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Letteratura scientifica selezionata sul tema "Pavements with cementitious layers"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 18 febbraio 2022

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Articoli di riviste sul tema "Pavements with cementitious layers"

1

Dondi, Giulio, Francesco Mazzotta, Claudio Lantieri, Federico Cuppi, Valeria Vignali e Celestino Sangiovanni. "Use of Steel Slag as an Alternative to Aggregate and Filler in Road Pavements". Materials 14, n. 2 (12 gennaio 2021): 345. http://dx.doi.org/10.3390/ma14020345.

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Today the use of Construction and Demolition Materials (CDM) can be considered as a suitable solution for the construction or the rehabilitation of road pavements. In this context, it is central to minimizing waste production, favoring the reuse through new production cycles to replace virgin natural raw materials. As illustrated in this study, steel slag has mechanical properties that justify its use as aggregate in the manufacture of bituminous mixes. In road construction, their use is focused on the substitution of fine aggregate and filler in bituminous mixtures. Mechanical characterizations, Marshall stability and indirect tensile resilient modulus (ITSM) tests were used to evaluate the laboratory performance of the mixtures. The research aims are to provide the use of these materials for the construction of the entire road pavement structure; in this study authors used these materials both in the characterization of cementitious layers and in those with bituminous conglomerate. In both cases, the use of steel slag has favored an increase of stiffness in the mixtures.

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2

Soares, Roberto, Rielle Haichert, Diana Podborochynski e Curtis Berthelot. "Modeling in Situ Performance of Cement-Stabilized Granular Base Layers of Urban Roads". Transportation Research Record: Journal of the Transportation Research Board 2363, n. 1 (gennaio 2013): 88–95. http://dx.doi.org/10.3141/2363-10.

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This study used a three-dimensional nonlinear orthotropic computational road model to measure the performance of reclaimed and recycled portland cement concrete (PCC) aggregates and reclaimed asphalt pavement (RAP) aggregates stabilized with cement as a base layer in a typical local road structure in the city of Saskatoon, Saskatchewan, Canada. The pavement structure was composed of 45-mm hot-mix asphalt concrete on a 225-mm granular base built directly over an in situ subgrade. The cross section was analyzed with a conventional granular base layer as a baseline and PCC and RAP base layers with 2% cement stabilization. The cement-stabilized PCC and RAP base layers showed improved shear strain and horizontal strain behavior when compared with the conventional granular base layer (which was not cement stabilized). This improvement con-firmed that cement stabilization of reclaimed PCC and RAP materials provided an enhanced primary response. This study demonstrated that typical thin Saskatoon pavement structures were highly dependent on the constitutive properties of base layer material. Stabilizing the PCC and RAP base layers with 2% cement reduced the maximum shear strains at the edge of the pavement structure by 12% and 25%, respectively, compared with the unstabilized conventional granular base layer. It was believed that the increased fracture and cohesion of the residual cementitious materials inherent to recycled granular base, as well as the cementitious binder added, improved structural performance.

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3

Rashidi, Mohammad, Reza S. Ashtiani, Jimmy Si, Richard P. Izzo e Mark McDaniel. "A Practical Approach for the Estimation of Strength and Resilient Properties of Cementitious Materials". Transportation Research Record: Journal of the Transportation Research Board 2672, n. 52 (14 maggio 2018): 152–63. http://dx.doi.org/10.1177/0361198118769900.

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Cementitious stabilization of granular soils has been proven to be a cost-saving option for the use of materials with marginal quality in the construction and rehabilitation of pavement structures. The orthogonal load distribution capacity of the Cement-Stabilized Materials (CSM) is typically characterized by Unconfined Compressive Strength (UCS), Indirect Tensile Strength (IDT), and Resilient Modulus (Mr) tests in the laboratory. The aforementioned parameters and properties are integral components of the analysis and design of pavements with stabilized layers. Time and budget constraints make it impractical for many state agencies to complete the full laboratory characterization protocols to determine all the design input parameters. Therefore, in many cases, the design engineers opt out of laboratory testing and primarily rely on past experience and engineering judgments to assign design input parameters. Such an approach compromises the reliability of the pavement life predictions, and can potentially incur unforeseen costs to the traveling public. This study was designed to bridge this gap by developing a series of statistically robust relationships between the laboratory achived data to provide an estimate of the design input parameters. To accomplish this objective, 570 stabilized cylindrical specimens were prepared and subjected to UCS, IDT, and submaximal modulus tests at three strength ratio levels. Subsequently, the relationships between the IDT, UCS, and resilient modulus at small-strain and intermediate strain levels were developed in this study. Such relationships can serve as a valuable means for the estimation of the tensile and compressive strength of the CSM for pavement design.

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4

Costa, Juliana O., Paulo H. R. Borges, Flávio A. dos Santos, Augusto Cesar S. Bezerra, Wim Van den bergh e Johan Blom. "Cementitious binders and reclaimed asphalt aggregates for sustainable pavement base layers: Potential, challenges and research needs". Construction and Building Materials 265 (dicembre 2020): 120325. http://dx.doi.org/10.1016/j.conbuildmat.2020.120325.

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5

Pan, Yang, e Chao Wu. "Experimental Study on the Impact Fatigue Behavior of GFRP Mesh Reinforced ECC for Runway Pavement Application". MATEC Web of Conferences 275 (2019): 01010. http://dx.doi.org/10.1051/matecconf/201927501010.

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Concrete pavement is easy to crack and generate the chunks, which may destroy the engine of the airplane and maintenance cost is very expensive. Engineered cementitious composites (ECC) is ductile with microcracks, but its strength is low. Glass Fiber Reinforced Polymer (GFRP) mesh imbedded in ECC could improve the strength. This paper investigates the impact fatigue behaviour of ECC and GFRP mesh reinforced ECC under 5 different impact pressures (1.61 MPa, 1.88 MPa, 2.10 MPa, 2.41 MPa and 3.60 MPa), the concrete specimens were also tested for comparison. The pulse velocity through the specimens was also tested to analyse the damage of the specimens. The experimental results show that GFRP mesh reinforced ECC has improved impact fatigue behaviour than ECC specimens. The concrete specimens were all broken after a few impacts, but the GFRP mesh reinforced ECC specimens were all not broken after impacted for 30000 times. The impact fatigue behaviour of ECC reinforced with two layers of GFRP mesh with a grid dimension of 10 mm was the best, which is a desirable pavement composite comparing to the ordinary concrete and ECC without reinforcements.

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6

Ariyo, Adanikin, Funsho Falade e Adewale Olutaiwo. "Microstructural Analysis of Concrete Using Cow Bone Ash for Alkali-Silica Reaction (ASR) Suppression". Journal of Casting & Materials Engineering 4, n. 2 (15 luglio 2020): 34–40. http://dx.doi.org/10.7494/jcme.2020.4.2.34.

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Concrete pavements are prone to microstructural changes and deterioration when exposed to Alkali-Silica Reaction (ASR). ASR results in strength reduction, cracking, spalling and other defects in the concrete if left unchecked. Supplementary Cementitious Materials (SCMs) such as Cow Bone Ash (CBA) however can be used to improve concrete performance, hence its use in this study. Concrete samples were prepared at replacement levels of 0%, 5%, 10%, 15%, 20% and 30% of cement with Cow Bone Ash. The concrete samples were then subjected to petrographic and Scanning Electron Microscopy (SEM) analysis. Petrographic examination shows that the minimal and least amount of ASR gels and micro cracking were observed at 15% CBA replacement of cement in the concrete samples. Scanning Electron Microscopy (SEM) analysis shows that changes in the elemental composition of the concrete samples is related to the effect of CBA which enhances adhesion in the concrete. SEM analysis show that, in general, the change in microstructure in the concrete was mainly due to the change in the arrangement of the C-H-S compounds. The microstructure analysis indicates that CBA in concrete influences the densification of the concrete at the transition zone, resulting in a much lower porosity. This results in the concrete having a tightly bound layer that repels ingress of water and thereby inhibiting cracks and gel formation as water is a contributing factor to the ASR in concrete.

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7

Li, Xiaojun, Jingan Wang, Haifang Wen e Balasingam Muhunthan. "Field Calibration of Fatigue Models of Cementitiously Stabilized Pavement Materials for Use in the Mechanistic-Empirical Pavement Design Guide". Transportation Research Record: Journal of the Transportation Research Board 2673, n. 2 (febbraio 2019): 427–35. http://dx.doi.org/10.1177/0361198118821924.

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The use of cementitiously stabilized materials (CSM), such as lean concrete, cement-stabilized aggregate, and soil stabilized with cement, lime, fly ash, or combinations thereof in the subgrade, sub-base, and base layers of flexible and rigid pavement structures, is a widely accepted practice by many state highway agencies. However, the bottom-up fatigue cracking models of cementitiously stabilized layers (CSL) described in the AASHTO Interim Mechanistic-Empirical Pavement Design Guide Manual of Practice (referred to as the MEPDG) have not been calibrated for CSM based on their field performance. In addition, top-compression fatigue as well as the effects of increases in the modulus and strength values of CSM over time, erosion, and freeze–thaw and wet–dry cycles on the fatigue properties of CSM are not considered in the MPEDG. To address these deficiencies, this research calibrated the bottom-up fatigue model, and developed and calibrated the top-compression fatigue model, with consideration of modulus and strength growth, erosion, and freeze–thaw and wet–dry cycles. Reasonable correlations between the predicted modulus values and measured modulus values are found for CSL. Further study is needed to refine the calibration and validate the models based on a larger population of field data that covers different material types, climatic zones, and traffic conditions.

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8

Bajak, Marzena. "Mechanical characteristics of Asphalt-Cement Concrete foundations (ACC)." Budownictwo i Architektura 1, n. 1 (11 dicembre 2007): 057–86. http://dx.doi.org/10.35784/bud-arch.2302.

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Asphalt Cement Concrete (ACC) is a new material. On the basis of Kuhn’s paradigm, conventional methods which are proper for similar road pavement materials were applied for studying the ACC. ACC is obtained from cold mixing technology such ingredients as cement-sand mortar or cement-mineral aggregate mortar, or cement-sand-mineral aggregate mortar with recycled Asphalt Concrete (AC) mixture or with recycled Mastic Asphalt (MA) mixture. Quick setting cement (CEM I 52,5 NA) is used in all mentioned cases. Novelty of the presented material is due to existence of two internal bounds - flexibility and rigidity. Such ACC parameters as stiffness, deformability and strength in general depend on type and characteristics of cementitions grout which coats applied recycled asphalt materials and fills mixture’s air voids. ACC layer stability may be predicted using viscoelastic model parameters of constitutive relations, including Burgers model, under steady and slow loadings, finally expressed by exponential formulae. This is the research study. Its basic part consists of laboratory and field testing and obtained tests results analysis. Further, road pavements were designed with subbase of ACC with improved performance comparing to typical materials.

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9

de Larrard, François, Rafael Martinez-Castillo, Thierry Sedran, Philippe Hauza e Jean-Eric Poirier. "Cementitious artificial aggregate particles for high-skid resistance pavements". Road Materials and Pavement Design 13, n. 2 (giugno 2012): 376–84. http://dx.doi.org/10.1080/14680629.2012.666642.

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Marszałek, Jan, Karolina Gulańczyk e Paweł Muzolf. "Strengthening airfield pavements with cement concrete layers". Bulletin of the Military University of Technology 67, n. 2 (29 giugno 2018): 119–32. http://dx.doi.org/10.5604/01.3001.0012.0972.

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The paper presents original solutions and methodology for determining the thickness of cement concrete strengthening layers for repairing and upgrading existing flexible and rigid airfield pavements. Flow diagrams and nomograms for determining edge stress were developed. These are novel solutions which have not been presented in a similar form before now. After deriving the above relations, a method for the practical utilisation of the resulting monograms depending on the parameters of existing airfield pavement and properties of the cement concrete strengthening layer is presented. Preparing calculation-based charts using the derived equations will markedly shorten the procedure of selecting the thickness of cement concrete strengthening layers for existing flexible airfield pavements that require repair depending on the degree of their wear. Keywords: rigid airfield pavement, flexible airfield pavement, pavement strengthening

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Tesi sul tema "Pavements with cementitious layers"

1

De, Beer M. "Behaviour of cementitious subbase layers in bitumen base structures". Pretoria : [s.n.], 2009. http://upetd.up.ac.za/thesis/available/etd-08042009-115309/.

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2

William, Gergis W. "Backcalculation of pavement layers moduli using 3D nonlinear explicit finite element analysis". Morgantown, W. Va. : [West Virginia University Libraries], 1999. http://etd.wvu.edu/templates/showETD.cfm?recnum=530.

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Thesis (M.S.)--West Virginia University, 1999.
Title from document title page. Document formatted into pages; contains ix, 166 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 149-158).

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3

Neithalath, Narayanan. "Development and characterization of acoustically efficient cementitious materials". Skokie, Ill. : Portland Cement Association, 2004. http://www.cement.org/bookstore/profile.asp?itemid=SN2924.

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4

Chan, Francis Wai Kun. "Permanent deformation resistance of granular layers in pavements". Thesis, University of Nottingham, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278287.

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5

Nassar, Ahmed Izat Mohammed. "Enhancing the performance of cold bitumen emulsion mixture using supplementary cementitious materials". Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/38473/.

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Several benefits are gained from using cold mix asphalt (CMA) instead of hot mix asphalt (HMA). The benefits include conservation of materials and reducing energy consumption, preservation of the environment and reduction in cost. One of the common types of CMA is cold bitumen emulsion mixture (CBEM) which is the mixture produced by mixing mineral aggregate with bitumen emulsion. Despite the efforts applied in the last few decades in order to improve and develop CBEM utilization, certain deficiencies remain that make it inferior to HMA, resulting in restricting or minimizing of its use. However, the development of CBEM for road construction, rehabilitation and maintenance is steadily gaining interest in both pavement engineering industrial and research sectors. The present study was primarily aimed at evaluating the effect of using different cementitious materials on the performance of CBEM. The idea of the research is to provide a sustainable filler from supplementary cementitious materials (SCMs) to be used as fillers to provide enhanced properties of CBEMs. By achieving this aim it is expected that the utilization of CBEM would increase, allowing them to be used as structural pavement materials with some confidence. Research was first undertaken to optimize the mix design of CBEM using a statistical approach known as response surface methodology (RSM), as an alternative approach to achieve acceptable engineering properties. The optimization of CBEM was investigated, to determine optimum proportions to gain suitable levels of both mechanical and volumetric properties. This optimization focussed on the mix design parameters, namely bitumen emulsion content (BEC), pre-wetting water content (PWC) and curing temperature (CT). This work also aimed to investigate the effect of the interaction between these parameters on the mechanical and volumetric properties of CBEMs. The results indicate that the interaction of BEC, PWC and CT influences the mechanical properties of CBEM. However, PWC tends to influence the volumetric properties more significantly than BEC. The individual effects of BEC and PWC are important, rather than simply the TFC which is used in conventional mix design of CBEM. Furthermore, the experimental results for the optimum mix design corresponded well with model predictions. It was concluded that optimization using RSM is an effective approach for mix design of CBEMs. The study also investigated in-depth the performance characteristics of CBEMs using different filler treatments. The study was extended to understand the performance enhancement through mineralogical and microstructural investigations. The research was designed to use cement, binary and ternary blended fillers (BBF and TBF). Fly ash (FA) and ground granulated blast-furnace slag (GGBS) were used as BBF while silica fume (SF) was added to the BBF to obtain TBF. A significant improvement was achieved in mechanical and durability properties of CBEMs due to incorporation of both cement and blended fillers. Also, the results indicated that TBF was more suitable than BBF for the production of CBEMs. The microstructural assessment indicated that the effect of BBF on the internal microstructure of CBEMs was slightly negative and more noticeable in CBEMs containing FA. Mineralogical and microstructural assessments also suggested that the presence of bitumen emulsion might not affect the hydration of the silicates in treated CBEMs. The formation of additional CSH was observed due to the replacement of conventional limestone filler by cement, BBF and TBF. However, it seems that this can cause a delay in the formation of other hydration products (Ettringite) resulting from the hydration of aluminates in cement. Furthermore, it is proposed that the addition of SF to BBF mixtures can eliminate the delay in formation of hydration products caused by the bitumen emulsion. The present work was also aimed at better understanding the curing mechanism of CBEMs and to bridge the gap between laboratory curing and field evolution of these mixtures. This was achieved by evaluating the effect of the curing process on CBEM performance and developing a prediction model to assess in-situ CBEM performance using maturity relationships. Different contributory factors affecting the curing process were investigated such as curing temperature and relative humidity (RH) in addition to the impact of curing time and the presence of cement/active fillers. The results indicated that high curing temperature is responsible for additional stiffness gain by increasing the binder stiffness due to ageing and by increasing the moisture loss by evaporation during the curing process. However, at high curing temperature the moisture loss by evaporation may hinder the hydration of cement/active fillers. Moreover, the results also indicated that the high RH level influences the stiffness modulus of CBEMs negatively. The laboratory results were then used to develop a tool to assess in-situ curing of CBEMs using the maturity approach, which is widely used to estimate in-situ concrete properties. A strong correlation was found between maturity and the stiffness values obtained from the laboratory tests, which resulted in development of maturity-stiffness relationship. The application of this relationship to assess the in-situ stiffness of CBEMs is presented using three hypothetical pavement sections in the United Kingdom, Italy and Qatar; to simulate different curing regimes. A pavement analysis and design study was conducted to evaluate the incorporation of treated CBEMs into a pavement structure. CBEMs are suggested to be used in two scenarios: the first is as a surface course and the second is as a base course. The scope of the study is limited here to design based on the fatigue criterion only. Although, the structural design was based on practical hypothetical layer thicknesses, the results provided useful insight into the structural capabilities of CBEMs.

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6

Muslich, Sutanto. "Assessment of bond between asphalt layers". Thesis, University of Nottingham, 2010. http://eprints.nottingham.ac.uk/11115/.

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Asphalt pavements are usually constructed in several layers and most of pavement design and evaluation techniques assume that adjacent asphalt layers are fully bonded together and no displacement is developed between them. However, full bonding is not always achieved and a number of pavement failures have been linked to poor bond condition Theoretical research showed that the distribution of stresses, strains and deflections within the pavement structure is highly influenced by the bond condition between the adjacent layers. Slippage at the interface between the binder course and the base could significantly reduce the life of the overall pavement structure. If slippage occurs within the interface between the surfacing and the binder course, the maximum horizontal tensile strain at the bottom of the surfacing becomes excessive and causing the rapid surfacing failure. This condition becomes worse when a significant horizontal load exists. This thesis is concerned with the assessment of bond between asphalt layers. The main objective of this thesis is to provide guidance for assessing bond between asphalt layers, in order to facilitate the construction of roads with more assurance of achieving the design requirements. Further modification to the modified Leutner test has been performed. An investigation regarding the torque bond test and the effect of trafficking on bond have also been undertaken. A bond database on the modified Leutner test has been developed. An analysis has been performed to estimate the achievable values of bond strengths on typical UK road constructions obtained from the bond database. The values were then compared to the results from an analytical analysis to predict the required bond strength at the interface and other standards in Germany and Switzerland to recommend specification limits of bond strength for UK roads.

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De, Beer M. "Aspects of the design and behaviour of road structures incorporating lightly cementitious layers". Pretoria :[s.n.], 1990. http://upetd.up.ac.za/thesis/available/etd-07282008-125449.

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8

Clapp, Joshua David. "Analysis of Rutting Development in Flexible Pavements with Geogrid-reinforced Base Layers Using 3D Finite Element Analysis". Fogler Library, University of Maine, 2007. http://www.library.umaine.edu/theses/pdf/ClappJD2007.pdf.

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9

Karagoz, Cem. "Analysis Of Flexible Pavements Incorporating Nonlinear Resilient Behavior Of Unbound Granular Layers". Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/2/12605320/index.pdf.

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Traditionally, the resilient modulus values obtained from repeated unconfined or triaxial compression tests are used as the elastic modulus of granular layers in structural analysis of flexible pavements. Sometimes the resilient modulus of granular materials are estimated from known California bearing ratios (CBR) or stabilometer resistance (R) values by simple regression equations. On the other hand, it is well known that stress-strain relation for unbound granular materials is nonlinear and the resilient modulus increases with the increase in stress intensity. There exist several models for stress dependent nonlinear behavior of unbound granular materials. These models are incorporated into elastic layered analysis by applying a method of successive approximations in order to get more realistic pavement responses. Kenlayer is a popular computer program incorporating nonlinear behavior of granular materials in elastic layered system. In this computer program, the resilient modulus of granular materials are varied in vertical direction only, without considering variations in radial direction. In this study, simplest model namely K-Q model for stress dependency of granular layer is applied in structural analysis of flexible pavements. This model is adopted for use in finite element analysis carried by SAP90 software. Analyses are performed over 24 different three-layered pavement structures by changing asphaltic concrete modulus values, granular base thicknesses, base materials and subgrade modulus values. Critical pavement responses namely tensile strains at the bottom of asphaltic surface layers and compressive strains on top of subgrade are obtained for each pavement by linear layered elastic, nonlinear layered elastic and nonlinear finite element solutions. The pavement lives are calculated by using selected performance equations. The results of layered systems and finite element solutions are compared. It is observed that, results obtained from finite element model and linear elastic solutions differ considerably.

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Jafer, H. M. "Soft soil stabilisation using a novel blended cementitious binder produced from waste fly ashes". Thesis, Liverpool John Moores University, 2017. http://researchonline.ljmu.ac.uk/7541/.

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Soil stabilisation is one of the most common techniques used to mitigate the undesirable properties of soft soils such as low compressive strength and high compressibility. Cement is the most commonly used binder for soil improvement applications in the UK and worldwide due to its high strength performance. However, its manufacture is energy intensive and expensive, contributing approximately 7% of global carbon dioxide (CO2) emissions. Therefore, the search for alternative raw materials, such as waste and by-products, is becoming critical in order to develop cost effective and more environmentally friendly binders to replace cement and reduce its negative environmental impact. Blended waste material fly ashes have been identified as promising alternatives to traditional binders (cement CEM-I) in different construction industries including ground improvement. The reuse of waste material fly ashes such as waste paper sludge ash (WPSA), palm oil fuel ash (POFA) and rice husk ash (RHA) has many advantages, specifically in terms of eliminating the cost of their transportation and eventual landfill, their continuous supply and the negligible, or zero, cost of production. This research project details the process of the development of a new cementitious binder, produced by blending cement-free WPSA, POFA and RHA under physico-chemical activation using flue gas desulphurisation (FGD) gypsum, for use in soft soil stabilisation. The effects of different binders produced from unary (WPSA), binary (WPSA and POFA) and ternary (WPSA, POFA and RHA) blended mixtures, along with ground and FGD gypsum activated ternary mixtures, on the geotechnical properties of soft soils, were extensively investigated. Comparisons of Atterberg limits, strength (unconfined compressive strength (UCS)), compressibility characteristics and durability (wetting-drying cycles effect) of untreated soil and soil stabilised with the optimum unary, binary, ternary and activated ternary mixtures and a reference cement treated soil, have been carried out. An investigation of the microstructural and mineralogical composition of the newly developed binder, in comparison to those of the reference cement, was also carried out using X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM) imaging and energy dispersive X-ray (EDX) spectroscopy analysis. The results indicate that the soil stabilised with the ternary mixture activated by FGD gypsum (T+FGD), had the greatest compressive strength, compressibility and durability improvement; the performance of the newly developed cementitious binder was comparable to that of the reference cement. This binder comprises 8% WPSA + 2% POFA + 2% RHA activated with 5% of FGD, by the total mass of binder. The addition of FGD gypsum has been observed to enhance the pozzolanic reaction, leading to improved geotechnical properties; mainly UCS which increased over time of curing and exceeded that for the soil treated with reference cement, after 180 days. The results obtained from XRD analysis, SEM testing and EDX analysis revealed the formation of hydrated cementitious products represented by calcium silicate hydrates (C-S-H), Portlandite (CH) and ettringite. The formation of these hydrates reveals the developments gained in the geotechnical properties of the treated soil. A solid, coherent and compacted soil structure was achieved after using T+FGD, as confirmed by the formation of C-S-H, CH and ettringite. Therefore, a new, Cost effect, eco-friendly and sustainable cementitious binder has been successfully developed and can be used with confidence for soft soil stabilisation, as a 100% replacement of conventional cement.

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Libri sul tema "Pavements with cementitious layers"

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Wen, Haifang, Balasingam Muhunthan, Jingan Wang, Xiaojun Li, Tuncer Edil e James M. Tinjum. Characterization of Cementitiously Stabilized Layers for Use in Pavement Design and Analysis. Washington, D.C.: Transportation Research Board, 2014. http://dx.doi.org/10.17226/22247.

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2

Nunn, M. E. Prediction of permanent deformation in bituminous pavement layers. Crowthorne, Berkshire [England]: Transport and Road Research Laboratory, 1986.

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Nunn, M. E. Prediction of permanent deformation in bituminous pavement layers. Crowthorne, Berks: Transport and Road ResearchLaboratory, Highways & Structures Dept., Pavement Design & Maintenance Division, 1986.

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4

Signore, J. M. Accelerated testing of separation layers for open-graded drainage layers. [Edwardsville, Ill.]: Illinois Transportation Research Center, Illinois Dept. of Transportation, 1998.

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5

Patrick, J. E. Fatigue resistance of thin modified bituminous layers: Literature review. Wellington, N.Z: Transfund New Zealand, 1997.

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Daines, M. E. Cooling of bituminous layers and time available for their compaction. Crowthorne, Berkshire: Pavement Materials and Construction Division, Highways and Structures Department, Transport and Road Research Laboratory, 1985.

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Daines, M. E. Cooling of bituminous layers and time available for their compaction. Crowthorne, Berks: Transport and Road Research Laboratory, Highways and Structures Dept., Pavement Materials and Construction Division, 1985.

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8

Freeman, Thomas J. Develop maintenance strategy selection procedures for pavements incorporating semi-rigid or chemically stabilized layers. College Station, Tex: Texas Transportation Institute, Texas A & M University System, 1998.

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9

Lytton, Robert L., Xue Luo, Meng Ling, Yu Chen, Sheng Hu e Fan Gu. A Mechanisticâ€"Empirical Model for Topâ€"Down Cracking of Asphalt Pavements Layers. Washington, D.C.: Transportation Research Board, 2018. http://dx.doi.org/10.17226/25304.

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10

Jung, F. W. Direct calculation of maximum curvature and strain in AC layers of pavements from load deflection basin measurements. Downsview, Ont: Research and Development Branch, Ontario Ministry of Transportation, 1989.

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Capitoli di libri sul tema "Pavements with cementitious layers"

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Livneh, Moshe. "On the Fatigue Criterion for Calculating the Thickness of Asphalt Layers". In 7th RILEM International Conference on Cracking in Pavements, 761–70. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-4566-7_74.

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Pszczoła, M., e J. Judycki. "Evaluation of Thermal Stresses in Asphalt Layers Incomparison with TSRST Test Results". In 7th RILEM International Conference on Cracking in Pavements, 41–49. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-4566-7_5.

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Gouveia, Beatriz Chagas Silva, Francesco Preti, Elena Romeo, Eshan V. Dave, Gabriele Tebaldi e Jo E. Sias. "Rutting Performance Analysis for Pavements with Bituminous Stabilized Mixtures as Base Layers". In RILEM Bookseries, 1649–55. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-46455-4_209.

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Grellet, Damien, Guy Doré, Jean-Pierre Kerzreho, Jean-Michel Piau, Armelle Chabot e Pierre Hornych. "Experimental and Theoretical Investigation of Three Dimensional Strain Occurring Near the Surface in Asphalt Concrete Layers". In 7th RILEM International Conference on Cracking in Pavements, 1017–27. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-4566-7_97.

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Abed, Farid H., Munir D. Nazzal, Mousa F. Attom, Magdi E. El-Emam, Nouran ElMessalami e Saif Al-Dabagh. "The Use of Wastewater in Construction of Base Course Layers in Pavement Structures". In Advancement in the Design and Performance of Sustainable Asphalt Pavements, 31–37. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-61908-8_3.

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Girardi, Graziela, Mohammad Ramezani e A. O. Abd El Halim. "Effect of Construction Induced Cracks on Tensile Strength and Bonding Between Asphalt Concrete Layers of Pavement Under Different Temperatures". In Advancement in the Design and Performance of Sustainable Asphalt Pavements, 85–97. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-61908-8_7.

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Rodriguez, Camilo Andrés Múñoz, Washington Peres Núñez, Jorge Augusto Pereira Ceratti, Lélio Antônio Brito, Ângela Gaio Graeff e Luiz Carlos Pinto da Silva Filho. "Evaluating the Feasibility of Using an Engineered Cementitious Composite in the Rehabilitation of Pavements by Means of APT and Laboratory Tests". In Lecture Notes in Civil Engineering, 319–28. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-55236-7_33.

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Coban, Haluk Sinan, Bora Cetin, Halil Ceylan, William Likos e Tuncer B. Edil. "Effects of Using Recycled Aggregates and Large Stones for Base and Subbase Layers on Modulus Properties of Pavements". In Lecture Notes in Civil Engineering, 363–72. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-77230-7_28.

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Pettinari, Matteo, Bjarne Schmidt, Bjarne Jensen e Ole Hededal. "New surface layers with low rolling resistance tested in Denmark". In Asphalt Pavements, 323–32. CRC Press, 2014. http://dx.doi.org/10.1201/b17219-46.

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"New surface layers with low rolling resistance tested in Denmark". In Asphalt Pavements, 347–56. CRC Press, 2014. http://dx.doi.org/10.1201/b17219-47.

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Atti di convegni sul tema "Pavements with cementitious layers"

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Musso Laespiga, Marcos, e Leonardo Behak Katz. "Performance of Low-Volume Roads with Wearing Course Layer of Silty Sandy Soil Modified with Rice Husk Ash and Lime". In CIT2016. Congreso de Ingeniería del Transporte. Valencia: Universitat Politècnica València, 2016. http://dx.doi.org/10.4995/cit2016.2016.3451.

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Rice husk ash (RHA) is a by-product of rice milling. Its use as soil stabilizer is a way to replace the final disposal with environmental benefit. However, RHA is not cementitious itself but when mixed with lime forms cements which improve the soil properties. A research of performance of a silty sandy soil modified with RHA and lime as wearing course layer of low-volume roads was conducted through two full-scale test sections with different pavements built in Artigas, northern Uruguay. The alkaline reactivity of RHA is low because the husk burning is not controlled. The soil-RHA-lime mix design was conducted according to the Thompson’s Method. The pavement test sections were monitored through deflection measures by Benkelman beam and observations of surface condition. The deflections decreased over time in both test sections due to the development of cementation of the study materials. After one year, the dust emission was reduced, the wet skid resistance of pavement surfaces improved and there was not rutting. The researched pavements have had a good performance under the existing traffic and environmental conditions, demonstrating that wearing course layer of silty sand modified with RHA and lime is an alternative to improve the condition of low-volume roads and to replace the final disposal of RHA, with environmental, social and economic benefits.DOI: http://dx.doi.org/10.4995/CIT2016.2016.3451

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Kim, In Tai, Jayhyun Kwon e Erol Tutumluer. "Rutting of Airport Pavement Granular Layers". In Airfield Pavements Specialty Conference 2003. Reston, VA: American Society of Civil Engineers, 2004. http://dx.doi.org/10.1061/40711(141)22.

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"Part One: Bituminous and Cementitious Binders". In Proceedings of the Fourth European Symposium on Performance of Bituminous and Hydraulic Materials in Pavements, Bitmat 4. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2017. http://dx.doi.org/10.4324/9780203743928-2.

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Schwartz, Charles W., e Regis L. Carvalho. "Distribution of Permanent Deformations within HMA Layers". In Airfield and Highway Pavements 2008. Reston, VA: American Society of Civil Engineers, 2008. http://dx.doi.org/10.1061/41005(329)8.

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Hassan, K., A. Setyawan e S. Zoorob. "Effect of cementitious grouts on the properties of semi-flexible bituminous pavements". In Proceedings of the Fourth European Symposium on Performance of Bituminous and Hydraulic Materials in Pavements, Bitmat 4. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2017. http://dx.doi.org/10.4324/9780203743928-19.

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Saeed, Athar, e Michael I. Hammons. "Minimum Standards for Using Recycled Materials in Unbound Highway Pavement Layers". In Airfield and Highway Pavements 2008. Reston, VA: American Society of Civil Engineers, 2008. http://dx.doi.org/10.1061/41005(329)39.

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Godiwalla, Adil. "New Runway 15R-33L and Parallel Taxiway Complex Using Cement, Fly Ash and Blast Furnace Slag as Cementitious Material at Bush Intercontinental Airport of Houston". In Airfield Pavements Specialty Conference 2003. Reston, VA: American Society of Civil Engineers, 2004. http://dx.doi.org/10.1061/40711(141)5.

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Tota-Maharaj, Kiran, e Nichola Coleman. "Developing Novel Photocatalytic Cementitious Permeable Pavements for Depollution of Contaminants and Impurities in Urban Cities". In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.053.

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Photocatalyst such as Titanium Dioxide (TiO2) has been recently introduced as a nanoparticle into cementitious permeable pavements. Combining photocatalytic compounds within concrete permeable pavements can aid with depollution of several contaminants found in urban water streams and air impurities. This paper presents research carried out at the University of Greenwich, UK using photocatalytic concrete with varying percentages of TiO2 (0 %, 1% and 5%) to assess the levels depollution which can be achieved. Concrete samples were testing against the degradation of 2, 4-Dichlorophenoxyacetic Acid, a harmful chemical found in herbicides. This advanced oxidation process can aid in the reduction of urban pollution from an air and water perspective, improving sustainability for urban cities. Self-cleaning benefits of photocatalytic concrete permeable pavements can be used to keep urban infrastructure cleaner and more aesthetically pleasing. Experimental tests were carried out on the characterisation of inorganics through X-Ray diffraction and Fourier Transform Infrared Spectroscopy to ensure that the structures of the concrete samples were not altered by addition of the nanoparticles (photocatalyst). Experimental results were compared to that found in previous literature and confirmed that the addition of 5% TiO2 did not affect the structure of the concrete samples and can be a viable option used in urban infrastructure such as permeable pavements.

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Kim, In Tai, e Erol Tutumluer. "Rutting Evaluation of Airport Pavement Granular Layers Considering Stress History Effects". In Airfield and Highway Pavements Specialty Conference 2006. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40838(191)48.

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West, Randy C., Jason R. Moore e Jingna Zhang. "Evaluating Tack Coat Applications and the Bond Strength between Pavement Layers". In Airfield and Highway Pavements Specialty Conference 2006. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40838(191)49.

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Rapporti di organizzazioni sul tema "Pavements with cementitious layers"

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Roesler, Jeffery, Sachindra Dahal, Dan Zollinger e W. Jason Weiss. Summary Findings of Re-engineered Continuously Reinforced Concrete Pavement: Volume 1. Illinois Center for Transportation, maggio 2021. http://dx.doi.org/10.36501/0197-9191/21-011.

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This research project conducted laboratory testing on the design and impact of internal curing on concrete paving mixtures with supplementary cementitious materials and evaluated field test sections for the performance of crack properties and CRCP structure under environmental and FWD loading. Three experimental CRCP sections on Illinois Route 390 near Itasca, IL and two continuously reinforced concrete beams at UIUC ATREL test facilities were constructed and monitored. Erodibility testing was performed on foundation materials to determine the likelihood of certain combinations of materials as suitable base/subbase layers. A new post-tensioning system for CRCP was also evaluated for increased performance and cost-effectiveness. This report volume summarizes the three year research effort evaluating design, material, and construction features that have the potential for reducing the initial cost of CRCP without compromising its long-term performance.

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Ghavami, Masoud Seyed Mohammad, Maryam Sadat Hosseini, Pablo D. Zavattieri e John E. Haddock. Investigating the Need for Drainage Layers in Flexible Pavements. Purdue University, 2019. http://dx.doi.org/10.5703/1288284316881.

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Rudy, Adam, e Jan Olek. Optimization of Mixture Proportions for Concrete Pavements—Influence of Supplementary Cementitious Materials, Paste Content and Aggregate Gradation. Purdue University, dicembre 2012. http://dx.doi.org/10.5703/1288284315038.

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Sarker, Priyanka, e Erol Tutumluer. A Stress-history-based Approach for Predicting Deformation Potentials of Granular Base and Subbase Layers in Airport Pavements. Illinois Center for Transportation, luglio 2020. http://dx.doi.org/10.36501/0197-9191/20-013.

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Qamhia, Issam, e Erol Tutumluer. Review of Improved Subgrade and Stabilized Subbases to Evaluate Performance of Concrete Pavements. Illinois Center for Transportation, maggio 2021. http://dx.doi.org/10.36501/0197-9191/21-016.

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This report presents findings on the evaluation of foundation layers under concrete pavements in the state of Illinois. It also provides recommendations and scenarios where unbound granular layers can be safely used under concrete pavements as economical and well-performing subbase layers. The current practice and mechanistic design methods for constructing concrete pavements in Illinois was first evaluated, including historical studies that led to the current design procedures and policies. The performance of concrete pavements with unbound granular layers in Illinois were then evaluated, and several case studies of well-performing concrete pavements with granular subbases, high traffic levels, and low distress levels and severity were realized. Next, the practices of surrounding states were evaluated, and several Midwest states, i.e., Wisconsin, Minnesota, Iowa, and Michigan, were found to regularly use unbound granular layers under concrete pavements with no issues. A literature review on the most recent requirements and recommendations for designing granular subbases under concrete pavements was then presented. It is concluded that subbase layers under concrete pavements are mainly used to provide uniform support and prevent pumping. Based on the case study evaluations and literature, a stable, drainable, and durable daylighted granular subbase design is recommended for traffic factors up to 10.0. Stability is ensured by limiting the ratio of gravel-to-sand fractions in the aggregate mix between 1.3 and 1.9. Drainability requirements can be met by limiting the percentage of fines passing the No. 200 sieve (0.075 mm) to 4% and by checking the quality of drainage is at least fair based on the time required to drain 50% of the water. Lastly, a geotextile fabric is recommended for use below the granular subbase for separation to ensure drainability throughout design life.

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Qamhia, Issam, e Erol Tutumluer. Evaluation of Geosynthetics Use in Pavement Foundation Layers and Their Effects on Design Methods. Illinois Center for Transportation, agosto 2021. http://dx.doi.org/10.36501/0197-9191/21-025.

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This report presents findings of a research effort aimed at reviewing and updating existing Illinois Department of Transportation (IDOT) specifications and manuals regarding the use of geosynthetic materials in pavements. The project consisted of three tasks: evaluate current IDOT practice related to the use of geosynthetics; review research and state of the practice on geosynthetics applications, available products, design methods, and specifications; and propose recommendations for geosynthetic solutions in pavements to modernize IDOT’s practices and manuals. The review of IDOT specifications revealed that geotextiles are the most used geosynthetic product in Illinois, followed by geogrids. Several of IDOT’s manuals have comprehensive guidelines to properly design and construct pavements with geosynthetics, but several knowledge gaps and potential areas for modernization and adoption of new specifications still exist. Based on the review of the available design methods and the most relevant geosynthetic properties and characterization methods linked to field performance, several updates to IDOT’s practice were proposed. Areas of improvement are listed as follows. First, establish proper mechanisms for using geogrids, geocells, and geotextiles in subgrade restraint and base stabilization applications. This includes using shear wave transducers, i.e., bender elements, to quantify local stiffness enhancements and adopting the Giroud and Han design method for subgrade restraint applications. Second, update IDOT’s Subgrade Stability Manual to include property requirements for geogrids, geotextiles, and geocells suitable for subgrade restraint applications. Third, establish proper standards on stabilization, separation, and pumping resistance for geotextiles by incorporating recent research findings on geotextile clogging and permeability criteria. Fourth, promote the use of modern geosynthetic products, such as geotextiles with enhanced lateral drainage, and fifth, elaborate on proper methods for construction/quality control measures for pavements with geosynthetics.

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Lomboy, Gilson, Douglas Cleary, Seth Wagner, Yusef Mehta, Danielle Kennedy, Benjamin Watts, Peter Bly e Jared Oren. Long-term performance of sustainable pavements using ternary blended concrete with recycled aggregates. Engineer Research and Development Center (U.S.), maggio 2021. http://dx.doi.org/10.21079/11681/40780.

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Dwindling supplies of natural concrete aggregates, the cost of landfilling construction waste, and interest in sustainable design have increased the demand for recycled concrete aggregates (RCA) in new portland cement concrete mixtures. RCA repurposes waste material to provide useful ingredients for new construction applications. However, RCA can reduce the performance of the concrete. This study investigated the effectiveness of ternary blended binders, mixtures containing portland cement and two different supplementary cementitious materials, at mitigating performance losses of concrete mixtures with RCA materials. Concrete mixtures with different ternary binder combinations were batched with four recycled concrete aggregate materials. For the materials used, the study found that a blend of portland cement, Class C fly ash, and blast furnace slag produced the highest strength of ternary binder. At 50% replacement of virgin aggregates and ternary blended binder, some specimens showed comparable mechanical performance to a control mix of only portland cement as a binder and no RCA substitution. This study demonstrates that even at 50% RCA replacement, using the appropriate ternary binder can create a concrete mixture that performs similarly to a plain portland cement concrete without RCA, with the added benefit of being environmentally beneficial.

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Weiss, W. Jason, Chunyu Qiao, Burkan Isgor e Jan Olek. Implementing Rapid Durability Measure for Concrete Using Resistivity and Formation Factor. Purdue University, 2020. http://dx.doi.org/10.5703/1288284317120.

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The durability of in-place concrete is a high priority issue for concrete pavements and bridges. Several studies have been conducted by INDOT to use electrical resistivity as a measure of fluid transport properties. Resistivity is dependent on the chemistry of the cement and supplementary cementitious system used, as such it has been recommended that rather than specifying resistivity it may be more general to specify the formation factor. Samples were tested to establish the current levels of performance for concrete pavements in the state of Indiana. Temperature and moisture corrections are presented and acceptable accelerated aging procedure is presented. A standardized testing procedure was developed (AASHTO TP 119–Option A) resulting in part from this study that provides specific sample conditioning approaches to address pore solution composition, moisture conditioning, and testing procedures. An accelerated aging procedure is discussed to obtain later age properties (91 days) after only 28 days.

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Carruth, William D. Evaluation of In-Place Asphalt Recycling for Airfield Applications. Engineer Research and Development Center (U.S.), luglio 2021. http://dx.doi.org/10.21079/11681/41142.

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Over the last few decades, in-place recycling of asphalt pavements has seen increased use by the highway industry, primarily to take a dvantage of potential cost and logistical savings compared to conventional reconstruction. More recently, the U.S. Navy and Federal Aviation Administration have allowed recycling to be used on airfields with lighter traffic. This report contains a discussion of in-place recycling design considerations obtained from a literature review of its use in the highway industry. Observations developed from a review of airfield pavement projects that have utilized recycling is also included. A structural analysis was performed using the Pavement-Transportation Computer Assisted Structural Engineering (PCASE) tool to determine typical stiffness values that recycled layers must achieve to support various types of military aircraft traffic for different pavement structures. Overall, in-place recycling is recommended for consideration as a rehabilitati on technique for military airfield pavements, and further investigation is recommended before it is implemented it into design guidance.

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