There are various methods available for minimizing the risk of ASR-induced expansion in concrete, including:
· use of non-reactive aggregate (or exploitation of the `pessimum’ effect)
· limiting the alkali content of the concrete
· use of supplementary cementing materials (SCMs) and
· use of lithium compounds.
Limiting the alkalis in concrete or using either SCMs or lithium compounds has not been found to be effective for controlling expansion due to alkali- carbonate reaction (ACR) and, consequently, the use of alkali-carbonate reactive rocks in concrete should be avoided.
