AAR mechanisms and affecting factors -- DEF and coupled mechanisms -- Testing for potential AAR -- Preventive measures and guidelines -- Repair and remedial measures -- Diagnosis, evaluation and prognosis -- Monitoring and non-destructive methods -- Mechanical and physcial effects at the material and structural scales of AAR and coupled mechanisms -- Modelling (micro, meso and macroscales) -- Cases of deterioration and management -- From laboratory testing to field behaviour -- Performance of sustainable materials against AAR and combined mechanisms.

This book gathers the peer-reviewed papers presented at the 17th International Conference on Alkali-Aggregate Reaction in Concrete (ICAAR), held in Ottawa, Ontario, Canada, on May 19-24, 2024. It highlights the latest advances and innovations in the field of internal swelling reactions, particularly alkali-aggregate reaction (AAR), and combined mechanisms such as delayed ettringite formation (DEF). The conference topics encompass understanding the reaction mechanisms and the affecting factors; testing methods and preventative measures; diagnosis, evaluation, and prognosis; monitoring and NDT; structural effects and modeling at all scales; repair and remedial measures; and combined mechanisms (e.g., DEF). The contributions, which were selected by means of a rigorous international peer-review process, present a wealth of exciting ideas that will open novel research directions and foster new multidisciplinary collaborations.