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The Development Of Asphalt Mix Creep Parameters And Finite Element Modeling Of Asphalt Rutting
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Book Synopsis The Development of Asphalt Mix Creep Parameters and Finite Element Modeling of Asphalt Rutting by : Ludomir Uzarowski
Download or read book The Development of Asphalt Mix Creep Parameters and Finite Element Modeling of Asphalt Rutting written by Ludomir Uzarowski and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Rutting Potential in Asphalt Mixes Using Finite Element Modeling by :
Download or read book Evaluation of Rutting Potential in Asphalt Mixes Using Finite Element Modeling written by and published by . This book was released on 2003 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quality of asphalt mix (HMA) is one of the main factors that affects the flexible pavement performance. Use of poor quality mix and finding their consequences through pavement performance evaluation is often too costly. Therefore, the remedy is to evaluate the quality of the mix at the design stage of a project. In recent years, performance-based testing has gained popularity so that problematic mixes can be identified and eliminated. Asphalt Pavement Analyzer (APA) has been successfully used in recent years for evaluation of permanent deformation or rutting in both hot mix and cold mix asphalt specimens. In view of layered pavement systems encountered in practice, three-dimensional finite element models (FEM) can be used to relate the APA test results with the in-service performance of the pavement. The primary objectives of this study are to develop a finite element model to simulate the laboratory testing of asphalt mixes in APA for rutting and to relate the test results to basic material properties. For the covering abstract of this conference see ITRD number E211395.
Book Synopsis Using Image-based Multi-scale Finite Element Model to Predict Rutting Behavior of Asphalt Mixtures by : Cheng Ling
Download or read book Using Image-based Multi-scale Finite Element Model to Predict Rutting Behavior of Asphalt Mixtures written by Cheng Ling and published by . This book was released on 2016 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rutting resistance is one of the essential needs in design of asphalt mixtures. Volumetric properties, and wheel tracking tests are used today to qualify the rutting resistance in practice. However, these tools are used on a trial and error basis and are mostly based on experience. With all the experience available today it is still not clear what is the contribution of aggregate structure and if plastomeric or elastomeric modifiers are preferred for better resistance. While expanding the types of aggregates and binders used in testing could help, a more fundamental understanding of how aggregate contacts are formed and how binders can contribute to actual mechanics of rutting resistance is a better path for designing of mixtures. In the last decade significant improvement in imaging and multi-scale modeling has been achieved, which allows looking closer at how binders and aggregates could affect rutting resistance. One of the most challenging aspects of this modeling effort is dealing with aggregates proximity zones and how response of mixture changes when aggregates come into contact. This dissertation includes a modification of an Image-based Finite Element model for addressing this challenge and provide a solution that is simple yet effective in better simulating of rutting resistance of asphalt mixtures. The dissertation also includes validation of the model to simulate measured performance of mixtures produced with plastomeric and elastomeric modifiers with different viscoelastic properties, as well as different aggregate gradations. Results indicate that predefined contact points are necessary for reliable prediction of rutting resistance of mixtures. The results also show that the non-recoverable creep compliance of binders plays a significant role, while elasticity of modified binder is not important. Further application of the model shows that it can be successfully used to simulate effects of mixture confining pressure to simulate pavement depth, and also to simulate effects of varying voids content and moisture damage due to the weakening of the interface bond between aggregates and binder. It is expected that the improved modeling of contact zones will allow a more rational selection of aggregates and modification techniques to enhance the rutting resistance of asphalt pavement.
Book Synopsis CIGOS 2019, Innovation for Sustainable Infrastructure by : Cuong Ha-Minh
Download or read book CIGOS 2019, Innovation for Sustainable Infrastructure written by Cuong Ha-Minh and published by Springer Nature. This book was released on 2019-10-10 with total page 1264 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents selected articles from the 5th International Conference on Geotechnics, Civil Engineering Works and Structures, held in Ha Noi, focusing on the theme “Innovation for Sustainable Infrastructure”, aiming to not only raise awareness of the vital importance of sustainability in infrastructure development but to also highlight the essential roles of innovation and technology in planning and building sustainable infrastructure. It provides an international platform for researchers, practitioners, policymakers and entrepreneurs to present their recent advances and to exchange knowledge and experience on various topics related to the theme of “Innovation for Sustainable Infrastructure”.
Book Synopsis Contributions of Pavement Structural Layers to Rutting of Hot Mix Asphalt Pavements by : Thomas D. White
Download or read book Contributions of Pavement Structural Layers to Rutting of Hot Mix Asphalt Pavements written by Thomas D. White and published by Transportation Research Board. This book was released on 2002 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advanced Technologies, Systems, and Applications III by : Samir Avdaković
Download or read book Advanced Technologies, Systems, and Applications III written by Samir Avdaković and published by Springer. This book was released on 2018-11-03 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces innovative and interdisciplinary applications of advanced technologies. Featuring the papers from the 10th DAYS OF BHAAAS (Bosnian-Herzegovinian American Academy of Arts and Sciences) held in Jahorina, Bosnia and Herzegovina on June 21–24, 2018, it discusses a wide variety of engineering and scientific applications of the different techniques. Researchers from academic and industry present their work and ideas, techniques and applications in the field of power systems, mechanical engineering, computer modelling and simulations, civil engineering, robotics and biomedical engineering, information and communication technologies, computer science and applied mathematics.
Book Synopsis MODELING OF ASPHALT CONCRETE by : Y. Richard Kim
Download or read book MODELING OF ASPHALT CONCRETE written by Y. Richard Kim and published by McGraw Hill Professional. This book was released on 2007-09-22 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: An Expert Guide to Developing More-Durable and Cost-Effective Asphalt Pavements Written by distinguished experts from countries around the world, Modeling of Asphalt Concrete presents in-depth coverage of the current materials, methods, and models used for asphalt pavements. Included is state-of-the-art information on fundamental material properties and mechanisms affecting the performance of asphalt concrete, new rheological testing and analysis techniques, constitutive models, and performance prediction methodologies for asphalt concrete and asphalt pavements. Emphasis is placed on the modeling of asphalt mixes for specific geographic/climatic requirements. In light of America's crumbling infrastructure and our heavy usage of asphalt as a paving material, this timely reference is essential for the development of more-durable and cost-effective asphalt materials for both new construction and rehabilitation. Harness the Latest Breakthroughs in Asphalt Concrete Technology: • Asphalt Rheology • Constitutive Models • Stiffness Characterization • Models for Low-Temperature Cracking • Models for Fatigue Cracking and Moisture Damage • Models for Rutting and Aging
Book Synopsis Mechanics of Asphalt: Microstructure and Micromechanics by : Linbing Wang
Download or read book Mechanics of Asphalt: Microstructure and Micromechanics written by Linbing Wang and published by McGraw Hill Professional. This book was released on 2010-10-08 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: A State-of-the-Art Guide to the Mechanics of Asphalt Concrete Mechanics of Asphalt systematically covers both the fundamentals and most recent developments in applying rational mechanics, microstructure characterization methods, and numerical tools to understand the behavior of asphalt concrete (AC). The book describes the essential mathematics, mechanics, and numerical techniques required for comprehending advanced modeling and simulation of asphalt materials and asphalt pavements. Filled with detailed illustrations, this authoritative volume provides rational mechanisms to guide the development of best practices in mix design, construction methods, and performance evaluation of asphalt concrete. Mechanics of Asphalt covers: Fundamentals for mathematics and continuum mechanics Mechanical properties of constituents, including binder, aggregates, mastics, and mixtures Microstructure characterization Experimental methods to characterize the heterogeneous strain field Mixture theory and micromechanics applications Fundamentals of phenomenological models Multiscale modeling and moisture damage Models for asphalt concrete, including viscoplasticity, viscoplasticity with damage, disturbed state mechanics model, and fatigue failure criteria Finite element method, boundary element method, and discrete element method Digital specimen and digital test-integration of microstructure and simulation Simulation of asphalt compaction Characterization and modeling of anisotropic properties of asphalt concrete
Book Synopsis Contributions of Pavement Structural Layers to Rutting of Hot Mix Asphalt Pavements by : Thomas D. White
Download or read book Contributions of Pavement Structural Layers to Rutting of Hot Mix Asphalt Pavements written by Thomas D. White and published by Transportation Research Board. This book was released on 2002 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modeling of Hot-mix Asphalt Compaction by :
Download or read book Modeling of Hot-mix Asphalt Compaction written by and published by . This book was released on 2010 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Compaction is the process of reducing the volume of hot-mix asphalt (HMA) by the application of external forces. As a result of compaction, the volume of air voids decreases, aggregate interlock increases, and interparticle friction increases. The quality of field compaction of HMA is one of the most important elements influencing asphalt pavement performance. Poor compaction has been associated with asphalt bleeding in hot weather, moisture damage, excessive aging and associated cracking, and premature permanent deformation. This study was conducted to develop a model within the context of a thermomechanical framework for the compaction of asphalt mixtures. The asphalt mixture was modeled as a nonlinear compressible material exhibiting time-dependent properties. A numerical scheme based on finite elements was employed to solve the equations governing compaction mechanisms. The material model was implemented in the Computer Aided Pavement Analysis (CAPA-3D) finite-element (FE) package. Due to the difficulty of conducting tests on the mixture at the compaction temperature, a procedure was developed to determine the model's parameters from the analysis of the Superpave® gyratory compaction curves. A number of mixtures were compacted in the Superpave® gyratory compactor using an angle of 1.25 degrees in order to determine the model's parameters. Consequently, the model was used to predict the compaction curves of mixtures compacted using a 2-degree angle of gyration. The model compared reasonably well with the compaction curves. FE simulations of the compaction of several pavement sections were conducted in this study. The results demonstrated the potential of the material model to represent asphalt mixture field compaction. The developed model is a useful tool for simulating the compaction of asphalt mixtures under laboratory and field conditions. In addition, it can be used to determine the influence of various material properties and mixture designs on the model's parameters and mixture compactability.
Book Synopsis Micromechanical and Probabilistic Approaches to Improve Asphalt Concrete Rutting Performance Prediction Procedures by : Erdem Coleri
Download or read book Micromechanical and Probabilistic Approaches to Improve Asphalt Concrete Rutting Performance Prediction Procedures written by Erdem Coleri and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Rutting is the load induced permanent deformation of pavements with asphalt concrete (AC) layers. Rutting can occur in the unbound layers of the pavement and in the AC surface layers, the latter of which is the focus of this thesis. The risk of rutting in the AC layers is highest just after construction and then generally diminishes as the materials harden due to traffic and environmental aging. AC rutting has a large impact on life cycle cost because it mostly occurs at the beginning of the life cycle and because failure by rutting often requires removal and replacement of the affected layers or other costly remedial construction, which makes rutting a crucial consideration. Although rutting performance of AC pavements has been characterized by various studies, there has been little study of the effects of AC micromechanical structure on in-situ rutting deformation accumulation mechanisms. In addition, the analysis of the predicted pavement performance variability and the development of a reliability-based design method considering all significant sources of variability have been lacking. The goal of this thesis was to explain the rutting accumulation mechanisms for pavements with conventional and modified asphalt mixes and develop a comprehensive rutting performance prediction procedure considering the fundamental material properties, in-situ deformation accumulation mechanisms and the effects of various sources of variability, based on investigation of the fundamental problems in current test methods, structural models and performance prediction procedures. An innovative method was developed to quantify the precision and bias in repeated simple shear test at constant height (RSST-CH) laboratory test results for specimens with different dimensions and to determine the effects of variability on predicted rutting performance. Specimen size requirements for two different asphalt mix types were proposed based on the results of the analysis. The effects of test temperature and specimen volume on test variability were also investigated. A reliability based rutting performance prediction procedure was developed that considers the variability in laboratory test results, layer thicknesses, stiffnesses, and measured in-situ performance. The effects of input design parameter variability on predicted performance were determined using the calculated distributions of calibration coefficients. By using these calibration coefficient distributions, asphalt layer design thicknesses for different reliability levels can be predicted without performing computationally intensive calculations, such as Monte Carlo simulations, facilitating incorporation of reliability into design software. The general procedure developed for specific tests and AC rutting in this thesis can be applied to other distresses. The use of X-ray computed tomography (CT) images was extended from previous work in a new empirical approach developed to investigate the changes in AC microstructure caused by full-scale accelerated pavement testing with a Heavy Vehicle Simulator (HVS), by using images taken before and after HVS rut tests. A viscoelastic micromechanical finite element model was also developed to investigate effects of binder and aggregate properties on shear resistance using the microstructural model developed from the imaging process with laboratory specimens. The approach was used to investigate the differences in performance under full-scale loading of two mixes, one dense graded with polymer modified binder and the other gap-graded with rubberized binder. It was found that shear related deformation appeared to control the long term rutting performance of the AC pavement layers while densification was primarily an initial contributor at the very early stages of the trafficking. A high concentration of aggregate interlock in the polymer modified mix, as a result of the dense gradation and larger aggregate sizes, appears to have resulted in greater dissipation of shear stresses and therefore greater shear resistance. The lack of this interlocking effect for the rubberized gap-graded mix is proposed to have caused the earlier failure in the full-scale HVS test sections. Important differences in aggregate movement and air-void changes were also observed between different overlay thicknesses indicating the depth of the rut phenomenon, important information for the design of overlays on aged AC as well as for asphalt overlays on concrete pavements. Recommendations are proposed to improve design and construction of asphalt surfaced pavements based on these findings.
Book Synopsis Asphalt Concrete Mix Design by : William Gartner
Download or read book Asphalt Concrete Mix Design written by William Gartner and published by ASTM International. This book was released on 1989 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Improved Prediction of Performance of Asphalt Mixes Using a Creep Constitutive Model by : Lance Alan Roberts
Download or read book Improved Prediction of Performance of Asphalt Mixes Using a Creep Constitutive Model written by Lance Alan Roberts and published by . This book was released on 2014 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project investigated the application of the Brazilian indirect tension strength, constant mean stress, static triaxial compression, and static triaxial creep tests for testing asphalt mixes. Two different asphalt mixes, provided by the South Dakota Department of Transportation (SDDOT), were subjected to the laboratory testing program. Initially, the testing program was to provide the necessary data to conduct advanced viscoplastic modeling of asphalt pavement using finite element software. However, the time-dependent behavior of the asphalt mixes was more complex than anticipated and fitting of the creep test data to a constitutive model was not possible. Instead, the results of the testing program were used to demonstrate a qualitative approach to determine the potential performance of an asphalt mix. In addition, comparing the performance between the two asphalt mixes was accomplished. Recommendations are provided for conducting specific additional testing to further understand how such a program could be used to qualitatively predict asphalt pavement performance.
Book Synopsis Verification of Mechanistic Prediction Models for Permanent Deformation in Asphalt Mixes Using Accelerated Pavement Testing by : Mbakisya A. Onyango
Download or read book Verification of Mechanistic Prediction Models for Permanent Deformation in Asphalt Mixes Using Accelerated Pavement Testing written by Mbakisya A. Onyango and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Permanent deformation (rutting) is the most critical load-associated distress that develops on asphalt pavements significantly affecting their performance. Past research work focused on estimating permanent deformation of asphalt mixes using empirical prediction models or prediction models based on linear elastic material models. In recent years, mechanistic and mechanistic-empirical prediction models have been developed to take into account the behavior of asphalt material (viscoelastic, viscoplastic or elasto-visco-plastic). This research project aims to evaluate existing mechanistic models that predict permanent deformation (rutting) in asphalt mixes by comparing computed permanent deformation to that measured in a full-scale accelerated pavement test. Six pavement sections were constructed in the Civil Infrastructure Systems Laboratory (CISL) of Kansas State University with six different asphalt mixes. The sections were loaded with up to 700,000 load repetitions of a 22,000lb single axle. The transverse profiles at the pavement surface were measured periodically. For material characterization, asphalt mix samples fabricated in the laboratory, were subjected to dynamic modulus (E*), static creep - flow time (Ft), dynamic creep - flow number (Fn), triaxial and uniaxial strength tests, repetitive shear at constant height (RSCH) and frequency sweep at constant height (FSCH). The finite element software, Abaqus, was used to simulate and evaluate four permanent deformation prediction models, which are: creep model, elasto-visco-plastic model, viscoelastic model and Drucker-Prager model. The predicted permanent deformation was then compared to permanent deformation measured in CISL for the six of asphalt pavement sections. It was found that, with some improvements, creep and elasto-visco-plastic models could be used to predict permanent deformation in asphalt mixes. The viscoelastic model greatly under-predict permanent deformation, and the Drucker-Prager model with hardening criteria over predicts permanent deformation as compared to values measured in CISL.
Book Synopsis Advances in Road Infrastructure and Mobility by : Amin Akhnoukh
Download or read book Advances in Road Infrastructure and Mobility written by Amin Akhnoukh and published by Springer Nature. This book was released on 2022-04-21 with total page 1211 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume focuses on recent advances in the planning, design, construction and management of new and existing roads with a particular focus on safety, sustainability and resilience. It discusses field experience through case studies and pilots presented by leading international subject-matter specialists. Chapters were selected from the 18th International Road Federation World Meeting & Exhibition, Dubai 2021.
Book Synopsis Advances in Materials and Pavement Prediction by : Eyad Masad
Download or read book Advances in Materials and Pavement Prediction written by Eyad Masad and published by CRC Press. This book was released on 2018-07-16 with total page 879 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Materials and Pavement Performance Prediction contains the papers presented at the International Conference on Advances in Materials and Pavement Performance Prediction (AM3P, Doha, Qatar, 16- 18 April 2018). There has been an increasing emphasis internationally in the design and construction of sustainable pavement systems. Advances in Materials and Pavement Prediction reflects this development highlighting various approaches to predict pavement performance. The contributions discuss links and interactions between material characterization methods, empirical predictions, mechanistic modeling, and statistically-sound calibration and validation methods. There is also emphasis on comparisons between modeling results and observed performance. The topics of the book include (but are not limited to): • Experimental laboratory material characterization • Field measurements and in situ material characterization • Constitutive modeling and simulation • Innovative pavement materials and interface systems • Non-destructive measurement techniques • Surface characterization, tire-surface interaction, pavement noise • Pavement rehabilitation • Case studies Advances in Materials and Pavement Performance Prediction will be of interest to academics and engineers involved in pavement engineering.
Author :Robert L. Lytton Publisher :Strategic Highway Research Program (Shrp) ISBN 13 :9780309056175 Total Pages :500 pages Book Rating :4.0/5 (561 download)
Book Synopsis Development and Validation of Performance Prediction Models and Specifications for Asphalt Binders and Paving Mixes by : Robert L. Lytton
Download or read book Development and Validation of Performance Prediction Models and Specifications for Asphalt Binders and Paving Mixes written by Robert L. Lytton and published by Strategic Highway Research Program (Shrp). This book was released on 1993 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: A result of the Strategic Highway Research Program's asphalt research is the development of performance-based specifications for asphalt binders and mixtures to control 3 distress modes: rutting; fatigue cracking; and thermal cracking. The SHRP A-005 project developed detailed pavement performance models to support these binder and mixture specifications and performance-based mixture designs. This report documents the findings of this extensive research effort and provides supporting data for the performance-based specifications and mixture design procedure called SUPERPAVE. The A-005 contract developed and used a sophisticated, mechanistic-based pavement performance model to define the relationships between asphalt binder and mixture properties and pavement distress. A comprehensive pavement performance model was developed that predicts the amount of fatigue cracking, thermal cracking and rutting in asphalt concrete pavements with time, using results from the accelerated laboratory tests. The pavement performance models for each distress were also used to confirm the relevant binder and mixture properties established by other SHRP contractors. The model has 3 parts: a mixture evaluation model; a pavement response model; and a pavement distress model.
