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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'. Previous 5 Terms: aligerous aliphatic Aliquot Alkali Alkali-aggregate reaction (AAR) Next 5 Terms: alkalimeter alkaline alkalinity Alkali-silica reaction (ASR) Alkali-silicate-silica reaction (ASSR) About the author Mark McCracken Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English". Copyright © 2005-2011 by Mark McCracken, All Rights Reserved. TeachMeFinance.com is an informational website, and should not be used as a substitute for professional medical, legal or financial advice. Information presented at TeachMeFinance.com is provided on an "AS-IS" basis. Please read the disclaimer for details.