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1
Papargyris, Athanasios D. "Mechanical properties of clay and fibre reinforced clay-based ceramics." Thesis, University of Bath, 1994. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240685.
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Chegenizadeh, Amin. "Experimental approach to investigate reinforced clay." Thesis, Curtin University, 2012. http://hdl.handle.net/20.500.11937/2288.
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Soil reinforcement with discrete flexible fibres has always been an issue for further research. In Geotechnical engineering field, the research on sandy soil has considerably been more than the clayey one. The main reason for this lack can be expressed as the complexity of clayey material due to their cohesion and interaction between clay and reinforcement.The present research aims to show possibility of discrete fibre usage in clay. For this purpose, selection of material has been conducted with special care to make the project outcome applicable to industry projects. The fibre which was used for this research prepared by BASF Company in Western Australia and currently is used in fibre reinforced concrete for infrastructure projects. Kaolin has been used as soil part and provided by Prestige Company.Experimental approach was applied to investigate the effect of different parameters on composite soil strength. These tests cover the variety range of soil mechanics tests from compaction tests to triaxial compression tests. The results from all the tests were presented in the thesis.A theoretical model was also developed for clayey material for the first time with the use of modified cam clay model to predict the behaviour of samples precisely. This model is based on the rule of mixture and considers the effect of soil and fibre separately. The model was validated with the results from CD triaxial test.
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Sharma, Jitendrapal S. "Behaviour of reinforced embankments on soft clay." Thesis, University of Cambridge, 1994. https://www.repository.cam.ac.uk/handle/1810/251757.
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Varathungarajan, David A. "Dynamic shear behavior of a reinforced geosynthetic Clay Liner." Connect to resource, 2006. http://hdl.handle.net/1811/6445.
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Thesis (Honors)--Ohio State University, 2006.Title from first page of PDF file. Document formatted into pages: contains ix, 45 p.; also includes graphics. Includes bibliographical references (p. 43-45). Available online via Ohio State University's Knowledge Bank.
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Qureshi, Muhammad Asif Mahmood. "Glass-fiber reinforced polymer-clay nanocomposites in structural applications." Morgantown, W. Va. : [West Virginia University Libraries], 2009. http://hdl.handle.net/10450/10557.
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Thesis (M.S.)--West Virginia University, 2009.Title from document title page. Document formatted into pages; contains xi, 71 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 69-71).
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Kenny, M. J. "The bearing capacity of clay overlain by unreinforced and reinforced sand." Thesis, University of Strathclyde, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382354.
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Schaefer, Vernon Ray. "Analysis of reinforced embankments and foundations overlying soft soils." Diss., Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/49886.
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The use of tensile reinforcement to increase the tensile strength and shear strength of soils has lead to many new applications of reinforced soil. The use of such reinforcing in embankments and foundations over weak soils is one of the most recent applications of this technology. The studies conducted were concerned with the development of and application of analytical techniques to reinforced soil foundations and embankments over weak soils.
A finite element computer program was modified for application to reinforced soil structures, including consolidation behavior of the foundation soil. Plane strain and axisymmetric versions of the program were developed and a membrane element developed which has radial stiffness but no flexural stiffness. The applicability of the program was verified by comparing analytical results to case histories of reinforced embankments and to model studies of reinforced foundations.
A simplified procedure for computing the bearing capacity of reinforced sand over weak clay was developed which is more general than those previously available. Good agreement with available experimental results was obtained, providing preliminary verification of the procedure.
Extensive analyses were made of a reinforced embankment successfully constructed with no sign of distress, and of two reinforced embankments constructed to failure. These analyses showed that good agreement can be obtained between measured and calculated reinforcement forces, settlements, and pore pressures for both working and failure conditions. The analyses further show that the use of the finite element method and limit equilibrium analyses provide an effective approach for the design of reinforced embankments on weak foundations.Ph. D.
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Liu, Mingyang. "Improved durability and thermal stability of glass fiber reinforced composites using clay-polymer nanocomposites /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?MECH%202009%20LIU.
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Jones, Brendon Ronald. "Geotechnical centrifuge modelling of the behaviour of a compressible clay horizon underlying a reinforced sand foundation." Diss., University of Pretoria, 2014. http://hdl.handle.net/2263/40363.
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Basal reinforcement, where high tensile geogrids are employed beneath structures, is becoming an
increasingly accepted construction technique along the eastern coast of southern Africa. The presence
of compressible, soft, thin and shallow clay horizons usually associated with complex estuarine or
lagoonal deposits are a major consideration when using basal reinforcement as a founding technique.
Basal reinforcement involves the use of high tensile strength geogrids beneath a structure to form a
reinforced sand foundation. Deformation behaviour under loading is an important component of
stability analysis of earth structures. If reinforcement is used, the mechanisms become altered.
Geotechnical centrifuge modelling is a unique physical modelling technique, as it allows replication
of in situ stresses, which is most important because soil behaviour is a function of stress. This is
achieved by placing the model at the end of the centrifuge arm, and subjecting it to an increased
gravitational field, which creates the correct stress distribution in the model. Centrifuge modelling
provides an appropriate technique to observe the behaviour of compressible, soft, thin and shallow
clay horizons when basal reinforcement is utilized. An appropriate centrifuge model was constructed
and compared the behaviour of the clay horizon under unreinforced and reinforced conditions.
Reinforcement configurations were adjusted to observe the influence of additional geogrid layers, and
extension of the width of the reinforcement. It was found that deformation behaviour is distinctly
different between unreinforced and reinforced tests. Vertical deformation in the unreinforced test
localised to the region directly beneath the platform, with little lateral disturbance to the clay horizon
beyond the platform edge. As such, the sand directly beneath the platform acts as a deeper rigid
platform. The deformation behaviour of the clay horizon changes with the inclusion of reinforcement.
When reinforcement is included a wider portion of clay is deformed. The lateral width of this
deformation zone is controlled by the width of the reinforcement, as the applied load is spread. A
‘wide-slab’ effect is evident with an increase in the geogrid width, as the tensioned membrane-effect
is mobilised to increase the capacity of the reinforced foundation sand. This results in a wider portion
of the clay deforming. Addition of geogrid reinforcement to the sand foundation under a wide
platform load enhances deformation of the clay, but has the advantage of an increased load-bearing
capacity of the system. Furthermore, the addition of multiple layers of reinforcement contributes to
this increase in load-bearing capacity. Additionally, increasing the installation width of the
reinforcement contributes to an increased vertical load-bearing capacity. However, this resultant
increase is only mobilised after a certain amount of vertical displacement. This is likely due to the
reinforcement requiring a certain amount of vertical displacement to mobilise tension in order to
support the applied load. The behaviour of a thin compressible clay horizon changes with the
inclusion of reinforcement under a wide platform load. The deformation behaviour of the clay is
increased by additional layers of reinforcement as well as an increase in the width of the
reinforcement. However, the increase in deformation comes at the benefit of an increased vertical
load-bearing capacity of the reinforced foundation sand.Dissertation (MSc)--University of Pretoria, 2014.
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Durham, Adrian Semaj. "INFLUENCE OF CONFINEMENT PLATES ON THE SEISMIC PERFORMANCE OF REINFORCED CLAY BRICK MASONRY WALLS." NCSU, 2002. http://www.lib.ncsu.edu/theses/available/etd-07242002-203905/.
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This thesis focuses on the behavior of clay masonry walls subjected to cyclic racking loading. It proposes that the seismic performance of clay masonry walls can be substantially improved if the section is adequately confined in the extreme compression zone at the toe of the wall to delay crushing of the masonry unit. This is accomplished by placing a 3.2mm thick galvanized steel plate in the mortar joint, of successive courses, in the plastic hinge region of the wall. The objective is investigated by conducting seven tests on full-scale clay masonry walls with various longitudinal and confining reinforcing ratios under seismic excitation. The results presented in this thesis show that adequately confining the grout of the clay masonry walls in the plastic hinge region may lead to substantially favorable seismic performance.
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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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Camli, Umit Serdar. "Anchorage Strength Of Fiber Reinforced Polymers." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606752/index.pdf.
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Fiber reinforced polymers (FRPs) have gained popularity in upgrade projects for reinforced concrete structural elements within the last decade because of its ease of application and high strength-to-weight ratio. In the design of an effective retrofitting solution by means of an FRP system, the anchorage capacity has an important role. This study presents the results of an experimental program conducted to determine the strength of carbon fiber reinforced polymers (CFRPs) bonded to concrete prisms or hollow clay tiles that are finished with or without plaster. In the experimental program, different types of anchorage methods were tested in a double shear push-out test setup. A simple and effective strength model is proposed for strip type anchorages based on the existing analytical models and experimental observations from this study. This new model is suitable for determining the design capacity of CFRP-to-concrete and CFRP-to- hollow clay tile joints with or without plaster and accounts for the presence of embedment and concrete strength. Obtained results by using this model were found to closely match with the experimental observations.
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Butzloff, Peter Robert. "Preparation and Characterization of a Treated Montmorillonite Clay and Epoxy Nanocomposite." Thesis, University of North Texas, 2000. https://digital.library.unt.edu/ark:/67531/metadc2729/.
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Montmorillonite reinforced polymers are a new development in the area of nanocomposite materials. Since reinforcement of epoxy is important to the development of high strength adhesives and composite matrices, the introduction of montmorillonite to epoxy is of interest. Compositional effects on epoxy reactivity, on molecular relaxation, and on mechanical properties were investigated. Change in reactivity was determined by Differential Scanning Calorimetry. Tensile properties at room temperature indicated improved modulus and retention of strength of the epoxy matrix but a decreased elongation to failure. Depression of dry nanocomposite glass transition was observed for nanocomposites beyond 5% by weight montmorillonite. Samples that were saturated with water showed lower moduli due to the epoxy matrix. The greatest moisture absorption rate was found at 7%, the least at 3%.
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Jeludin, Dk Noor Muneerah Pg Hj. "Load transfer mechanism and settlement performance of foundation supported on soft clay reinforced with granular columns." Thesis, Queen's University Belfast, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.546400.
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Aramide, FO, KK Alaneme, PA Olubambi, and JO Borode. "In-Situ Synthesis of Mullite Fibers Reinforced Zircon-Zirconia Refractory Ceramic Composite from Clay Based Materials." International Journal of Materials and Chemistry, 2015. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001844.
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Abstract
Understanding the phase transformations/developments that result due to varying the production parameter of
engineering materials is vital to development of new materials. The effects of yttria and niobium oxide on the phase changes
and mechanical properties of mullite fiber reinforced zircon-zirconia ceramic composites produced by in-situ sintering of raw
materials was investigated. Varied amounts of powder zirconia, yttria and niobium oxide were mixed in a turbula mixer with
a fixed composition of clay (70% volume) of known mineralogical composition and mechanically milled in a planetary ball
mill. The blended powders/clay were compacted into standard sample dimensions, and finally fired at 1400°C and held at
varied time of one, two and three hours. The fired samples were characterized using ultra-high resolution field emission
scanning electron microscope (UHR-FEGSEM) equipped with energy dispersive spectroscopy (EDX), and X-ray
diffractometry (XRD). Various mechanical properties of the sintered samples were also investigated. It was observed that the
investigated mechanical properties (with the exception of shrinkages) improved with the amount of raw zirconia initially used
in the samples. It was also observed that addition of niobium oxide favours the formation polymignite phase, while the
presence of both yttria and niobium oxide in the raw materials resulted in the formation of fergusonite phase in the samples.
Both additives favour the phase transformation of zirconia from monoclinic to tetragonal and cubic phases even at
temperature as low as 1400°C. It was concluded that the improved mechanical properties of the samples was due to
strengthening by both mullite fibers reinforcement and phase transformation strengthening.
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Al, Ammari Kareem. "Predicting stiffness and stress variation of saturated clay improved with vibro stone columns and evaluating its effect on improving reinforced foundations." Thesis, University of Leeds, 2016. http://etheses.whiterose.ac.uk/15699/.
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Vibro stone column techniques create an improved composite foundation in fine grained soils because of: (1) the installed load bearing columns of well-compacted, coarse-grained material and (2) the improvements to the surrounding soil due to the construction of the stone columns consolidating the surrounding soil. Extensive research work has been carried out over the last 20 years to understand the improvement in the composite foundation performance due to the consolidated soil. Few of these studies have quantified the changes in the stiffness and stress state of the treated soil, or have considered the impact that these changes have upon the performance of the composite foundation. Consequently, empirical and conservative design methods are still being used by ground improvement companies leading to a significant range of results in engineering practice. Based on cylindrical cavity expansion theory, two-dimensional finite element study to develop an axisymmetric model of a single stone column reinforced foundation was performed using PLAXIS 2D to quantify the effect of the vibro installation of this column in soft saturated clay by producing the load settlement response of the foundations. An updated mesh was used to cope with the large deformation of the soft clay around the installed column caused by the lateral expansion due to the Vibro technique. Different amounts of lateral expansion were simulated to determine the change in the stress state, stiffness and load settlement response. It was found that the radial expansion increases the pore pressure in the clay that starts to dissipate immediately after finishing the column installation leading to a permanent improvement of the stiffness of the soil which decreases with distance from the column. The radial stress acting on the column also changes creating a new coefficient of lateral earth pressure K, a key design parameter. The effect of these altered soil characteristics were assessed by applying a load to the composite foundation and calculating the resulting settlement. The previous model results have been validated and applied for a well-documented field case of stone column groups using Plaxis 3D after adopting a conceptual model for accumulating the installation effect of two adjacent stone columns. A very good agreement between the recorded and simulated load-settlement curves was achieved after performing few calculation cycles of different degrees of expansion cavity. A simplified design framework base on numerical analysis in how to account for the stone column installation and the recommended degree of applied radial cavity during stone column installation was the main output of this research to achieve more efficient composite foundations.
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Silva, Mondragón Guido Leonardo. "Development of an eco-friendly composite based on geopolymer matrix produced with fired clay brick powder and reinforced with natural fibers." Master's thesis, Pontificia Universidad Católica del Perú, 2018. http://tesis.pucp.edu.pe/repositorio/handle/123456789/13564.
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Current construction industry is responsible for a large amount of greenhouse gas
emissions due to the widespread use of building materials with high-embodied energy
such as ordinary Portland cement-based materials and steel. Therefore, this thesis
presents the development of a new eco-friendly building material based on a
geopolymer matrix produced with Fired Clay Brick Powder (FCBP) and reinforced
with natural fibers as a low CO2 alternative for the traditional building materials.
With this purpose, a review of recent advances in the application of geopolymer
composites and geopolymers reinforced with natural fibers in the construction industry
were first presented. This review covers two major eco-friendly materials for
construction: first, geopolymers obtained from industrial by-products and waste
materials, such as fly ash, ground granulated blast furnace slag, construction and
demolition wastes and main tailings; and second, natural fibers used as reinforcement
for geopolymer composite materials. Literature review allowed the definition of
morphology, size, and the molar ratio of SiO2/Al2O3 in the raw material, together with
the alkaline solution/solid ratio, NaOH concentration, SiO2/M2O molar ratio in the
total alkaline solution and the curing conditions as key parameters in the formulation
of geopolymers. It has been also found that the type, pre-treatment, amount and length
of the natural fibers play an important role in the reinforcement of geopolymer
matrices. Once key parameters of geopolymer composites production were identified,
an attempt for the formalization of a methodology to improve the compressive strength
of FCBP-based geopolymers is presented. The tests allowed the definition of optimum
conditions of the FCBP-based geopolymers formulation and curing conditions, which
resulted in a cementitious matrix with high compression strengths of up to 37 MPa.
Nevertheless, high-strength geopolymers evidenced a fragile behavior and low
ductility similar to Portland cement-based materials. Therefore, the last part of the
work was focused on the evaluation of natural cellulose fibers (jute and sisal) as
reinforcement of FCBP-based geopolymers. The results indicated that jute and sisal
fiber addition at the optimum content significantly improved the compressive, splitting
tensile and flexural strength with respect to the unreinforced geopolymer matrix and
lead to a shifting of the failure mode from a brittle to a more ductile failure in all
mechanical tests.Tesis
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Saad, Suleiman S. E. "Mechanical behaviour of fibre reinforced unsaturated clay : this investigation is to determine the improvement in the mechanical behaviour of unsaturated clayey soil after inclusion of carpet fibre waste." Thesis, University of Bradford, 2016. http://hdl.handle.net/10454/14585.
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To acquire deeper understanding and insights into the mechanical behaviour of fibre reinforced saturated/unsaturated cohesive soils, a programme of work was designed and included. 1) Conducting standard Consolidation Undrained (CU) tests to investigate mechanical behaviour of non-reinforced fully saturated soil. 2) Studying the strength of fibre reinforced clay though unconfined compression tests. 3) Testing the behaviour of unsaturated reinforced soil in unsaturated triaxial tests. 4) Determining the soil-water characteristic curves (SWCC) on soil sample with different fibre content. The investigation was undertaken on a clay of low plasticity index. Samples tested with addition of 1, 3 and 5 % fibre content and different values of matric suction of 50, 100 and 200 kPa, one of the challenges that were encountered in this research are how to prepare homogenous samples. A method for prepared compacted fibre reinforced soils with improved fibre distribution and density profile has been proposed and examined. The test results indicated that waste carpet fibres increase the shear strength of unsaturated clay soils. It was also found that relative increase in strength is also a function of applied suction. An increase in waste carpet fibres was found to reduce the hysteresis of soil. A data analysis conducted on the results of unsaturated tests as a function of fibre content and matric suction. The behaviour modelled was shown to be a perfect fit with the experimental data.
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Alvarez, Benites Nicols Cristina, and Gallegos Julio Alvaro Gutierrez. "Estudio experimental del efecto en el comportamiento mecánico al adicionar caucho triturado en un suelo arcilloso de baja plasticidad proveniente del caserío de Callampampa - Llama–Cajamarca." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2020. http://hdl.handle.net/10757/652828.
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La presente investigación presenta la influencia en el comportamiento mecánico de un suelo proveniente del Caserío de Callampampa, Llama, Cajamarca al adicionar caucho triturado. Este suelo es arcilloso de baja plasticidad y sus parámetros físicos fueron determinados con los ensayos, tales como Análisis Granulométrico por medio del Hidrómetro (MTC E 109 -2016) y por Tamizado (MTC E 107 -2016, NTP 339.128) y la determinación del Límite Liquido, Límite Plástico e Índice de Plasticidad (NTP 339.129).
El ensayo de Proctor Modificado (NTP 339.141), Corte Directo (NTP 339.171) se realizó como parte de la metodología con el fin de conocer los parámetros mecánicos de las muestras y explicar la influencia que causa el caucho triturado en la resistencia al esfuerzo de corte, la cohesión, ángulo de fricción, etc. Las muestras ensayadas fueron la del suelo natural (S100) y las mezclas con adición de caucho triturado en un 0.5%, 1.5%, 2.5% y 3.5%. Los resultados obtenidos indican que la densidad seca máxima que ofrece la mezcla adicionada con 3.5% de caucho triturado (S100/C3.5) se incrementa en un 1.76%, el contenido de humedad óptimo disminuye en un 5.75%, la resistencia al esfuerzo de corte se incrementa en un 35.2%, la cohesión aumenta en un 64% y el ángulo de fricción disminuye en un 9.1% respecto a la muestra S100. Por otro lado, para el ensayo de CBR (NTP 339.145) se tomó en cuenta los resultados obtenidos en los ensayos de Proctor Modificado para hallar los parámetros del suelo al esfuerzo de penetración y ver la viabilidad como terreno para una subrasante. Los porcentajes fueron 1.5%, 2.5% y 3.5% cuyos resultados son comparados respecto al suelo natural (S100). Los resultados obtenidos a 2mm de penetración con un 95% de M.D.S fue para un S100 de 3.3% y con la mezcla de S100/C3.5 se incrementa a 9.4%. En conclusión, el suelo arcilloso de baja plasticidad mejora sus propiedades mecánicas cuando se le adiciona caucho triturado.The present investigation presents the influence on the mechanical behavior of a soil from the Caserio de Callampampa, Llama, Cajamarca by adding powder rubber. This soil is low plasticity clay and its physical parameters were determined with the tests, such as Granulometric Analysis by means of the Hydrometer (MTC E 109-2016) and by Screening (MTC E 107-2016, NTP 339.128) and the determination of the Limit Liquid, Plastic Limit and Plasticity Index (NTP 339.129). The Modified Proctor (NTP 339.141) and Shear Box (NTP 339.171) test was performed as part of the methodology in order to know the mechanical parameters of the samples and explain the influence caused by the crushed rubber in the shear strength, cohesion, friction angle, etc. The samples tested were that of natural soil (S100) and mixtures with the addition of crushed rubber at 0.5%, 1.5%, 2.5% and 3.5%. The results obtained indicate that the maximum dry density offered by the S100 / C3.5 mixture is increased by 1.76% with respect to the S100 sample and the optimum moisture content decreases by 5.75%. Likewise, the resistance to shear stress offered by the S100 / C3.5 mixture is increased by 35.2% compared to the S100 sample, cohesion increases by 64% and the friction angle decreases by 9.1%. On the other hand, for the CBR test the results obtained in the Modified Proctor tests will be required to find the parameters of the soil at the shear strength and see the viability as a terrain for a subgrade. The percentages were 1.5%, 2.5% and 3.5% whose results are compared with respect to natural soil. The results obtained from the 2 mm CBR of penetration with 95% of M.D.S was for an S100 of 3.3% and with the mixture of S100 / C3.5 it was increased to 9.4%. In conclusion, the clay floor of low plasticity improves its mechanical properties when crushed rubber is added.
Tesis
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Kurt, Efe Gokce. "Investigation Of Strenghthening Techniques Using Pseudo-dynamic Testing." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612181/index.pdf.
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Pseudo-dynamic testing was employed to observe the seismic performance of three different retrofit methods on two story three bay reinforced concrete frame structures. The three test frames have hollow clay tile (HCT) infills in the central bay. All of the test frames represent the seismic deficiencies of the Turkish construction practice such as use of plain reinforcing bars, low strength concrete and insufficient confining steel. Two non-invasive and occupant friendly retrofit schemes suggested in the Turkish Earthquake Code, namely use of Fiber Reinforced Polymers and precast concrete panels integrated on the HCT infills and traditional approach of adding concrete infill wall were employed. Specimens were subjected to three different scale levels of North-South component of Duzce ground motion. Reference specimen experienced severe damage at 100% scale level and reached collapse stage due to the loss of integrity of the infill wall and significant damage on the boundary columns. The retrofitted test structures were able to survive the highest level 140% Duzce ground motion. Test results confirmed the success of the retrofit methods for simulated earthquake loads.
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Carda, Vojtěch. "Bytový dům v Třebíči." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265716.
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The content of this thesis is to design four storey block of flats. The house is supposed to be passive. The building is four storey basement, roofed hipped roof, with flat roof operation served as a terrace. The building is located on a plot of number 1037/28 in the village Trebic, cadastral area Trebic. Supporting structures of the house are made of monolithic reinforced concrete frame with masonry infill of clay brick blocks THERM. The building is insulated contact insulation system EPS boards. The roofing is done using a timber truss. The house is based on the base plate. The project includes a seminar work assessing thermal technical and acoustic properties of structures.
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Manivannan, Ganeshalingam Aerospace Civil & Mechanical Engineering Australian Defence Force Academy UNSW. "Viscoplastic modelling of embankments on soft soils." Awarded by:University of New South Wales - Australian Defence Force Academy. School of Aerospace, Civil and Mechanical Engineering, 2005. http://handle.unsw.edu.au/1959.4/38743.
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A major instrumented geosynthetic reinforced approach embankment was constructed to 5.5 m elevation above ground, with prefabricated vertical drains, over a soft compressible clay deposit at Leneghan, Newcastle, Australia in May 1995. The field monitoring of settlements for over six years shows that the embankment manifests significant creep. The instrumentation, field performance and the finite element analyses for predicting the long-term performance of this embankment are described in this thesis. The maximum settlement of 1.1 m was observed one year after the completion of construction. However, the embankment continued to settle at a rate of 0.4 mm/day for the next 5 years. The horizontal displacements of 0.09-0.14 m at various locations and the maximum reinforcement strains of 0.67% were recorded. A numerical model was developed to perform a fully coupled large deformation elasto-viscoplastic finite element analysis for this performance prediction based on creep model proposed by Kutter and Sathialingam (1992). The foundation soil was modelled with creep material behaviour using six noded linear strain triangular elements. A well-documented case history ??? Sackville embankment, New Brunswick, Canada was analysed using this model as a benchmark problem and the model was found to predict all the behaviour characteristics reasonably well. The results obtained from finite element analysis using this model are shown to be in reasonable agreement with the observed performance of Leneghans embankment in terms of settlements, horizontal displacements, excess pore pressures and geosynthetic strains. But, the prediction of settlements was less than satisfactory beyond April 1999. Finite element analyses were performed to study the sensitivity of this embankment behaviour on the variation of hydraulic conductivity values and geosynthetic reinforcement properties. This sensitivity study indicated that the kv variation, the kh/kv ratio and the nominal values of geosynthetic properties adopted in the benchmark analysis are reasonable enough for the long-term behaviour prediction.
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Jenerál, Pavel. "Polyfunkční dům." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392225.
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The Thesis deals with a proposal for a new mixed-used building in the city of Moravske Budejovice in the cadastral area of Moravske Budejovice. The building is a three-floored house without a cellar. The roof of the house is completely flattened. On the first floor, there are commercial rooms, hairdresser´s and a bookshop. Apartments are on the second and third floor. The construction will be built of clay blocks which are 300 mm wide. The insulation of the building is formed by thermal insulation composite system. The ceiling is created by reinforced concrete slabs 250 mm wide. Parts of the documentation are water-supply, electricity, pipeline and waste water pipe. The description of pavement and driveway is included. The Thesis is written as a project to build the construction.
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Jurka, František. "Bytový dům, Brno - Židenice." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227838.
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Subject of this diploma thesis is desing dokumentation of apartment house. Documentation contains all requisites according to valid regulations. House is designed as detached basement house with one underground floor and five aboveground floors. Object is based on reinforced concrete foundation pads. House is roofed with a flat roof. House contains 18 dwelling units with balconies or terraces. In object is solved parking in underground floor. Vertical load-bearing structure is made of clay blocks. Floors are made of cast-in-place reinforced concrete. Underground floor load-bearing structure is reinforced concrete frame. House is insulated with contact thermal insulation. Mechanical resistence and stability, health protection, healthy live conditions and enviroment, fire security, safety in use of building, energy savings and thermal protection is ensured.
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Dvořáková, Jana. "Domov pro seniory." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409989.
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The aim of this diploma thesis is to elaborate the project documentation of a new-built home for the elderly, in the cadastre unit of small town Blížkovice. It is a three-storey building with a basement. On the basement there are cellar berths, garage and technical facilities. On the first floor there is facilities, dining rom, a doctor´s surgery, massage, hairdresser´s and pedicure. On the second and third floor there are common areas and a total of twenty-two residentail units (1+kk – eighteen flats, 2+kk – two flats). The vertical loadbearing structures are made of clay blocks and lost formations. The object is insulated by a contact thermal insulation systém. The horizontal loadbearing structures and staircase are made of reinforced monolithic concrete slab. The roof consists of a flat roof with extensive green and terrace. There are ten parking spaces on the ground.
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Burget, Jan. "Centrum zdraví Mediface." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-371891.
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Project of health center with facilities for civic amenities. It is a three-storey above ground object. On the ground floor there is a pharmacy, a veterinary station and a medical office. On the second floor there are six medical offices and a technical room. On the third floor there are 4 spaces for civic amenities. Vertical load-bearing structure consists of masonry of ceramic blocks and internal monolithic reinforced concrete skeleton. Horizontal load-bearing structure is made of reinforced concrete beams and prestressed reinforced concrete panels. The building is based on concrete foundation strips and reinforced concrete pads. The building is roofed with a warm flat green roof. Thermal insulation of the facade is made of mineral wool insulation and has a ventilated facade.
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Juhászová, Michaela. "Ubytování pro mládež." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240000.
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The aim of this thesis is the design of an youth apartment building in the range of designing the documentation for building construction. The building is situated on the flat plot no. 873/21 in the cadastral area „Horní Heršpice“ 612065. In the building there is 42 rooms, 2 wheelchair-accessible rooms and 4 student apartments. The capacity of the building is designed to accommodate 86 students under 18 years and 16 students older than 18 years. In the building there is also a dining room, a library, a fitness room and a gym for free time. It is partly a two-storey and partly a four-storey building without a basement, roofed by a flat roof. Masonry is designed from clay blocks and floor slab is designed by a cast-in-place reinforced concrete floor structure.
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Purket, Petr. "Objekt ubytovny pro studenty." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265379.
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The aim of this thesis is design of an apartment building for students. The design is in the range of the documentation for designing building construction based on the decree 499/2006 Sb. as amended by decree 62/2013 Sb. The building is situated on the plots 1220, 1219/1, 1218/11 and 1218/2 in the cadastral area „Letovice“. The new building is designed to accommodate students for year-round occupancy. There is a dining room for staying students and students from nearby schools as well. In the new building are also multimedia classrooms, library, reading rooms, club rooms, gym and lecture hall available for students. In the building are 30 rooms. The capacity of the building is designed to accommodate 81 students. The building has three floors, a loft and no basement. Masonry is designed from clay blocks and floor slab is designed as a cast-in-place reinforced concrete floor structure.
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Šimek, Pavel. "Polyfunkční dům." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226702.
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Master´s thesis is designed as a complete documentation of a multifunctional house. The multifunctional house is located in the town Nová Paka and functionally designed as a restaurant, garages and 8 flats. Built-up area is 886.95 square meters. The building is covered with a flat roof. The supporting structure is designed prefabricated reinforced concrete frame. Infill walls are made of clay blocks Porotherm. The house is insulated contact system ETICS. The thesis contains a static layout, fire safety, energy saving and safety in use. Drawings were processed with software for design - ArchiCAD.
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Koláčková, Michaela. "Objekt pro seniory Ořechov." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372190.
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The subject of the diploma thesis is processing of the technical part of the project documentation for the new three-storey home for elderly with partial basement, which is located in the village Ořechov. The object is situated on a flat terrain, which is situated little bit higher than local road. That was used for an architectonic conception of the house –basement is open and accessible by local road from the north side, the rest is under ground. The detached building is partly roofed by a flat green roof and partly roofed by flat roof covered with gravel. The object is divided into individual areas. In the second and third floor is living and social area. 11 dwelling units of different sizes are designed. First floor is also accessible to the public and together with entrance hall and reception, which is situated in the middle of the object with the main entrance on the east side, there are another two separate areas. The left wing serves as a medical department, in the right wing is cofé with his own staff facilities. In the basement is a utility room and storage areas.
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Libřický, Zdeněk. "Sportovně relaxační centrum." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372110.
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The final thesis is focused on the design and elaboration of the project documentation of the sports and relaxation center. The proposed building is located in the south-eastern part of the town of Hradec Králové, in a location supposed for buildings and areas of sports and relaxation use. It is a three-storey building with a flat roof and partial basement. The construction system is wall-mounted with a combination of skeleton. The building is based on plain concrete and reinforced concrete foundation footing. The peripheral, supporting and partition walls are designed from ceramic blocks POROTHERM. The inner load-bearing elements consist mainly of reinforced concrete columns. The ceiling structure is designed from reinforced concrete slabs supported locally. The perimeter walls of the first overground floor and part of the perimeter walls of the basement are insulated by an external contact thermal insulation system. The thermal insulation of the perimeter walls of the second floor is designed by means of a ventilated facade with facade tiles except the squash courts and the relaxation area. The building is functionally divided into three main parts, where the central part forms an entrance hall with comunication spaces of all floors. In this part a basement with technical facilities is designed. The right part of the ground floor consists of a restaurant with a bowling alley and a kitchen with storage and hygienic facilities. As part of this section, a gym and exercise rooms for fitness exercises, spinning and TRX are designed on the second floor. The left part consists of two squash courts with the appropriate facilities and massage areas. There is also a relaxing facilities with a north-facing terrace on the second floor. There are also dressing rooms and hygienic facilities. The designed object is accessible for disabled people. There is a parking lot for 40 cars, 3 motorcycles, one bus and three barracks for cars.
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Vojtek, Ondřej. "Stavebně technologický projekt bytového domu v Brně - Slatině." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372271.
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This diploma thesis deals with construction and technological project of apartment building in Brno – Slatina, Kigginsova street. Thesis focus on technological phase of monolithic rough superstructure and masonry work. For this phases were processed technogical specifications and controlling ad testing schedules. Within this thesis was also compiled technical report, solution of transport roads, technical report and drawings of site equipmet. For main object was compiled itemized budget, which was foundation for completing time schedule. In diploma thesis are further processed safety requirements and chosen construction details.
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Veselý, Tomáš. "Centrum vodního lyžování Soběslav." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265223.
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The thesis is focused of proposal and procesing of project documentation Center for waterskiing. The proposed object is located in the western part of the town Soběslav, in the locality aimed at sports activities. The building is created of facilities for summer sports, especially water skiing and wakeboarding. Further there will be built a playground for ball sports and track on roller skates. This is a three-storey no with a cellar object with a flat roof. The object is based on the foundation reinforced concrete pads a strips. The first floor is bricked of permanent formwork and partly of cast in place structure. The second and third floors is designed of clay blocks POROTHERM. This masonry is insulated with the aid of external contact thermal insulation. In the western part of the building is designed ventilated facade. The floor structures is designed from prestressed reinforced concrete panel SPIROLL and partly from reinforced concrete slabs. The object is divided into several operating units. They are the gym and its facilities, restaurant with kitchen, facilities for employees and the necessary storerooms, coffeehouse, shop with sporting equipment, rental equipment for water skiing and a dressing room serving the outdoor sports. The essential part of the second floor is comprised outdoor terrace. From this terrace is allowed entry to the coffeehouse, restaurants, shops and on the main staircase.
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Řehoř, David. "Hotel." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227321.
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The objective of this thesis is to draw up the design documentation for the construction of a hotel. The hotel is situated on the edge of the golf resort Kaskáda near to Jinačovice. It’s a brick building with two above – ground floors and one underground. There is the staircase in the building that creates protected escape route. The perimeter wall is designed of ceramic bricks Porotherm T Profi. They are filled – in by mineral wool. The hotel is divided into three dilatational parts. There are 35 guest rooms in the hotel; two of them are barrier – free, in total 63 beds. In the ground floor there are entrance, reception, restaurant, bar, kitchen with the background. In the basement there are technical equipment, a fitness room, a wellness, changing rooms, washrooms and a bar. The roof of the hotel is flat. There is the terrace accessible from the apartments in the second floor above the restaurant.
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Svoboda, Jan. "Sportovní centrum Polička." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240241.
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This thesis deals with the design and elaboration process of a project documentation of a sports centre. The designed sports centre building is situated in the southern part of the town of Polička, in the area determined for sports and free time activities complexes and areas. It is a two-floor, non-cellar, flat-roof building. It is based on plain concrete strip foundations and reinforced concrete foundation footing. The bearing, peripheral and partition walls are designed from POROTHERM hollow clay blocks. Reinforced concrete columns are designated in open disposition areas. The ceiling construction is made from SPIROLL pre-stressed concrete floor slabs and point-supported reinforced concrete slabs. The peripheral walls of the first aboveground floor are insulated with external thermal insulation system with a protective gabion facade. The peripheral wall thermal insulation in a bowling restaurant and gym halls extension is designed from a ventilated facade with CEMBRIT METRO facade cladding panels. The building is functionally divided into two main parts with a shared entrance. The sports centre with gyms and other sports facilities form the first part. Three squash courts, a mini-football piste, a special room for spinning and alpinning, a room for group exercising and cloakrooms with sanitary facilities are designed within one part of the sports centre. A restaurant with a bowling area and a kitchen with storerooms and other facilities for employees form the second part. The designed complex is barrier-free. There is aimed to be a car park for fifty cars, four motorbikes and a bus in front of the building. Three parking places are for disabled people.
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Neduchal, Zbyněk. "Modernizace bytového domu Vlhká 22, Brno." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-410057.
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The diploma thesis processes project documentation in the stage of construction for modernization of an apartment house near the center on the street Vlhká 22 in Brno. The building is divided into four residential floors and nonresidential basement and attic. On the first floor there are two residential units and the other four residential units. The foundation structures are made of solid bricks. The vertical load-bearing and non-load-bearing structures are also made of solid bricks. Exceptionally drywall partitions. In the basement, the ceiling structures are made of brick barrel vaults, above the above-ground floors there are wooden beamed ceilings. The roof structure of the building is made of purlin system with standing stool and covering of ceramic roof tiles. Three additional housing units will be built in the attic. In the basement, the masonry will be undercut by a chain saw, partly by pressure grouting and partly by a new layer with a waterproofing layer. All wood-beamed ceilings will be replaced with prefabricated ceiling beams with aerated concrete inserts without overhead slab. The garden part of the building will be insulated with mineral wool. The roof structure will be constructed from the street side as a shed roof and in the garden part a flat roof with a gradient layer of expanded polystyrene thermal insulation and a waterproofing layer of thermoplastic poleolefin.
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Výborný, Václav. "Příprava realizace polyfunkčního domu v Pardubicích." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240493.
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The main contens of the thesis is solving a construction-technological project substructure and the upper shell construction of a polyfunctional building in Pardubice. Excavation and foundation work are done in section A and B1 and B2. Drilled piles are foundation of a polyfunctional building. Drilled piles are support of reinforced concrete grillage, which are from strips foundation and foundation pads. Cast-in-place concrete frame is a form of load-bearing structure, which contens plate ceilings, pillars and walls. Peripheral masonry is from hellow clay blocks, which are between cast-in-place concrete frame. Diploma thesis includes technical report, plan of building side, schedule and the budget of the building, technological instructions, radon prevent, control and testing plan, safety, balance resources, selected constructional details, machinery composition, bill of quantities.
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Yu, Lui Chia, and 呂佳育. "Clay reinforced polyamide resin." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/48201029955546524061.
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碩士輔仁大學
化學系
93
In my research, using different ion exchangers modify hydrophilic sodiun Montmorillonite ; meanwhile, through co-rotating twin screw extruders with high shear stress, hydrophilic Montmorillonites are able to be dispersed homogenously into the Nylon 6T matrix. Besides , preparing the nylon 6T/clay nanocomposites is to discuss the systems of different ion exchangers with various ratios of Nylon 6T/clay nanocomposites blended. Here I used XRD to define my products , then TGA and DMA are used to evaluate the thermal traits as well as the physics properties and the machnical changes. Owing to the research results, when the additons of Montmorillonites below 3 phr, then the thermal property of Nylon 6T/Clay nonocomposites enhance obviously, and the machnical strength as well .
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楊政翰. "Clay reinforced epoxy nanocomposite:structure effect." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/43925549319991004074.
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碩士輔仁大學
化學系
92
The synthesis of epoxy /clay nanocomposite are polymerized with the organic clay blending in the epoxy matrix . What influences the properties of nanocmposite materials crucially is the distribution level of clay in epoxy resin. Yet ,besides the development and affinity of clay, the structures of curing agents don’t dissolve in clay well ,which makes the makes the clay not be able to distribute in the caved-net of the crossed link efficiently ,moreover ,restraining the reaction among molecules, making the crossed-link incompletely ,and lead to the mechanical strength down. The alteration of structures of curing agents in clay, enhancing the specific characters in materials ,which can promote the development the development in nanocomposites in the future. Hence, in order to find the better condition ,we attempt to switch of the curing agents to research the change in thermal properties and mechanical properties of composites’ materials. According to the theory, although the micro-filler has a better effect than nano ones on clay, as far as a sphere-shaped filler is merely concerned, nano possessing the greatest aspect reaction making the tenacity enhancing can be expectable. In this experiment, the discussion is situated the effect on the material properties with adding different curing agents. The investigation reveals that the character of materials is in an inverse ratio with the length of curing agents. We can aim directly at the demand of different utilization to switch the structures of curing agents, as the curing agents with the extraordinary functional group are able to reinforce some properties of materials.
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Yi-Shan, Lin, and 林羿刪. "Clay Reinforced Aqueous Dispersed Polyurethane System." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/87118958262820689013.
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碩士輔仁大學
化學系
92
Waterborne montmorillonite/polyurethane nanocomposites dispersions were synthesized by polyurethane and various synthetic montmorillonite clay in which the exchange cation have been replaced by diethanolamine onium salt、triethanolamine onium salt、ethanolamine onium salt、(C16H33)2 im、(C3H7)2 im and (C14H29) im(C2H4OH) via prepolymer ionomer mix process. Cross-linking reactions between polyurethane and silicate layers in the presence of the(C14H29)im(C2H4OH) organoclay afforded elastomeric nanocomposites in which the clay nanolayers were exfoliated. The nanolayer reinforced polymer exhibited substantially improved tensile properties，enhanced thermal and resistance to swell by water in comparison to the pristine polymer. Also，nanolayer reinforcement greatly reduced the structure damage. The dispersion of layered silicates was found to be transformed from an intercalated to an exfoliated structure when the number of carbon groups of the swelling agent increased as evidenced from the TEM and X-ray diffraction analysis. In particular，a 2.1-fold increase in Youth’s modulus occurred in the nanocomposites of polyurethane containing only 0.5wt% (C14H29) im(C2H4OH) swelling-agent-modified silicates as compared to diethanolamine onium salt swelling-agent-modified silicates。
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張詠昌. "Liquid Crystal / Clay Reinforced Epoxy Resin." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/50430419389497208524.
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碩士輔仁大學
化學系
92
In this experiment , we use Na-motmorillonite. We use different modifying agent to switch the Na-motmorillonite to the hydrophobic motmorillonite , than a series of different proportion of Epoxy / PU / Liquid Crystalline / Clay , nanocomposites are prepared. The products from the epoxy with different modifying agent blended , grafty and blend clay and Epoxy / PU / Liquid Crystalline / Clay . The three prepared systems are invesgated in XRD , SEM and evaluated the thermal properties in TGA , DMA , at the same time , the change of the physical chemical and mechanical properties can be observed . The result reveals that the grafty clays have best effect . There is an apparent enhancement in the thermal stability and mechanical strength of the nanocomposites.
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Leu, An-Lih, and 呂安立. "Infiltration tests and analysis on reinforced clay wall." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/56927093811207385758.
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Saride, Sireesh. "Behaviour Of Geocell Reinforced Foundation Beds." Thesis, 2005. http://etd.iisc.ernet.in/handle/2005/1489.
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Chen, Wen-Chou, and 陳文洲. "Anisotropic Behavior and Strength Evaluation of Grout Column Reinforced Clay." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/84388253566304174936.
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碩士國立臺灣科技大學
營建工程系
92
Jet grouting method is usually used to improve soft clay associated with deep excavation. The purpose of this study is to investigate the failure behavior and strength characteristics of the composite soil specimen consisted of soft clay and treated material by changing the stress path and the improvement ratio. The test results are used to evaluate and verify the empirical formulas that are commonly used to estimate the equivalence strength of the composite soil. Finally, methods are developed to reasonably estimate the equivalent strength of the composite soil element subjected to various stress paths. Results from the true triaxial test indicate that (1) the grout piles in the composite soil specimen exhibit apparent shear fissures for stress path angles (θ) of 0 , 30 , and 60 . The grout piles exhibit apparent tension fissures for stress path angles of 90 , 120 , 150 , and 180 . (2)For the stress path angles of 0 , 30 and60, the composite soil specimens exhibit axial compression failure. For the stress path angles of 120 and 150 , the composite soil specimens exhibit lateral compression failure. For stress path angles of 90 and 180 , the composite soil specimens exhibit tension failure. (3)When using the axial compression equivalence strength formula to evaluate the strength, the strength is increased linearly as the improvement ratio increases. However, the strength increase tendency of the test results is like a natural log curve. Thus, the formula can’t evaluate the axial compression strength accurately, especially for tests of higher improvement ratio. (4) The axial tension equivalence strength formula can evaluate the strength accurately. (5) The equivalent strength formulas developed in this study can predict test results accurately. The average errors of the predictions are less than 4%.
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Lee, shiao-Lin, and 李小林. "Development of Clay Reinforced Epoxy Nanocomposites With Wide-Frequency Damping Properties." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/90872686377959060196.
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碩士輔仁大學
化學系
91
It is known that the interpenetrating polymer networks (IPN) of butylacrylate/ethylacrylate/glycidyl methylacrylate copolymers (BA/EA/GMA) and epoxy resins exhibit excellent damping behaviours. However, the mechanical properties of those IPNs are extremely low. Therefore, it is important to improve its mechanical properties but retain damping properties. The experiments conducted in this research include (1) clay modification (2) control of the molecular weight of the BA/EA/GMA copolymers (3) structure characterization of copolymers (4) evaluation of the mechanical and damping properties. The dynamic mechanical analysis (DMA) revealed that the IPN which was formed from the copolymer with the molecular weight of 19,000 g/mol and with mixing ratio of 1:1 (copolymer/epoxy) resulted in best damping behaviour. The loss factor (tan δ) shifted to the higher temperature as decreasing the copolymer contents and/or decreasing its molecular weight. Although the XRD (X-ray diffraction) showed that the clay reinforced IPN system is an intercalated type, the tensile strength could successfully be increased to four times while 2% of clay was added. Further increase the amount of the clay contents will reduce the damping behaviors.
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Mirzababaei, M., Mostafa H. A. Mohamed, A. Arulrajah, S. Horpibulsuk, and V. Anggraini. "Practical approach to predict the shear strength of fibre-reinforced clay." 2017. http://hdl.handle.net/10454/13385.
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yesCarpet waste fibres have a higher volume to weight ratios and once discarded into landfills, these fibres occupy a larger volume than other materials of similar weight. This research evaluates the efficiency of two types of carpet waste fibre as sustainable soil reinforcing materials to improve the shear strength of clay. A series of consolidated undrained (CU) triaxial compression tests were carried out to study the shear strength of reinforced clays with 1%, to 5% carpet waste fibres. The results indicated that carpet waste fibres improve the effective shear stress ratio and deviator stress of the host soil significantly. Addition of 1%, 3% and 5% carpet fibres could improve the effective stress ratio of the unreinforced soil by 17.6%, 53.5% and 70.6%, respectively at an initial effective consolidation stress of 200 kPa. In this study, a nonlinear regression model was developed based on a modified form of the hyperbolic model to predict the relationship between effective shear stress ratio, deviator stress and axial strain of fibre-reinforced soil samples with various fibre contents when subjected to various initial effective consolidation stresses. The proposed model was validated using the published experimental data, with predictions using this model found to be in excellent agreement.
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Jane, Kuo-yuh, and 簡國裕. "Seepage analysis on reinforced wall backfilled with clay considering anisotropic hydraulic conductivity." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/68569909676755472754.
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Chan, Chen-Hao, and 詹振浩. "Bearing Capacity Analysis of a Strip Footing Overlying Geosynthetic Reinforced Soft Clay." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/38828230689784078055.
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碩士逢甲大學
土木及水利工程研究所
88
The propose of this research is to analyze the effect of reinforcement on bearing capacity of rigid and flexible strip footings which are located on soft clay by using numerical method. Different reinforced conditions are study to explore the optimum arrangement of reinforcement. The reinforced zone is modeled with the discrete method, which includes strain-softening model, elastic-plastic reinforcing element and elastic-plastic interface element. The design parameters and soil models used by Pan Zi-Yi in 1999 for the analysis of reinforced earth wall are adopted in the current study. The soft soil of the foundation is modeled with Mohr-Coulomb model. The conclusions of this study are summarized as below: (1) The effect of the increase of the width of reinforcement on bearing capacity of the footing is enhanced by the increase of the layer of reinforcement. At the same width of reinforcement, the increase of bearing capacity of the footing can be more than the increase of the layer of reinforcement. It should be noted that the width of the reinforcement must be longer than the width of the footing. (2) The bearing capacity of the footing is affected by the depth of reinforcement. The bearing capacity of the footing is increased by the increase of the depth of reinforcement at the limit of this study. (3) The results of current study indicate that the influence of the increase of the layer of reinforcement on bearing capacity is negligible within the limit of this study. (4) The increase of bearing capacity of the rigid footing is more affected by the increase of reinforced width than that of flexible footing.
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Huang, Bor-Nan, and 黃博男. "long term observation and lnfiltration tests of full-scale reinforced clay walls." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/95055731483876021947.
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Chien, Chia-Wei, and 簡嘉緯. "Model test for a laminated reinforced sand column embedded in soft clay." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/03046153351933003865.
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碩士淡江大學
土木工程學系碩士班
102
Sand columns have been used in engineering practice to improve the bearing capacity of soft clay in recent years. Although the sand column can bear axial stress and shear stress from surface load, but due to the lack of lateral confining pressure in the near-surface that often caused bulging failure in the top portion of the column, reduce the carrying capacity of the sand column. Reinforce a sand column with laminated geosynthetics is feasible and effective solution to improve bearing capability of a sand column. In this study, model test on single geosynthetic-laminated sand columns installed in soft clay was conducted. Similarity analysis was executed first to determine suitable properties of the constituents used in the model tests to ensure comparable behavior between the prototype-scale and model-scale reinforced granular columns. Three types of geosynthetics was employed to reinforce the sand columns either with 5 or 10 layers of geosynthetic sheets horizontally placed in these model sand columns. Experimental results showed that horizontally inserted reinforcements improve the bearing capability of the model sand columns; marked improvement was achieved for sand columns reinforced with geotextile of relatively medium to high stiffness. Horizontal reinforcement also restrained radial strain of the columns significantly. Additionally, horizontal reinforcements affected stress transmission character along the length of the sand column and thus the bearing capability of the column.