RELATIONSHIP BETWEEN HEAVILY TRAFFICKED ASPHALT PAVEMENT SOUNDNESS EVALUATION INDEX AND GRANULAR BASE COMPRESSIVE STRAIN USING FWD DATA

Abstract

 In order to evaluate the soundness of the granular base course by FWD for heavily trafficked asphalt pavement, the authors proposed a simple compressive strain prediction model using the base damage index (BDI) obtained directly from the FWD deflection curve which based on the relationship between BDI and the compressive strain on the surface of the granular base obtained from the multi-layered elastic analysis. In this study, we added data to improve the reliability of the compressive strain prediction model and its temperature-correct equation and examined about the relationship between compressive strain and various FWD based soundness evaluation indices of asphalt pavement shown in existing technical books. As the results, a soundness evaluation method for asphalt pavement by combining compressive strain with existing evaluation indices was proposed in this study.