A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Resilient Modulus Testing and Density Gradient Analysis of Selected Asphalt Mixes
In recent years, there has been a change in philosophy in flexible pavement design from an empirical approach to a more mechanistic approach, based on elastic theory. According to the AASHTO 2002 guide for flexible pavement design, visco-elastic analysis is not required for asphalt concrete layer, provided the asphalt concrete's module (dynamic or resilient modulus) value used in design addresses appropriate loading rate (frequency) and temperature. Although resilient modulus is an important input of pavement design, the determination of the resilient modulus of asphalt concrete in the laboratory is not a trivial task. This study analyzed and evaluated the critical issues related to accurate determination of resilient modulus of asphalt concrete in the laboratory. The study is divided into three parts. The first part of the study focused on the accuracy of test results. The second part focused on the variation of resilient modulus with temperature, air voids, asphalt content, bender's performance grade (PG) and testing protocols. The third part of this study correlated the resilient modulus with rutting potential of hot mix asphalt (HMA) samples. Another major part of the study is to determine the density gradient, if any, within asphalt sample.
Resilient Modulus Testing and Density Gradient Analysis of Selected Asphalt Mixes
In recent years, there has been a change in philosophy in flexible pavement design from an empirical approach to a more mechanistic approach, based on elastic theory. According to the AASHTO 2002 guide for flexible pavement design, visco-elastic analysis is not required for asphalt concrete layer, provided the asphalt concrete's module (dynamic or resilient modulus) value used in design addresses appropriate loading rate (frequency) and temperature. Although resilient modulus is an important input of pavement design, the determination of the resilient modulus of asphalt concrete in the laboratory is not a trivial task. This study analyzed and evaluated the critical issues related to accurate determination of resilient modulus of asphalt concrete in the laboratory. The study is divided into three parts. The first part of the study focused on the accuracy of test results. The second part focused on the variation of resilient modulus with temperature, air voids, asphalt content, bender's performance grade (PG) and testing protocols. The third part of this study correlated the resilient modulus with rutting potential of hot mix asphalt (HMA) samples. Another major part of the study is to determine the density gradient, if any, within asphalt sample.
Resilient Modulus Testing and Density Gradient Analysis of Selected Asphalt Mixes
R. A. Tarefder (author) / M. Zaman (author)
2004
112 pages
Report
No indication
English
Construction Equipment, Materials, & Supplies , Asphalts , Hot mix paving mixtures , Pavement overlays , Laboratory tests , Aggregates , Binders , Road materials , Reproducibility , Literature review , Density measurement , Pavement tests , Temperature , Air voids , Test methods , Resilient modulus , Density gradient analysis , Rutting
Variations in Measured Resilient Modulus of Asphalt Mixes
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