Development of a Numerical Model to Predict the Dielectric Properties of Heterogeneous Asphalt Concrete

Ground-penetrating radar (GPR) has been used for asphalt concrete (AC) pavement density prediction the past two decades. Recently, it considered as a method quality control and assurance. A numerical to estimate specific gravity from its dielectric properties was developed validated. three-phase model considering aggregate, binder, air void components using an AC mixture generation algorithm. take-and-add algorithm generate uneven air-void distribution in model. The proposed is capable of correlating bulk component properties. validated field data. Two methods were calculate constant mixture, including reflection amplitude two-way travel time methods. These simulated compared when vertical longitudinal heterogeneity existed within layers. Results indicate that more sensitive surface thin layers than Effect content, aggregate gradation, constants on GPR measurements studied