AASHTO T 240-21 PDF Download

The AASHTO T 240-21 standard is a test method that evaluates the impact of heat and air on a moving film of semi-solid asphalt materials. The purpose of this test is to measure the changes in the properties of the asphalt before and after the test.

During the test, the asphalt sample is exposed to controlled heating and air flow as it moves on a rotating shelf within the testing apparatus. This simulated aging conditions in a laboratory setting. After the test, various properties of the asphalt are measured to assess the effects of heat and air.

The results of the test provide valuable information on the performance characteristics of the asphalt, such as its susceptibility to oxidation, hardening, and cracking. This information is crucial for evaluating the durability and long-term performance of asphalt materials used in road construction and pavement applications.