Mechanical properties and alkali silica reaction of recycled glass fine aggregate mortar

Abstract

The recycled glass fine aggregate (RG) causes an alkali-silica reaction (ASR) in concrete of mortar using cement materials. However, supplementary cementitious materials (SCMs) like fly ash, silica fume, blast furnace slag can reduce ASR expansion of RG. In this study, the mechanical properties and ASR behavior of RG mortar mixed with/without SCMs was evaluated. It was confirmed that the RG mortar mixed with SCMs decreased ASR expansion. However, the mechanical properties after ASR decreased as reaction days increased. This is because ASR gel was formed inside the microcracks that existed in RG. Therefore, the ASR gel inside the RG destroyed the RG and reduce the mechanical properties of mortar.