Recommendation of RILEM TC 258-AAA: RILEM AAR-11: determination of binder combinations for non-reactive mix design or the resistance to alkali-silica reaction of concrete mixes using concrete prisms − 60 °C test method

Abstract

The RILEM AAR-11 concrete prism test (CPT) is a performance test method for testing aggregate combinations together with various binder combinations (i.e. composite cements or pure Portland cements + Supplementary Cementitious Materials; SCMs). The method covers the measurement of expansion produced by alkali-aggregate reaction of concrete prisms stored at 60 °C in a humid environment which accelerates the alkali-silica reaction (ASR). The principle of the method is founded upon the RILEM AAR-4.1 aggregate test method. The method has three different applications, i.e., (1) AAR-11.1: Assessment of how SCM content may reduce ASR susceptibility of an aggregate combination: Enabling the use of a specific reactive aggregate product together with critical binder combination(s) (minimum binder requirements) for producing non-reactive concrete. (2) AAR-11.2: Assessment of how available binder alkali content can be reduced by SCMs: Enabling the determination of the required general binder composition together with a regional worst-case aggregate combination for producing non-reactive concrete (within that region). (3) AAR-11.3: Assessment of the ASR-resistance of specific concrete compositions to verify its suitability in a performance test.