AASHTO T 240-13 (2017) PDF Download

AASHTO T 240-13 (2017) is a standard method of testing the effect of heat and air on a moving film of asphalt, also known as the Rolling Thin-Film Oven (RTFO) test. The purpose of this test is to evaluate the changes in the properties of semi-solid asphalt materials as a result of exposure to heat and air. The test involves subjecting a thin film of asphalt to elevated temperatures and airflow in a controlled chamber. The temperature and airflow conditions are specified in the standard.

The test is carried out by measuring the properties of the asphalt before and after the RTFO test. These properties may include the mass loss, viscosity, softening point, and ductility of the asphalt. By comparing the results before and after the test, the standard helps determine the effect of heat and air on the performance characteristics of the asphalt.

It is important to note that AASHTO T 240-13 (2017) is similar to ASTM D 2872-04, a similar standard used for the same purpose. However, there are technical differences between the two standards, which are specified in AASHTO T 240-13 (2017). These differences should be considered when implementing the test in accordance with the AASHTO standard.