TeachMeFinance.com - explain Alkali-carbonate reaction (ACR)
Alkali-carbonate reaction (ACR) The term 'Alkali-carbonate reaction (ACR)' as it applies to the area of reclamation can be defined as ' Reaction of alkalis which occurs between certain argillaceous dolomitic limestones and the alkaline pore solution in the concrete and causes expansion and extensive cracking. Expansive dolomite limestones are characterized by a matrix of fine calcite and clay minerals with scattered dolomite rhobohedra. This reaction usually occurs early and structures may show cracking within 5 years after construction. See alkali-aggregate reaction'.
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