Rationale

Percentage of air voids is widely accepted to influence results of mechanical property tests for asphalt mixtures, with most standards limiting air voids to ±0.5% of the target air void content as a result; D4867/D4867M currently allows 7 ± 1 % air voids. Similarly, degree of saturation is widely accepted to influence conditioned indirect tensile strength and tensile strength ratio (TSR) results, particularly with the wide range of 55 to 80% currently allowed in D4867/D4867M. This work item seeks to revise D4867/D4867M through two separate ballot items to address concerns with current air void and degree of saturation requirements. Specifically, the motivation is to harmonize D4867/D4867M with AASHTO T 283 in these areas, which are the only two areas to be revised.