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- W179431341 abstract "The Mechanistic-Empirical Pavement Design Guide (M-E PDG) requires the resilient modulus of underlying materials for both new construction and rehabilitation projects. For the latter projects, the M-E PDG recommends using nondestructive test (NDT) methods such as the falling weight deflectometer (FWD) to characterize the in-situ resilient modulus of underlying materials. Considering that the performance models in the new guide were calibrated using resilient modulus data from laboratory tests, there is a need to convert the resilient modulus obtained from NDT tests to equivalent laboratory values for inputs to the M-E PDG program. In this project, Texas Transportation Institute researchers and engineers with the Florida Department of Transportation (FDOT) conducted a cooperative effort to evaluate correction factors for overlay design based on the M-E PDG. To evaluate correction factors for base, mechanically stabilized subgrade and embankment materials used on Florida pavements, researchers reviewed available data and findings from earlier projects to compile information that can be used for this evaluation. In consultation with FDOT engineers, researchers also developed field and laboratory test plans to collect additional data to fill gaps in the available information as identified from the literature review. Based on these plans, field and laboratory tests were conducted to characterize material properties of in-service pavement sections. Field tests included FWD, portable seismic pavement analyzer (PSPA), dynamic cone penetrometer, and material sampling of asphalt concrete cores and underlying materials to measure the field moisture contents at the time of the tests. Laboratory tests included resilient modulus, dynamic modulus, dynamic shear rheometer, soil suction and extractions to characterize properties of asphalt concrete mixtures and underlying materials for evaluating correction factors and investigating the applicability of the PSPA for in-situ assessment of asphalt concrete layer modulus. Researchers analyzed the test data to determine correction factors and to evaluate the relationships between these factors and FWD backcalculated layer moduli. This report documents the efforts made to evaluate correction factors applicable to Florida pavement materials for flexible pavement overlay design based on the M-E PDG." @default.
- W179431341 created "2016-06-24" @default.
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- W179431341 date "2011-01-01" @default.
- W179431341 modified "2023-09-26" @default.
- W179431341 title "Comparison of Resilient Modulus Values Used in Pavement Design" @default.
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