Characterization Of Strain Rate And Temperature Dependent Shear Properties Of Asphalt Mixtures
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Characterization Of Strain Rate And Temperature Dependent Shear Properties Of Asphalt Mixtures
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Author : Qiang Li
language : en
Publisher:
Release Date : 2014
Characterization Of Strain Rate And Temperature Dependent Shear Properties Of Asphalt Mixtures written by Qiang Li and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with Asphalt mixture categories.
Shear properties (cohesion and angle of internal friction) are the main material parameters for the rutting evaluation of asphalt mixtures. The strain rate and temperature dependency of shear properties was characterized for three mixtures based on the time-temperature superposition principle (TTSP). The unconfined compression and indirect tension dynamic modulus tests were performed to measure the linear viscoelastic properties of asphalt mixtures by a modified procedure. The uniaxial compression strength test and indirect tension strength test were conducted at three temperatures and four strain rates to calculate shear properties of asphalt mixtures based on the Mohr-Coulomb failure theory. The strength and shear property master curves were developed using the shift factor obtained from the dynamic modulus tests. The analysis results show that TTSP is still valid for asphalt concrete in the damage state regardless of failure modes. The effect of confining pressure on shift factors can be evaluated by the Fillers-Moonan-Tschoegl (FMT) model. The mixture strength and shear properties exhibit a significant temperature and time dependency. The modified cross model can be used to describe the strength and cohesion master curves after slight improvement. Shear property master curves show preliminary promise for use in optimizing material design and improving the accuracy of rutting prediction.
Characterization Of Hot Mixture Asphalt Shear Resistance And Correlation With Rutting Performance
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Author : Murat Guler
language : en
Publisher:
Release Date : 2002
Characterization Of Hot Mixture Asphalt Shear Resistance And Correlation With Rutting Performance written by Murat Guler and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
Using Mastic Characterization To Predict Asphalt Mixture Low Temperature Cracking Behavior
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Author :
language : en
Publisher:
Release Date : 2015
Using Mastic Characterization To Predict Asphalt Mixture Low Temperature Cracking Behavior written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
Low temperature performance grading currently relies solely on Bending Beam Rheometer (BBR) for determining low temperature creep stiffness (S) and rate of modulus relaxation (m-value) at 60s, both determined at low stress-strain levels, in the pre-failure zones. This aspect raises questions with regard to applicability of properties derived from the linear viscoelastic range for prediction of asphalt binder thermal cracking behavior. Furthermore, many researchers have reported a discrepancy between field cracking severity and predictions based on asphalt binder properties since the asphalt binder-aggregate interaction is non-existent in asphalt binder testing. Therefore evaluation of asphalt mastics properties which could save a considerable amount of time and equipment in comparison to mixture testing should be prioritized. These challenges indicate that considering fracture properties of asphalt mastics could be a better approach for prediction of thermal cracking in asphalt pavements. It is believed that development of failure master curves for the damage characterization of asphalt mastics at different temperatures and loading rates would be beneficial for better characterization of resistance to thermal cracking. Therefore, in this dissertation a mechanistic approach on the development of such asphalt mastic failure master curves was derived using the new BBR-SENB test for damage resistance characterization. The complexity of the viscoelastic behavior of asphalt mastics in terms of time and temperature dependency is also recognized by the sensitivity of the failure properties to changes in loading time and temperature. This dissertation documents the development, calibration, and validation of a fundamental analysis framework of asphalt mixtures thermal cracking behavior using asphalt mastics as the continuous phase of these mixtures. Key conceptual components of this study include applying time temperature superposition principles to large strain failure properties, development of asphalt mastic failure master curves, and investigating relationship between mastic viscosity and aggregate structure of asphalt mixtures in the context of thermo-volumetric properties of mixtures. An analysis framework for predicting thermal cracking of asphalt mixtures was developed which include considering asphalt mastics, aggregate internal structure and temperature dependent thermo-volumetric properties. Results where compared to experimental data measured using the ATCA device, which allowed measuring strain and stress build up during cooling.
Rate And Temperature Dependent Fracture Characteristics Of Asphaltic Paving Mixtures
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Author : Soohyok Im
language : en
Publisher:
Release Date : 2013
Rate And Temperature Dependent Fracture Characteristics Of Asphaltic Paving Mixtures written by Soohyok Im and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Asphalt categories.
Cracking in asphaltic pavement layers causes primary failure of the roadway structure, and the fracture resistance and characteristics of asphalt mixtures significantly influence the service life of asphaltic roadways. A better understanding of the fracture process is considered a necessary step to the proper development of design-analysis procedures for asphaltic mixtures and pavement structures. However, such effort involves many challenges because of the complex nature of asphaltic materials. In this study, experiments were conducted using uniaxial compressive specimens to characterize the linear viscoelastic properties and semi-circular bending (SCB) specimens to characterize fracture behavior of a typical dense-graded asphalt paving mixture subjected to various loading rates and at different temperatures. The SCB fracture test was also incorporated with a digital image correlation (DIC) system and finite-element model simulations including material viscoelasticity and cohesive-zone fracture to effectively capture local fracture processes and resulting fracture properties. The test results and model simulations clearly demonstrate that: (1) the rate- and temperature-dependent fracture characteristics need to be identified at the local fracture process zone, and (2) the rate- and temperature-dependent fracture properties are necessary in the structural design of asphaltic pavements with which a wide range of strain rates and service temperatures is usually associated.
Engineering Properties Of Asphalt Mixtures And The Relationship To Their Performance
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Author : Gerald A. Huber
language : en
Publisher: ASTM International
Release Date : 1995
Engineering Properties Of Asphalt Mixtures And The Relationship To Their Performance written by Gerald A. Huber and has been published by ASTM International this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Asphalt emulsion mixtures categories.
Thirteen papers presented at the conference on [title], held in Phoenix, Arizona, December, 1994, discuss the products of the strategic highway research program, the Superpave method of mix design, and test methods for fatigue cracking and permanent deformation. Lacks an index. Annotation c. by Book
Behavior Of Asphalt Concrete Mixtures In Triaxial Compression
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Author : S-A Tan
language : en
Publisher:
Release Date : 1994
Behavior Of Asphalt Concrete Mixtures In Triaxial Compression written by S-A Tan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Asphalt categories.
The triaxial compression test is one of the most common standard tests for determining the stress-strain behavior and strength parameters of soils under drained and undrained conditions. The use of the test method in asphaltic mixtures is less well known and seldom practiced. This paper describes the use of the triaxial compression test for asphaltic mixtures for determining their engineering properties such as the friction angle ?, the cohesion, c, and the elastic compression modulus, E. Effects of test temperatures, strain rate, and confining pressures on the compressive behavior of asphalt concrete were studied. The results showed that the friction angle is primarily a function of aggregate friction and interlocking, being independent of test temperature and strain rate. The cohesion, on the other hand, is largely dependent on the binder and fines mixture being sensitive to both test temperature and strain rate changes. The confining pressures have no influence on c and ?, but have significant influence on the compression modulus. E. The tests can be conducted at controlled temperatures, constant strain-rate, and confining pressures so as to allow the determination of the basic engineering stress-strain and strength properties of these materials under controlled environmental conditions. Using these properties, a constitutive plasticity model based on the Drucker-Prager yield condition can then be applied in an axisymmetric finite element model to describe the mechanical behavior of the asphaltic material in triaxial compression. Analysis shows that the plasticity model is able to describe the stress-strain behavior of the triaxial specimen to failure, predicting both the failure strain and the failure stress fairly accurately. Comparison of analysis with measured lateral deformation at failure also show good agreement. Thus it seems that a simple idealized elastic-perfectly-plastic constitutive model, whose parameters can be determined from a triaxial compression test at constant strain-rate, is adequate to describe the behavior of asphaltic mixtures, loaded in compression to failure.
Deformation And Volume Change Characteristics Of A Sand Asphalt Mixture Under Constant Direct And Triaxial Compressive Stresses
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Author : Yang Hsien Huang
language : en
Publisher:
Release Date : 1968
Deformation And Volume Change Characteristics Of A Sand Asphalt Mixture Under Constant Direct And Triaxial Compressive Stresses written by Yang Hsien Huang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Asphalt emulsion mixtures categories.
8th Rilem International Symposium On Testing And Characterization Of Sustainable And Innovative Bituminous Materials
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Author : Francesco Canestrari
language : en
Publisher: Springer
Release Date : 2015-09-24
8th Rilem International Symposium On Testing And Characterization Of Sustainable And Innovative Bituminous Materials written by Francesco Canestrari and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-09-24 with Technology & Engineering categories.
This work presents the results of RILEM TC 237-SIB (Testing and characterization of sustainable innovative bituminous materials and systems). The papers have been selected for publication after a rigorous peer review process and will be an invaluable source to outline and clarify the main directions of present and future research and standardization for bituminous materials and pavements. The following topics are covered: - Characterization of binder-aggregate interaction - Innovative testing of bituminous binders, additives and modifiers - Durability and aging of asphalt pavements - Mixture design and compaction analysis - Environmentally sustainable materials and technologies - Advances in laboratory characterization of bituminous materials - Modeling of road materials and pavement performance prediction - Field measurement and in-situ characterization - Innovative materials for reinforcement and interlayer systems - Cracking and damage characterization of asphalt pavements - Recycling and re-use in road pavements This is the proceedings of the RILEM SIB2015 Symposium (Ancona, Italy, October 7-9, 2015).
Physical Properties Of Asphalt Cement Binders
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Author : John C. Hardin
language : en
Publisher: ASTM International
Release Date : 1995
Physical Properties Of Asphalt Cement Binders written by John C. Hardin and has been published by ASTM International this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Asphalt cement categories.
A dozen papers from a December 1993 symposium in Dallas/Fort Worth, Texas. Among the topics are why the new proposed rheological properties of asphalt binders are required and how they compare to conventional properties, the development and use of the SHRP direct tension specification test, oxidatio
Binder Characterization And Evaluation Test Methods
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Author :
language : en
Publisher:
Release Date : 1994
Binder Characterization And Evaluation Test Methods written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Asphalt categories.