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Quality Management of Flexible Pavement Layers with Seismic Methods: Test Methods

机译：用抗震方法对柔性路面层进行质量管理：试验方法

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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.

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