AASHTO T 283-21 PDF Download

The AASHTO T 283-21 standard is titled "Standard Method of Test for Resistance of Compacted Asphalt Mixtures to Moisture-Induced Damage." This standard provides guidelines for preparing specimens and measuring the change in diametral tensile strength of compacted hot mix asphalt (HMA) when subjected to water saturation and accelerated water conditioning with freeze-thaw cycles.

The purpose of this test is to evaluate the potential for moisture-induced damage, specifically stripping, in HMA. Stripping refers to the loss of adhesion between the asphalt binder and the aggregate, which can lead to premature pavement failure. By measuring the change in diametral tensile strength of the compacted specimens, the test results can be used to predict the long-term susceptibility of the HMA mixture to stripping.

In addition to evaluating moisture-induced damage, this standard also allows for the assessment of liquid anti-stripping additives. These additives can be added to the asphalt binder or incorporated as pulverulent solids, such as hydrated lime or portland cement, in the mineral aggregate. The test can determine the effectiveness of these additives in enhancing the resistance of the compacted HMA to moisture-induced damage.