AASHTO R 80 PDF download

Standard Practice for Determining the Reactivity of Concrete Aggregates and Selecting Appropriate Measures for Preventing Deleterious Expansion in New Concrete Construction

AASHTO R 80 – Standard Practice for Determining the Reactivity of Concrete Aggregates and Selecting Appropriate Measures for Preventing Deleterious Expansion in New Concrete Construction

This practice describes approaches for identifying potentially deleteriously reactive aggregates andselecting appropriate preventive measures to minimize the risk of expansion when such aggregatesare used in concrete. Both alkali-silica reactive and alkali-carbonate reactive aggregates arecovered. Preventive measures for alkali-silica reactive aggregates include avoiding the reactiveaggregate, limiting the alkali content of the concrete, using blended cement, using supplementarycementitious materials, using lithium nitrate as an admixture, or a combination of these measures. Preventive measures for alkali-carbonate reactive rocks are limited to avoiding the reactiveaggregate.