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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.

Search ICAAR Proceedings

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

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COVID-19 Update:

In the global context of the current COVID-19 pandemic, and after obtaining feedback and suggestions from both the AAR International Committee and many Colleagues, the ICAAR Organizing Committee has decided to maintain the conference as a physical event and, as such, to postpone the 16th International Conference on Alkali Aggregate Reaction in Concrete to 31 May – 2 June 2022.

Please visit the Conference Website for complete information on the 16th ICAAR proceedings, which will be published in two books.

If you have any concern regarding ICAAR 2020-2022, please visit the Conference website (http://icaar2020-2022.lnec.pt/) or contact the Conference Secretariat (email: [email protected]).