Abstract
Development and assessments of test methods, to avoid deleterious AAR in concrete, have been the focus of three previous RILEM Technical Committees (TC) in the period 1989 to 2014. The 4th RILEM TC on AAR, TC 258-AAA, was established in 2014, and will until 2019 focus on the following Work Packages: WP1- Performance based testing concepts; WP2 - Relationship between results from laboratory and field and the establishment of field exposure sites; WP3 - Testing of potential alkalis released from certain types of aggregates and measurement of internal concrete alkali content; WP4 - Verification of alkalis released from aggregates.