AASHTO T 387-19 PDF Download

The standard AASHTO T 387-19 provides a method for determining the cracking temperature of asphalt binders using the Asphalt Binder Cracking Device (ABCD). This device is capable of testing both unaged material and material that has been aged using the Rolling Thin Film Oven Test (RTFOT) or Pressure Aging Vessel (PAV), or both. The cracking temperature range that can be tested using this apparatus is from -60 to +20°C.

The purpose of this standard is to assess the susceptibility of asphalt binders to cracking at low temperatures, which is an important characteristic for pavement performance in cold climates. The cracking temperature is the temperature at which the binder undergoes a rapid increase in stiffness, indicating its tendency to crack under thermal stress.

The AASHTO T 387-19 standard specifies the equipment and procedures for testing the cracking temperature of asphalt binders. The apparatus consists of a sample container, a temperature-controlled bath, and a system for applying a constant load to the sample. The test procedure involves cooling the sample to a specified temperature range and measuring the force required to cause cracking.

This standard helps ensure consistent and accurate determination of the cracking temperature of asphalt binders using the ABCD. It provides guidance for conducting the test and interpreting the results, which can be used to select appropriate binders for cold weather conditions and optimize pavement design and performance.