The objectives of the research were: (1) to investigate possible modifications to the existing TSR test protocol or develop an alternate test method, and a conditioning procedure that can quantify the adhesive and cohesive damage in asphalt mixtures due to moisture; (2) to quantify adhesive damage in asphalt mixture using the boil test along with color measuring device; (3) to investigate the use of M.i.S.T conditioning procedure to quantify the cohesive damage in asphalt mixtures; (4) to explore the viability of the Impact Resonance test in assessing moisture damage in asphalt mixtures; (5) to evaluate the effect of different antistrip additives on asphalt mixtures and determine optimum antistrip additive content using the boil test with colorimeter device for different asphalt mixtures.
The objectives were achieved by performing IDT test to obtain TSR from AASHTO T283 (currently used by NCDOT) and M.i.S.T conditioning (proposed conditioning procedure). The Boil Test (ASTM D3625) was done along with colorimeter device to quantify adhesive damage. The test were performed on six different HMA mixtures prepared from three different aggregate source. The Impact Resonance test was performed to study the effect of various support conditions on resonant frequency and its ability to detect moisture damage. The Boil Test along with colorimeter device was done on fifty four different loose mixtures prepared from three different aggregate source and three different antistrip additives with varying additive content. The most compatible and optimum antistrip additive content for a particular asphalt mixture was determined.
