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原文传递 Quality Management of Flexible Pavement Layers with Seismic Methods: Test Methods.

题名：	Quality Management of Flexible Pavement Layers with Seismic Methods: Test Methods.
关键词：	laboratory devices, field devices, testing, moduli, measurement, data collection
摘要：	The focus of the project has been on nondestructively measuring moduli with four inter-related seismic devices. Two of these are laboratory devices: the free-free resonant column device for testing base and subgrade and the ultrasonic device for testing HMA cores and molded specimens. The other two are field devices: the Portable Seismic Pavement Analyzer (PSPA) for testing HMA layers and a version of it that works on the base and prepared subgrade layers (affectionately called DSPA for Dirt Seismic Pavement Analyzer). Procedures have been developed to measure the moduli of each pavement layer shortly after placement. These procedures allow rapid data collection and interpretation. Thus, any problem during construction process can be identified and adjusted. The proposed equipment and methodologies may strike a balance between the existing level of sophistication in the design methodology, laboratory testing and field testing. / Supplementary Notes: Sponsored by Texas Dept. of Transportation, Austin. Research and Technology Implementation Office. and Federal Highway Administration, Austin, TX. Texas Div. /
报告类型：	科技报告