Improving Concrete Infrastructure Project Conditions by Mitigating Alkali–Silica Reactivity of Fine Aggregates

Alkali–silica reactivity (ASR) is one of multiple reactions responsible for premature loss in concrete infrastructure service life. ASR results the formation expansive, white-colored gel-like material which internal stresses within hardened concrete. ASR-induced result cracking, spalling, and increased reinforcement steel corrosion rates. The main objective this research to improve conditions projects by mitigating ASR’s damaging effect. expansion accelerated mortar bars poured using fine aggregates collected from different sources measured versus time evaluate aggregates’ reactivity. Different percentages supplementary cementitious materials (SCMs), including class C fly ash microsilica, were used remixing efficiency types SCMs bar expansion. findings showed that can mitigate ASR, thus decreasing mitigation highly dependent on incorporated SCM percentage particle fineness. Silica fume, having smallest size, displayed higher rates mitigation, followed ash. outcomes will assist design engineers avoiding future losses due cracking projects, reduce excessive need maintenance, repair, replacement activities.