What does ASR stand for in construction terminology?

In construction terminology, ASR stands for Alkali Silica Reaction. This is a chemical reaction that occurs between the alkalis present in cement and the reactive silica found in certain aggregates. The reaction can lead to the formation of a gel that expands when it absorbs water, causing cracking and deterioration in concrete structures over time. This reaction is a significant concern in civil engineering, as it affects the durability and longevity of concrete structures.

The understanding of ASR is crucial for engineers and construction professionals when selecting materials and designing concrete mixes. Mitigating measures can include using non-reactive aggregates, incorporating pozzolans, and controlling the alkali content in cement, all of which help prevent the detrimental effects of ASR in concrete constructions.