. This time it was used to assess the feasibility of gravity flow through the passage of the mixture through a funnel... (Complete abstract click electronic access below)
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Berté, Susana Dalila Dolejal. "Otimização e estudo do comportamento do solo-cimento auto-adensável /." Ilha Solteira, 2012. http://hdl.handle.net/11449/91444.
Full textAbstract:
Orientador: Marco Antonio de Morais AlcântaraCoorientador: Antonio Anderson da Silva Segantini
Banca: Sergio Augusto Mello da Silva
Banca: Obede Borges Faria
Resumo: Esta dissertação trata de uma pesquisa sobre a otimização e o comportamento do SCAA - Solo-Cimento Auto-Adensável tanto no seu estado fresco quanto no seu estado endurecido, confeccionando-se misturas com variação nos teores de cimento, água e aditivo superplastificante. A proposta visa analisar e compreender os desafios de se obter a auto- adensabilidade em misturas de solo-cimento, bem como o comportamento deste material no que diz respeito aos finos do solo e o cimento frente à água, envolvendo a coesão ou dispersão das partículas de solo, na tentativa de determinar qualitativamente ou quantitativamente a fluidez, a homogeneidade, a exsudação, a segregação, a resistência à compressão mecânica e a absorção de água do material. A pesquisa foi dividida em três etapas, sendo elas: o Estudo Preliminar (EP) que contou com 5 misturas, o Estudo de Otimização (EO) que contou com 27 misturas e o Estudo de Aperfeiçoamento (EA). No EP e no EO, com o material no estado fresco, foram efetuados os ensaios do Funil, de Espalhamento, de Segregação e de Adensamento e Moldagem em corpos-de-provas cilíndricos de 5 cm de diâmetro e 10 cm de altura e em formato de estrelas. No EO, os cilindros, no estado endurecido, foram submetidos a ensaios de Resistência à Compressão Mecânica e Absorção de Água, sendo que os resultados de resistência à compressão mecânica de todas as misturas apresentaram valores entre 2,0 e 7,5 MPa, atendendo assim a norma de solo-cimento; e quanto aos valores obtidos de absorção de água, 3 das 27 misturas apresentaram valores superiores ao que a norma estipula como máximo de 20% e as demais misturas apresentaram valores bem inferiores a este. No EA, foi eleita a mistura otimizada, sendo esta repetida e, com ela, confeccionados 20... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: This paper is a study on the optimization and behavior of SCSC - Self-Compacting Soil Cement both in its fresh state as in its hardened state, using mixtures with variation in levels of cement, water and superplasticizer. The proposals are to analyze and understand the challenges of attaining a self-compacting soil cement as to understand the behavior of this material, especially the fine part of the soil and cement plus water, involving the cohesion or dispersion of the particles of the soil, in an attempt to determine the flowability, homogeneity, exudation, segregation, the mechanical compressive strength and the water absorption of the material. The research was divided into three stages: the Preliminary Study (PS), which featured five mixtures, the Study of Optimization (SO), which included 27 mixtures, and the Study and Improvement (SI). In PS and SO, during the fresh state of the material, there were performed the tests of Funnel, Scattering, Segregation and molding cylinders of 5 cm in diameter and 10 cm height and some in shape of stars. In the SO, the cylinders, in the hardened state, were tested for compressive strength and water absorption. The results of mechanical compression resistance of all blends showed values between 2.0 and 7.5 MPa, thus according to the standard of soil-cement. On the water absorption test, 3 of the 27 mixtures showed higher values than the standard provides (a maximum of 20%) and the other mixtures showed values well below this. In the SI, the mixture with better results on the tests was selected. With this mixture, it was made 20 cylinders of 5 cm diameter and 10 cm in height, which were tested for compressive strength. Also in SI, the selected mixture was again repeated. This time it was used to assess the feasibility of gravity flow through the passage of the mixture through a funnel... (Complete abstract click electronic access below)
Mestre
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Baker, Spencer Dean. "Laboratory Evaluation of Organic Soil Mixing." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/5640.
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Organic soils present a difficult challenge for roadway designers and construction due to the high compressibility of the soil structure, the often associated high water table, and the high moisture content. For other soft or loose soils (inorganic soils), stabilization via cement or similar binders (a method called soil mixing) has proven to be an effective solution. To this end, the Federal Highway Administration has published a comprehensive design manual for these techniques. Organic soils, however, are not addressed therein to a level of confidence for design, as organic soils do not follow the trends of inorganic soils. This has been attributed to the high porosity, high water content, and high levels of humic acids common to organic soils.
This thesis presents the findings from a literature search, laboratory bench tests, large scale laboratory tests, and concludes with recommendations for design involving soil mixing applications in highly organic soils.
Laboratory tests (bench tests) were performed to assess the effect of cementitious binder type, binder content, mixing method, organic content, and curing time on strength gain. This phase involved over 500 test where in all cases, specimens with organic content higher than approximately 10% required disproportionally more cement for the same strength gain when compared to inorganic or low organic content samples.
Using the findings of the bench tests, a 1/10th scale test bed was built in which soil containing approximately 44% organics was placed and conditioned with rain water. The dimensions of the bed accommodated three side-by-side tests wherein dry and wet soil mixing were performed each on one third of the bed. The remaining third of the bed was left untreated. Load tests were then performed on the three portions of the bed where the load for a simulated roadway was placed. These loads were left in place for several weeks and monitored for movement. Results showed improvement for the treated portions relative to the untreatment with virtually identical response coming from both dry and wet methods (both used identical amounts of cement per volume).
The findings of this thesis suggest that the adverse effects of organic soils can be combatted where more cement content is required to bring the water / cement ratio down to acceptable levels and even more cement is required to offset the acidity. While this has been a recurring observation of past researchers, a cement factor threshold was defined by experimental data below which no strength gain was achieved. This threshold was then defined as a cement factor offset above which the measured strengths matched well with other soil types. As a result, a recommended approach for designing soil mixing applications in organic soils was developed.
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Hope, Charles A. "Evaluation of Portable Devices for Monitoring Microcracking of Cement-Treated Base Layers." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2965.
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A relatively new method used to reduce the amount of cement-treated base (CTB) shrinkage cracking is microcracking of the CTB shortly after construction. Three portable instruments used in this study for monitoring the microcracking process include the heavy Clegg impact soil tester (CIST), portable falling-weight deflectometer (PFWD), and soil stiffness gauge (SSG). The specific objectives of this research were 1) to evaluate the sensitivity of each of the three portable instruments to microcracking, and 2) to compare measurements of CTB stiffness reduction obtained using the three devices. The test locations included in this study were Redwood Drive and Dale Avenue in Salt Lake City, Utah; 300 South in Spanish Fork, Utah; and a private access road in Wyoming. Experimental testing in the field consisted of randomized stationing at each site; sampling the CTB immediately after the cement was mixed into the reclaimed base material; compacting specimens for laboratory testing; and testing the CTB immediately after construction, immediately before microcracking, immediately after each pass of the vibratory roller during the microcracking process, and, in some instances, three days after microcracking. Several linear regression analyses were performed after data were collected using the CIST, PFWD, and SSG during the microcracking process to meet the objectives of this research. Results from the statistical analyses designed to evaluate the sensitivity of each of the three portable instruments to microcracking indicate that the PFWD and SSG are sensitive to microcracking, while the CIST is insensitive to microcracking. Results from the statistical analyses designed to compare measurements of CTB stiffness reduction demonstrate that neither of the instrument correlations involving the CIST are statistically significant. Only the correlation between the PFWD and SSG was shown to be statistically significant. Given the results of this research, engineers and contractors should utilize the PFWD or SSG for monitoring microcracking of CTB layers. The heavy CIST is unsuitable for monitoring microcracking and should not be used. For deriving target CTB stiffness reductions measured using either the PFWD or SSG from specified targets measured using the other, engineers and contractors should utilize the correlation chart developed in this research.
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Ajorloo, Ali Mohammad. "Characterization of the mechanical behavior of improved loose sand for application in soil-cement deep mixing." Thesis, Lille 1, 2010. http://www.theses.fr/2010LIL10044/document.
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Les technologies de mélange de sol en profondeur (« deep mixing ») pour le soutènement des excavations sont de plus en plus utilisées dans le monde. Le mélange de sol en profondeur devient une alternative plus économique aux systèmes traditionnels de soutènement pour les travaux d'excavation, pour la conception des fondations superficielles, l'analyse de la stabilité des talus et de la liquéfaction des sols. Ceci nécessite un développement plus poussé des modèles décrivant le comportement mécanique des sols ainsi améliorés, comme base pour accroitre la sécurité et diminuer les coûts économiques. Cette thèse est basée sur l'étude en laboratoire des caractéristiques de résistance au cisaillement d’un sable siliceux modifié avec du ciment de Portland, seul ou en combinaison avec des liants à réactions lentes (pouzzolaniques) comme des fumées de silice et de la chaux. Les effets de la cimentation sur la résistance, la rigidité et le comportement contractant-dilatant du sable cimenté sont étudiés au cours d’essais de compression simple, de traction, de cisaillement direct et de compression triaxiale drainée pour des éprouvettes maturées jusqu'à 180 jours. Plus précisément, les modes de rupture, les paramètres de résistance au cisaillement pour le sable lâche et dense, le module de cisaillement et les réponses volumétriques, l'état critique des sols cimentés sont décrits. En outre, cette étude vise à développer une formulation « Ready Mix », où le type de liant utilisé et le rapport eau/ciment ou eau/liant jouent un rôle fondamental dans l'évaluation de la résistance visée pour une utilisation en « deep mixing » de sols granulaires de type SM (resp SP) dans la classification LPC (resp USCS). Le comportement contrainte-déformation des sables cimentés est non linéaire avec une alternance contractance-dilatance. Une augmentation de l'angle de résistance au cisaillement et de la cohésion avec l'augmentation de la teneur en ciment a été observée de façon uniforme. Pour le sable sans ciment, la résistance au pic correspond au taux maximum d'expansion volumétrique, alors que pour le sable cimenté elle représente une condition où la sommation de toutes les composantes prend son intensité maximale. Finalement, la corrélation entre la résistance à la compression simple et l'indice lié à la réaction pouzzolaniques de la chaux et de la fumée de silice a été discutéeThe use of deep soil mixing technology for excavation support is growing worldwide. As soil deep mixing becomes a more economical alternative to traditional support systems for excavation, shallow foundation design and analysis of slope stability and liquefaction of soil, the amelioration of models describing the mechanical behavior of improved soil is required, as a basis for cost-effectiveness and a safer design. This work features a laboratory study of shear strength of a loose silica sand modified with Portland cement only or in combination with high curing time binders (due to pozzolanic reactions) such as lime and silica fume. The effects of cementation on the stress–strain behavior, stiffness and strength of treated sand are investigated through unconfined compression tests, tensile strength tests, direct shear tests and drained triaxial compression tests, for curing times up to 180 days. More precisely, failure modes, shear strength parameters for loose and dense sand, volumetric responses and critical state of cemented sand are described. In addition, this study attempts to develop a « ready mix » design procedure, where the type of binder, water/cement or water/ binder ratios play a major part in the assessment of the targeted strength in deep soil mixing applications for loose granular soils (SP in the unified classification). The results show that the stress–strain behavior of cemented sands is nonlinear with contractive–dilative stages. The stress-strain response is strongly influenced by effective confining pressure and cement content. For uncemented sand, the peak strength occurs for a maximum rate of volumetric expansion, whereas for cemented sand it represents a condition where the summation of all components the maximum intensity become. Finally, the correlation of unconfined compression strength with the index of pozzolanic reaction of lime and silica fume is discussed
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Yazici, Veysel. "Stabilization Of Expansive Clays Using Granulated Blast Furnace Slag (gbfs), Gbfs-lime Combinations And Gbfs Cement." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12604946/index.pdf.
Full textAbstract:
Expansive clays undergo a large swell when they are subjected
to water. Thus, expansive clay is one of the most abundant problems faced in geotechnical engineering applications. It causes heavy damages in structures, especially in water conveyance canals, lined reservoirs, highways, airport runways etc., unless appropriate measures are taken. In this thesis, Granulated Blast Furnace Slag (GBFS), GBFS - Lime combinations and GBFS Cement (GBFSC) were utilized to overcome or to limit the expansion of an artificially prepared
expansive soil sample (Sample A). GBFS and GBFSC were added to Sample A in proportions of 5 to 25 percent. Different GBFS-Lime combinations were added to Sample A by keeping the total addition at 15 percent. Effect of stabilizers on grain size distribution, Atterberg limits, swelling percentage and rate of swell of soil samples were determined. Effect of curing on swelling percentage and rate of swell of soil samples were also determined. Leachate analysis of GBFS, GBFSC and samples stabilized by 25 percent GBFS and GBFSC was
performed. Use of stabilizers successfully decreased the amount of swell while increasing the rate of swell. Curing samples for 7 and 28 days resulted in less swell percentages and higher rate of swell.
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Davila, C., C. Davila, R. Vera, L. Pacheco, and G. Duran. "Evaluation of the geotechnical behaviour of a volcanic soil wall with additions of lime and cement against landslides." Institute of Physics Publishing, 2020. http://hdl.handle.net/10757/651794.
Full textAbstract:
The construction of earth walls can be a significant response to prevent the next landslides from reaching the road and avoid accidents. Therefore, a material of the same slope was used and reinforced with mixtures of lime and cement, with this same reinforced material a mechanically stabilized hypothetical earth wall (MSE) was developed. An analysis of the original slope was developed to check if there was a possible failure through its safety factor. Then, a hypothetical wall was developed with a floor reinforced with mixtures, in order to assess its overall safety factor and its maximum landslides. According to the results, in principle it was determined that the dosage M-3 / C-4-4 improves in a range of 30% to 37% the friction angle. In addition, it was found that a reinforced wall, that is to say with Lime and cement additions, presents a better behaviour. In its effect, its displacements are about 8 mm and have a global factor of 1.23.
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Crook, Amy L. "Assessment of the tube suction test for identifying non-frost-susceptible soils stabilized with cement /." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1576.pdf.
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Topoliński, Szymon. "Badanie wytrzymałości kompozytów grunt organiczny-spoiwo cementowe formowanych metodą mieszania." Rozprawa doktorska, Uniwersytet Technologiczno-Przyrodniczy w Bydgoszczy, 2014. http://dlibra.utp.edu.pl/Content/626.
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Praca opisuje wzmacnianie słabonośnych podłoży zbudowanych z gruntów organicznych. Głównym celem badań była ocena praktycznej skuteczności stosowania cementu do wzmacniania gruntów słabonoścnych o różnej zawartości substancji organicznej
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Castro, M., M. Castro, J. Navarro, G. Aybar, and G. Duran. "Analysis of high plasticity clayey soil improvement at subgrade level through Portland cement added to decrease volumetric change." Institute of Physics Publishing, 2020. http://hdl.handle.net/10757/651763.
Full textAbstract:
This research includes the potential for resistance and the expansion that the soil presents, this evaluation was carried out through CBR tests. The soil cement technique was used to improve the physical and mechanical characteristics; this process consists in mixing the material with Portland cement type I. That combination forms soil cement 10%, 15% y 20%, which present an increase of the CBR (max: 138.7% and min: 91.9%) achieving a type of extraordinary subgrade to resist the structure of the pavement and a reduction of 7.18% in the expansion of the samples.
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Silveira, Maitê Rocha. "Efeito da inclusão de tiras poliméricas de polietileno tereftalato e da adição de cimento na resistência mecânica de solo arenoso laterítico /." Bauru, 2019. http://hdl.handle.net/11449/191244.
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Orientador: Paulo César LodiResumo: A proposição de uso de materiais alternativos na construção civil que busquem reduzir a produção de resíduos ou utilizar resíduos anteriormente gerados mostra-se cada vez mais necessária, uma vez que a indústria da construção civil situa-se hoje como uma das maiores consumidoras de matérias-primas naturais. Dessa forma, este trabalho avaliou os efeitos que a inclusão de tiras poliméricas de polietileno tereftalato (PET) cortadas a partir de garrafas plásticas descartadas, e de cimento geram na resistência mecânica de um solo arenoso retirado da região de Bauru (SP). Foram realizados ensaios de resistência uniaxial em solo puro e com a inclusão aleatória de tiras de PET em diferentes comprimentos e porcentagens. Além dos ensaios de resistência não confinada, foram realizados também ensaios de compactação com adições de cimento e com adições de tiras de PET, a fim de se analisar os efeitos destas inclusões aos parâmetros compactação da matriz arenosa. Por fim, foram realizados também ensaios de cisalhamento direto em compósitos de solo-tira, solo-cimento e em compósitos de solo-cimento-tira, tornando possível a avaliação dos efeitos individuais de cada tipo inclusão na resistência ao cisalhamento da matriz. Em relação à resistência uniaxial notou-se o aumento da resistência da matriz arenosa devido à inclusão de tiras, independente do tamanho e percentagens analisadas. Quanto aos ensaios de cisalhamento direto, a adição de cimento foi efetiva aumentando tanto a coesão, quanto o... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The proposition of using alternative materials in construction that seek to reduce waste production or use previously generated waste is becoming increasingly necessary, as the construction industry is today one of the largest consumers of natural resources. Thus, this work evaluated the effects that the inclusion of polyethylene terephthalate (PET) strips cut from waste plastic bottles, and cement generate on the mechanical strength of a sandy soil from Bauru (SP). Unconfined strength tests were performed in pure soil and with the random inclusion of PET strips in different lengths and percentages. In addition to the unconfined strength tests, were also performed compaction tests with cement additions and with addition of PET strips, in order to analyze the effects of these inclusions on the sandy soil. Finally, direct shear tests were also performed on soil-strip, soil-cement and soil-cement-strip composites, making it possible to evaluate the individual effects of each inclusion on the shear strength of the analyzed soil. Regarding the uniaxial resistance, the soil resistance increased due to the inclusion of strips, regardless of the size and percentages analyzed. As for the direct shear tests, the cement addition was effective increasing both the cohesion and the soil friction angle in large proportions. The addition of strips to the soil-cement composite had its most pronounced effect on increasing soil cohesion, often reducing the friction angle. In general, the additi... (Complete abstract click electronic access below)
Mestre
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Lapointe, Emilie. "Cement-treated soil : a comparison of laboratory and field data from Fountain slide remediation deep mixing project." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/42127.
Full textAbstract:
In order to better understand the influence of laboratory reconstitution methods on the strength of cement-treated soil, a laboratory program was undertaken to investigate the unconfined compressive strength of cement-treated specimens reconstituted from low plasticity soils. The laboratory program examines two soil types and two reconstitution methods. The soil samples were taken from a Cutter Soil Mixer [CSM] field improvement site in British Columbia. Two reconstitution methods were used: a saturated wet-mixing method and an unsaturated dry-mixing method. To assess the relevance of using laboratory results to guide design, a subsequent field component of this research compares the strength of test specimens cast from field-mixed cement-treated soil, with the strength obtained from laboratory-reconstituted specimens.
The strength of laboratory-reconstituted soil specimens is largely independent of the soil type and reconstitution method used. A standardized approach for determining cement content in uncured mixed soil-cement is evaluated. Results from the method allow for direct comparison between the strength of field-mixed versus laboratory-reconstituted specimens as a function of the cement content, and/or the water-cement ratio. Based on the simplicity of use and accuracy of results, it is recommended that the Heat of Neutralization method (ASTM 5982-07) be incorporated into the quality assurance program of deep mixing projects.
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Cheung, Kwai Wah. "Large-scale laboratory and in-situ field tests on cemented rubber chips (rubber-soil) as pavement sub-base /." View Abstract or Full-Text, 2003. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202003%20CHEUNG.
Full textAbstract:
Thesis (M. Phil.)--Hong Kong University of Science and Technology, 2003.Includes bibliographical references (leaves 213-216). Also available in electronic version. Access restricted to campus users.
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Dias, Débora Regina. "Resistência à compressão não confinada de misturas de solo-cimento visando à aplicação do sistema de estabilização Dry-Mix." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/258580.
Full textAbstract:
Orientadores: Miriam Gonçalves Miguel, Gladis CamariniDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo
Made available in DSpace on 2018-08-19T22:52:46Z (GMT). No. of bitstreams: 1 Dias_DeboraRegina_M.pdf: 5560763 bytes, checksum: 51614110f36c40f8f18bd356accee7ea (MD5) Previous issue date: 2011
Resumo: Este trabalho vem contribuir com a técnica de tratamento de solos moles por meio do sistema de estabilização Dry-Mix, analisando parâmetros de resistência à compressão não confinada de corpos-de-prova, devidamente preparados com misturas plásticas de solo mole, aglomerante (cimento Portland) e água, em laboratório. O solo utilizado era oriundo da região da Baixada Santista, localizada no Estado de São Paulo. Duas diferentes dosagens de cimento, 100 e 200 kg de cimento por m³ de solo, além de dois diferentes tipos de cimento CP III e CP V, foram utilizadas neste estudo. Os corpos-deprova foram ensaiados à compressão não confinada nas idades de cura de 7, 28, 90 e 180 dias, e submetidos aos ensaios de ultrassom, durante 28 dias. As dosagens inferiores a 100 kg de cimento por m³ de solo apresentaram resultados de resistência à compressão não confinada inferiores a 200 kN/m², não sendo recomendadas para o tratamento Dry-Mix. Os módulos de elasticidade apresentaram valores crescentes até a idade de 28 dias, indicando perda da rigidez após essa idade de cura. Nos ensaios de ultrassom, foram observados resultados significativos somente para os corpos-de-prova com a dosagem de 200 kg de cimento por m³ de solo. Os resultados de resistência à compressão simples foram submetidos a uma análise estatística, na qual as médias dos resultados foram comparadas com o tipo de cimento, a dosagem, a quantidade de turfa e a idade dos corpos-de-prova, utilizando o teste de Tukey, ao nível de 95% de probabilidade estatística. No geral, os melhores resultados ficaram por conta do cimento CP V - ARI, e com a dosagem de 200 kg de cimento por metro cúbico de solo
Abstract: This work focuses on contributing with the soft soil treatment through the use of Dry-Mix stabilization system, analyzing the parameters of unconfined compressive strength tests performed in specimens properly prepared with plastic mixtures of soft soil, binder (Portland cement) and water, in laboratory. The soil used was from Santos city, located in the state of São Paulo. Two different amounts of cement, 100 and 200 kg per cubic meter of soil, as well as two different kinds of cement: CP III and CP V cement were used in this study. The tests were conducted under unconfined compressive strength at ages 7, 28, 90 and 180 days and underwent ultrasound tests for 28 days. The amounts below 100 kg of cement per m³ presented unconfined compressive strength results under 200 kN/m², which are not recommended for Dry-Mix treatment. The modules of elasticity presented increasing numbers up to the age of 28 days, indicating rigidity loss after this age. In the ultrasound tests, significant results were observed only in the test with the amount of 200 kg of cement per soil m³. The simple unconfined compressive strength results underwent a statistic analysis, in which the result averages were compared according to the type of cement and amount, as well as the amount of peat and the tests ages, by using the Tukey's range test at 95% of statistical probability. In general, the best results were presented by the CP V - ARI cement, with the amount of 200 kg cement per m³ of soil
Mestrado
Geotecnia
Mestre em Engenharia Civil
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PEREZ, ISABEL AMADO. "EVALUATION OF THE ENCAPSULATION POTENTIAL OF A CONTAMINATED SOIL WITH ZINC CHLORIDE THROUGH THE LIME AND CEMENT ADDITION." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2017. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=31398@1.
Full textAbstract:
PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIROCOORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
PROGRAMA DE EXCELENCIA ACADEMICA
Junto com o desenvolvimento industrial no Brasil vieram os problemas ambientais, como poluição do ar por gases poluentes, poluição de sistemas hídricos por acidentes ambientais, contaminação de solos provocada pela disposição inadequada de resíduos, entre outros. Em virtude disso as áreas contaminadas foram aumentando e, dessa forma, surgiu a necessidade de formulação de programas de preservação e gerenciamento ambiental, bem como estudos de controle e remediação de áreas contaminadas. Esse estudo tem como objetivo analisar o comportamento de um solo argiloso contaminado por cloreto de zinco quando submetido à técnica de encapsulamento. Essa técnica de remediação consiste na inserção de um agente encapsulante que reage com o solo contaminado, solidificando e estabilizando quimicamente o contaminante. Os agentes cimentantes utilizados nesta pesquisa foram a cal hidratada e o cimento Portland (CP V – ARI). Foram estudadas diversas misturas contendo solo argiloso, cloreto de zinco (nos teores de 5 e 10 por cento) e os agentes encapsulantes (cal e cimento, nos teores de 5 e 10 por cento), em diversos tempos de cura. Caracterização geotécnica, ensaios de compactação, de resistência à compressão simples e ensaio de lixiviação (adaptado à um permeâmetro) foram realizados, assim como as análises químicas das amostras e dos lixiviados coletados, para assegurar a eficiência da técnica de encapsulamento. Ensaios de Tomografia e a Microscopia Eletrônica de Varredura também foram realizados para analisar o comportamento e a estrutura das amostras. Os resultados desta pesquisa se mostraram satisfatórios, uma vez que houve uma significativa redução da concentração de contaminante nos lixiviados quando as amostras continham maior quantidade de agente cimentante, prevenindo a poluição do lençol freático. Além disso, também foi possível notar, a partir dos resultados de resistência à compressão simples, que o tempo de cura e as concentrações de contaminante e dos agentes cimentantes influenciam muito na resistência do solo contaminado. Portanto, essas escolhas são determinantes para a eficiência desse tipo de remediação.
Along with the industrial development in Brazil, several environmental problems arose, such as greenhouse gas emissions, pollution of water systems, soil contamination caused by improper disposal of waste, among others. Because of that, contaminated areas soared and consequently the need for the development of remediation studies of contaminated areas emerged. This study aimed to analyze the behavior of a zinc chloride contaminated soil when subjected to the encapsulation technique. This procedure consists of inserting an encapsulating agent to react with the contaminated soil, solidifying and chemically stabilizing the contaminant. The cementing agents used in this research were hydrated lime and Portland cement (CP V – ARI). Different mixtures of clay soil, zinc chloride (in contents of 5 and 10 percent) and those agents (lime and cement, in contents of 5 and 10 percent) were studied in several curing times. Geotechnical characterization tests, compaction tests, unconfined compressive strength tests and leaching tests (adapted from a permeameter) were performed as well as the leachate and samples chemical analysis to ensure the efficiency of the encapsulation technique. Tomography and Scanning Electron Microscopy were also realized to analyse the the behavior and structure of the samples. Research results were satisfactory, since there was a significant reduction of leachate toxicity when the sample had higher contents of encapsulant, preventing the contaminant to pollute water resources. Moreover, it was also possible to realize, from the unconfined compressive strength test, that the curing time and the contaminant and encapsulant agents concentration influences in the contaminated soil strength. Therefore, those choices are crucial for the efficiency of this type of remediation.