1. Scope

Keywords

Rationale

The US is undergoing a major change in asphalt mixture specifications. The change is moving from Superpave materials volumetric design, control, and acceptance to end-result testing referred to as Balance Mix Design (BMD). Currently, agencies are using the Hamburg Wheel Tracker or Asphalt Pavement Analyzer for permanent deformation (rutting) evaluation of the mixture. These tests take several hours to run. While longer times are acceptable for the mix design phase, a faster test is needed for materials control and acceptance testing. HT-IDT is one option that can be used for acceptance testing.