Influence of Limestone Mineral Addition in Cements on the Efficacy of SCMs in Mitigating Alkali-Silica Reaction Assessed by Accelerated Mortar Bar Test

This study evaluates the effect of limestone mineral addition in cement on efficacy supplementary cementitious materials (SCMs) mitigating alkali-silica reaction (ASR) using accelerated mortar bar test (AMBT). Mortars with and without SCMs were prepared by substituting portions 0% general portland (GP) increasing amounts limestone. (25% fly ash or 65% slag) exhibit negligible expansion regardless content binder, whereas mortars high almost identical for all substitutions. The results show that does not aggravate ASR, has no detrimental ASR mitigation, likewise observable ASR-mitigating properties under conditions. calcium silicate hydrate (C-S-H) composition is affected amount limestone, which suggests influence alkali uptake C-S-H. supported pore solution analysis where (both have drastically reduced concentration over time, substitution only resulted an reduction equivalent to (dilution). Moreover, carboaluminate phases formed when present observed decompose AMBT conditions; thus, their mitigation possible discern from this study.