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TeachMeFinance.com - explain Alkali-silicate-silica reaction (ASSR) Alkali-silicate-silica reaction (ASSR) The term 'Alkali-silicate-silica reaction (ASSR)' as it applies to the area of reclamation can be defined as ' Reaction of alkalis with strained quartz is thought to be one reactive component of aggregates causing this reaction. A wide variety of quartz-bearing rocks have been found to be reactive including graywackes, argillites, quartzwackes, quartzarenites, quartzites, hornfels, quartz biotite, gneiss, granite, phyllite, arkose and sandstone. This type of reaction is characterized by a delayed onset of expansion and cracking may not become evident for up to 20 years after construction. See alkali-aggregate reaction'. Previous 5 Terms: Alkali-carbonate reaction (ACR) alkalimeter alkaline alkalinity Alkali-silica reaction (ASR) Next 5 Terms: Alkylate Alkylation allantoid allegany hardwood forest type Allele 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.