AASHTO T 303-00 (2021) PDF Download

AASHTO T 303-00 (2021) is a standard method of testing that is specifically designed to detect potentially harmful expansion of mortar bars caused by alkali-silica reaction (ASR) in a accelerated manner. The purpose of this test is to provide a quick evaluation within a 16-day timeframe to determine if the ASR is present.

This method is crucial for materials used in construction projects, as ASR can lead to severe damage in concrete structures over time. By detecting the potential for deleterious expansion of mortar bars due to ASR, this standard allows for timely identification and mitigation measures to be implemented before any significant damage occurs.

The test method outlined in AASHTO T 303-00 (2021) involves the preparation of mortar bars that are exposed to alkaline solutions and stored in an environment with controlled temperature and humidity. The expansion of the mortar bars is then monitored over a period of 16 days to determine if there is evidence of ASR.