AASHTO PP 103-21 PDF Download

AASHTO PP 103-21 provides guidelines for the proper preparation and polishing of unbound aggregates for use in dynamic friction testing. The standard specifically focuses on the use of a three-wheel polishing device (TWPD) for this purpose.

The standard outlines the procedures and requirements for preparing the sample aggregates and the use of the TWPD to achieve the desired level of surface polishing. It covers factors such as sample size, sample collection methods, and the proper operation and maintenance of the TWPD.

Dynamic friction testing is an important component of pavement design and performance evaluation. This standard aims to ensure that the samples used for these tests are properly prepared and polished to provide accurate and reliable results. Following the guidelines outlined in AASHTO PP 103-21 will help ensure consistent and standardized sample preparation and polishing procedures for dynamic friction testing of unbound aggregates.