Full-Scale Laboratory Evaluation of Moisture Effect on Resilient Moduli of Granular Pavement Subgrade Layers

The measurement of resilient modulus has become increasingly accepted for characterizing the engineering properties of pavement materials. This paper presents an experimental program utilizing the Florida DOT test-pit facility and laboratory triaxial equipment to conduct the resilient modulus measurement of granular pavement subgrade materials in Florida. The resilient modulus was significantly affected by the moisture content of granular subgrades. A comparison between the resilient moduli measured from the test-pit test and the laboratory test was made. It was experimentally verified that the resilient modulus resulting from the laboratory triaxial test could be used to predict the resilient deformation of the pavement layer.