Identification of Chemical Agents for the Control of Alkali-Aggregate Reaction inConcrete

摘要

In the report a number of chemical compounds were evaluated for theireffectiveness in inhibiting alkali-silica reaction in concrete, either as admixtures in the concrete mix or as penetrating agents to stop further progress of the reaction in already-affected or damaged concrete. Two compounds, zinc sulfate and aluminum sulfate, were found to be effective admixtures for fresh concrete. Zinc sulfate also appeared to significantly reduce the subsequent expansion of mortar bars, and could be a suitable penetrating agent for arresting alkali-silica reaction in hardened concrete.