RESILIENT MODULUS OF ASPHALT CONCRETE. FINAL REPORT

The 1986 AASHTO Guide for Design of Pavement Structures incorporates the resilient modulus of pavements into the procedure. This parameter is analogous to one of the two constants used for linear elastic models of material behavior. Mechanistic models that incorporate parameters such as the modulus are being explored in current major research efforts that may replace the AASHTO Guide in the future. At present, the Texas Department of Transportation does not routinely perform resilient modulus tests. Several approaches to measurement of the modulus of asphalt concrete have been developed in this study to provide the Department with the capability to perform this test in support of both design activities and corroboration of nondestructive field testing. Techniques were developed that can be modified easily to incorporate new research findings and procedures oriented toward mechanistic design methods.