Evaluation Of Hot Mix Asphalt Hma Static Creep And Repeated Load Tests
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Evaluation Of Hot Mix Asphalt Hma Static Creep And Repeated Load Tests
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Author : Jay R Gabrielson
language : en
Publisher:
Release Date : 1992
Evaluation Of Hot Mix Asphalt Hma Static Creep And Repeated Load Tests written by Jay R Gabrielson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Concrete categories.
Performance Tests For Hot Mix Asphalt Hma Including Fundamental And Empirical Procedures
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Author : Louay Nadhim Mohammad
language : en
Publisher: ASTM International
Release Date : 2006
Performance Tests For Hot Mix Asphalt Hma Including Fundamental And Empirical Procedures written by Louay Nadhim Mohammad and has been published by ASTM International this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Anisotropy categories.
Rutting Performance Of Airport Hot Mix Asphalt Characterized By Laboratory Performance Testing Full Scale Accelerated Pavement Testing And Finite Element Modeling
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Author : John Ford Rushing
language : en
Publisher:
Release Date : 2015
Rutting Performance Of Airport Hot Mix Asphalt Characterized By Laboratory Performance Testing Full Scale Accelerated Pavement Testing And Finite Element Modeling written by John Ford Rushing 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.
Hot Mix Asphalt (HMA) laboratory mixture design is intended to provide a durable, rut-resistant mixture for a given traffic type. Current mixture design procedures using the Superpave Gyratory Compactor (SGC) rely on volumetric properties of the compacted mixture to assure reliable performance; however, a definitive performance test does not exist. This study provides guidance for selecting a laboratory performance test for airport HMA mixture designs based on; (a) data analyses of results from four potential laboratory tests, (b) comparisons of laboratory tests results to full-scale accelerated pavement test results, and (c) analyses of results from finite element simulations. The laboratory study evaluated of the repeated load test, the static creep test, the dynamic modulus test, and the Asphalt Pavement Analyzer (APA) test as potential performance tests to accompany airport HMA mixture design with a goal of providing acceptable threshold test results that predict rutting performance under aircraft traffic. Over 340 specimens were tested from 34 asphalt mixtures. Specific criteria for each test method were developed. Next, the test methods and criteria were applied to an HMA mixture design selected for accelerated pavement testing. The full-scale tests applied wheel loads that simulated both military fighter aircraft and heavy cargo aircraft traffic to a pavement constructed to meet typical airport design standards. In the first test, simulating fighter jet aircraft, the tire inflation pressure was 2241 kPa, and the pavement temperature was maintained at 43°C. The second test, simulating cargo aircraft, used a tire inflation pressure of 980 kPa and a pavement temperature of 25°C. As expected, rutting was much more severe in the first test. The full-scale tests were then simulated computationally using finite element modeling. The asphalt layer was modeled using the nonlinear viscoelastic, viscoplastic components of the Pavement Analysis Using Nonlinear Damage Approach (PANDA) model. The pavement sections and wheel loads from the field-tests were recreated using two-dimensional simulations within ABAQUS. The simulations resulted in very high rates of viscoplastic strain for the conditions of the first test, but almost no permanent deformation in the second test. Finally, recommendations for implementing APA criteria into airfield HMA mixture design are presented. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/152715
Evaluation Of Indirect Tensile Test Idt Procedures For Low Temperature Performance Of Hot Mix Asphalt
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Author : Donald W. Christensen
language : en
Publisher: Transportation Research Board
Release Date : 2004
Evaluation Of Indirect Tensile Test Idt Procedures For Low Temperature Performance Of Hot Mix Asphalt written by Donald W. Christensen and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Pavements, Asphalt categories.
Introduction and Research Approach -- Findings -- Interpretation, Appraisal, and Applications -- Conclusions and Recommendations -- References -- Appendixes.
Laboratory Tests For Hot Mix Asphalt Characterization In Virginia
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Author :
language : en
Publisher:
Release Date : 2005
Laboratory Tests For Hot Mix Asphalt Characterization In Virginia written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Asphalt categories.
This project reviewed existing laboratory methods for accurately describing the constitutive behavior of the mixes used in the Commonwealth of Virginia. Indirect tensile (IDT) strength, resilient modulus, static creep in the IDT and uniaxial modes, flexural beam fatigue, and dynamic modulus tests were conducted on two typical mixes used in Virginia: SM-9.5A (surface mix) and BM-25.0 (base mix). The tests conducted produced a wealth of data on typical values for the properties of the two mixes studied over a wide range of temperatures and loading frequencies. The results suggest that the IDT strength test is an effective test to characterize the tensile strength of hot-mix asphalt (HMA), especially for thermal cracking evaluation. The resilient modulus test and the static creep test in the IDT setup are practical and simple to perform, but the analysis of the measurements is complicated, and the variability of the results is high. The compressive uniaxial dynamic modulus and the uniaxial static creep tests were found to be simple to conduct and to analyze because of the homogeneous state of stress in the specimen during testing. The flexural fatigue test was time consuming, but the test produces valuable information about the fatigue properties of hot-mix asphalt. The investigation also found good correlations among the IDT strength, resilient modulus, and dynamic modulus results. A variety of tests is recommended for characterizing the mechanistic-empirical pavement analysis and design. These tests would provide the properties needed to characterize the asphalt layers for the pavement analysis and design. The recommended tests are as follows: IDT strength for characterizing HMA susceptibility to thermal cracking, dynamic modulus for characterization of the constitutive behavior of the HMA, uniaxial creep for characterizing permanent deformation characteristics, and flexural fatigue tests to characterize fatigue properties. Materials characterization testing can be a valuable tool in pavement design. The use of mechanistic-empirical modeling can be used to predict the performance of a pavement. With this type of testing and modeling, the materials used in pavements will be of better quality and more resistant to environmental and structural deterioration. A more durable pavement will aid in reducing the frequency and costs associated with maintenance.
Evaluation Of Test Methods For Stiffness Properties Of Hot Mix Asphalt Hma
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Author : Stephen Alan Cross
language : en
Publisher:
Release Date : 2004
Evaluation Of Test Methods For Stiffness Properties Of Hot Mix Asphalt Hma written by Stephen Alan Cross and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Pavements, Asphalt categories.
The current 1993 AASHTO "Design Guide for Design of Pavement Structures" uses resilient modulus to assign an "a" coefficient to hot mix asphalt (HMA) to determine the required thickness of the HMA layer for a given traffic loading and subgrade support condition. There are several methods to determine the modulus of a mix for use in determining the "a" coefficient. Modulus results are a function of the test method and curing conditions. Therefore, the test method and curing conditions would have an effect on the "a" coefficient used in thickness design and, hence, the thickness of the pavement layers. A need was voiced by the Kansas Department of Transportation (KDOT) to evaluate the available test methods for determination of the stiffness properties of HMA.
Evaluation Of Hot Mix Asphalt Moisture Sensitivity Using The Nottingham Asphalt Test Equipment
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Author : Sunghwan Kim
language : en
Publisher:
Release Date : 2005
Evaluation Of Hot Mix Asphalt Moisture Sensitivity Using The Nottingham Asphalt Test Equipment written by Sunghwan Kim and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Pavements, Asphalt categories.
Even though moisture sensitivity of Hot Mix Asphalt (HMA) mixtures has been recognized as a major form of distress in asphalt concrete pavements since the advent of asphalt paving technology, the mechanism of this problem has not been clearly identified until now. However, it has been agreed that it can be characterized by the loss of adhesive bond between the asphalt binder and the aggregate or by a softening of the cohesive bonds within the asphalt binder, both of which are due to the action of loading under traffic in the presence of moisture. The evaluation of Hot Mix Asphalt moisture sensitivity has been divided into two categories: visual inspection test and mechanical test. However, most of them have been developed in pre-Superpave mix design. This research was conducted to develop a new test protocol which can overcome the problems of the current procedures and to evaluate the possibility of using the Nottingham Asphalt Tester (NAT) in the resulting procedure.
Specification Criteria For Simple Performance Tests For Rutting
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Author : Matthew W. Witczak
language : en
Publisher: Transportation Research Board
Release Date : 2007
Specification Criteria For Simple Performance Tests For Rutting written by Matthew W. Witczak and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Pavements categories.
Laboratory Evaluation Of Hot Mix Asphalt Concrete Fatigue Cracking Resistance
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Author : Brandon Parker Jamison
language : en
Publisher:
Release Date : 2012
Laboratory Evaluation Of Hot Mix Asphalt Concrete Fatigue Cracking Resistance written by Brandon Parker Jamison and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
The recent changes in the Texas Department of Transportation (TxDOT) hot mix asphalt (HMA) mix design procedures to ensure that the mixture types routinely used on Texas highways are not prone to rutting raised concerns that these mixture types are now more susceptible to fatigue cracking. The primary goal of this study was to evaluate fatigue cracking test methods and recommend that which is both simple and robust, especially in qualifying commonly used Texas mixture types. One way to minimize fatigue cracking is through material screening and selection of appropriate mix designs that are representative of fatigue-resistant HMA mixes. However, there are not many standardized laboratory fracture resistance tests that have been universally adopted for routine mix design and/or screening purposes for HMA fatigue resistance. In this study, four different fracture test methods: the Overlay Tester (OT), Direct Tension (DT), Indirect Tension (IDT), and Semicircular Bending (SCB) tests were comparatively evaluated for their potential application as surrogate tests for routine fracture resistance evaluation and screening of HMA mixes in the laboratory. The evaluation criteria included: rationality of the test concept and correlation to field performance, repeatability and variability, simplicity and practicality of the sample fabrication process, and simplicity of data analysis. Results and key findings based on the laboratory fatigue resistance characterization of various commonly used Texas coarse- and fine-graded HMA mixes (Type B, C, and D) are presented in this paper. Overall, preliminary findings indicated that no monotonically-loaded test would be appropriate as a surrogate fatigue resistance test; however, the SCB test showed potential as a repeated-loading test. Suggested SCB test improvements include developing the repeated SCB test protocol, determining the appropriate failure criterion, and correlating laboratory performance to field performance.
Precision Of The Dynamic Modulus And Flow Number Tests Conducted With The Asphalt Mixture Performance Tester
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Author : Ramon Francis Bonaquist
language : en
Publisher: Transportation Research Board
Release Date : 2011
Precision Of The Dynamic Modulus And Flow Number Tests Conducted With The Asphalt Mixture Performance Tester written by Ramon Francis Bonaquist and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Technology & Engineering categories.
TRB’s National Cooperative Highway Research Program (NCHRP) Report 702: Precision of the Dynamic Modulus and Flow Number Tests Conducted with the Asphalt Mixture Performance Tester describes the development of precision statements for the dynamic modulus and flow number tests conducted with the Asphalt Mixture Performance Tester.