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International Conference on Alkali-Aggregate Reaction Proceedings

Alkali-Aggregate reaction is a an umbrella term for two types of premature concrete deterioration: alkali-silica reaction (most common) and alkali-carbonate reaction (less common). These forms of deterioration encompass a chemical reaction between CERTAIN aggregate types and the host cement paste, most importantly the internal pore solution in concrete. AAR has been studied since the mid 1930s after the discovery of alkali-silica reaction (ASR) by Thomas Stanton of the California Division of Highways. A conference series devoted to understanding reaction mechanisms, testing methods, prediction, diagnosis and repair has been active since 1974 with a total of 15 conferences held to date. This website provides the first known web presence to consolidate and make available all of the previous ICAAR Conference Proceedings in electronic format.

The 17th ICAAR will be held May 18th – 24th, 2024 in Ottawa, Ontario, Canada. The theme of the conference is Expanding Networks and Filling Gaps.

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Our team is currently adding all past ICAARs to the website. ICAAR 1, 3, 4, 5, 6, 8, 9, 10, 11, 13, 14 and ICAAR 15 are available for search and download.

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