Effect of particle size on alkali–silica reaction in recycled glass mortars

The effect of particle size on alkali–silica reaction (ASR) was investigated to clarify the difference in long-term ASR expansions in mortars using recycled green and brown glass as fine aggregates. Test results revealed that green particles of 1.18 and 2.36 mm showed the highest reactivity while the other sizes resulted in relatively low ASR expansions. Brown glass less than 2.36 mm did not result in large ASR expansion. Furthermore, different ASR suppressors were explored to suppress ASR expansion in mortar using 1.18 mm green glass particles. These included supplementary cementitious materials, steel fiber reinforcement and lithium compounds.