AASHTO PP 99-19 (2021) PDF Download

AASHTO PP 99-19 (2021) is a provisional standard practice that provides guidelines for the preparation of small cylindrical performance test specimens using a Superpave gyratory compactor (SGC) or field cores. The purpose of this standard is to prepare test specimens with specific dimensions (38 mm in diameter and 110 mm in height) for conducting axial compression and tension performance tests on dense-graded asphalt mixtures.

The standard is limited to dense-graded asphalt mixtures with nominal maximum aggregate sizes up to 19.0 mm. It outlines the equipment and procedures required for specimen preparation using both the SGC and field cores. The standard aims to ensure consistent and reliable test results by providing detailed instructions on sample collection, compaction, and trimming techniques.