ASTM STP 1437 Resilient Modulus Testing for Pavement Components
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Durham GN
ASTM International Committee D18 on Soil and Rock and Subcommittee D18.09 on Cyclic and Dynamic Properties of Soils served as sponsors for the Symposium on Resilient Modulus Testing for Pavement Components held in Utah June, 2002. This STP contains the proceedings from that symposium.
The current standards for resilient modulus testing, AASHTO T292-00 and T307-99 for soils and ASTM D 4123 for asphalt, do not yield consistent and reproducible results. Differences in test equipment, instrumentation, sample preparation, end conditions of the specimens, and data processing apparently have considerable effects on the value of resilient modulus obtained from the test. These problems have been the topic of many papers over the past thirty years; however, a consensus has not developed on how to improve the testing standard to overcome them. These conditions prompted ASTM Subcommittee D18 to organize and hold a symposium to examine the benefits and problems with resilient modulus testing.
Papers presented in this publication cover test methods through topics such as differences between AASHTO T307-99 and Long Term Pavement Performance Protocol P46; test equipment topics such as a fully automated computer controlled testing system for performing resilient modulus tests; test results papers address topics such as the effect of water content and pore water pressure buildup on the resilient modulus of unsaturated and saturated cohesive soils.
Specific topics addressed by the papers in this publication include:
- repeated-loading triaxial test
- soil-polypropylene fiber mixtures
- servo-hydraulic system
- motion controller
- testing equipment
- pavement subgrade design
- flexible pavement design
- intrusion design
- pore water pressure buildup
These papers provide critical information for individuals and organizations involved with test equipment, test instrumentation, specimen preparation procedures, and loading requirements to improve the reproducibility and reliability of resilient modulus tests among laboratories.