The use of recycled concrete aggregate (RCA) in concrete is a promising method to decrease the amount of demolished concrete sent to landfills as well as lowering the amount of CO2 emissions that are produced by mining and transporting natural aggregates (NA) for use in new concrete. The use of RCA instead of NA in new concrete is severely hindered, however, by a lack of technical information on the long-term durability of this concrete. The research presented focused on assessing the reactivity of RCA produced from parent concrete previously affected by alkali-silica reaction (ASR) when incorporated into new concrete using current testing methods; as well as the efficacy of supplementary cementitious materials (SCMs) already known to mitigate ASR in concrete with reactive NA to control ASR in concrete incorporating reactive RCA.
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