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Alkali-Aggregate Reactions in Concrete

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In most concretes, aggregates are more or less chemically inert. However, some aggregates react with the alkali hydroxides in concrete, causing expansion and cracking over a period of many years. This alkali-aggregate reaction has two forms: alkali-silica reaction (ASR) and alkali-carbonate reaction (ACR). ASR is the most common form of alkali-aggregate reaction (AAR) in concrete; the other, much less common, form is alkali-carbonate reaction (ACR). If the aggregate is shown to be potentially reactive by the tests, some mitigation measure must be used to control the expansion and cracking. Alkali-silica reaction can be controlled using certain supplementary cementitious materials.


  • Aggregate
  • Alkali-silica reaction
  • Testing methods
  • Mitigation

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The work reported in this paper is a part of investigation within the research project TR 36017 “Utilization of by-products and recycled waste materials in concrete composites in the scope of sustainable construction development in Serbia: investigation and environmental assessment of possible applications” supported by Ministry for Science and Technology, Republic of Serbia. This support is gratefully acknowledged.

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Correspondence to Gordana Topličić–Ćurčić .

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Topličić–Ćurčić, G., Mitić, V.V., Grdić, D., Miljković, M. (2016). Alkali-Aggregate Reactions in Concrete. In: Lee, W., Gadow, R., Mitic, V., Obradovic, N. (eds) Proceedings of the III Advanced Ceramics and Applications Conference. Atlantis Press, Paris.

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