The realistic assessment of alkali-silica reactivity (ASR) and identification of appropriate preventive measures remain major challenges to the concrete and aggregate industry. Guidelines for estimating ASR potential are currently provided in AASHTO R 80 and ASTM C1778. However, since these guidelines are based on testing concrete mixtures with rather high cement and alkali contents, they may not properly apply to mixtures with moderate or low cement and alkali contents, which are generally used in highw…