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This outline guide, RILEM AAR-0, describes how to use the following test methods in the assessment of the alkali reactivity potential of aggregates and concrete. The test methods included are:  AAR-1.1 Petrographic examination method (2016)  AAR-1.2 Recommended guidance (Atlas) (2016)  AAR-2 Accelerated mortar-bar method (2016)  AAR-3.1 &amp; AAR-3.2 Concrete prism test—38 °C (2016)  AAR-4.1 Concrete prism test—60 °C (2016)  AAR-5 Screening test for carbonate aggregates (2016)  AAR-8 Determination of alkalis releasable by aggregates in concrete (2021)  AAR-10.1 &amp; 10.2 Concrete prism test—38 °C (2021)  AAR-11.1, 11.2 &amp; 11.3 Concrete prisms test—60 °C test method (2021)  AAR-12.1, 12.2 &amp; 12.3 Concrete prisms—60 °C test method with alkali supply (2021)  AAR-13 Application of alkali-wrapping for concrete prism testing (2021)  This recommendation has been prepared by a working group within RILEM TC 258-AAA. The recommendation has been reviewed and approved by all members of the TC.

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Recommendation of RILEM TC 258-AAA: RILEM AAR-0 outline guide to the use of RILEM methods in the assessment of the alkali-reactivity potential of concrete