本规程描述了识别潜在有害活性骨料的方法，以及选择适当的预防措施，以将此类骨料用于混凝土时的膨胀风险降至最低。包括碱-硅反应性骨料和碱-碳酸盐反应性骨料。碱硅活性骨料的预防措施包括避免使用活性骨料、限制混凝土的碱含量、使用混合水泥、使用辅助胶凝材料、使用硝酸锂作为外加剂，或这些措施的组合。碱碳酸盐活性岩的预防措施仅限于避免活性骨料。

This practice describes approaches for identifying potentially deleteriously reactive aggregates and selecting appropriate preventive measures to minimize the risk of expansion when such aggregates are used in concrete. Both alkali-silica reactive and alkali-carbonate reactive aggregates are covered. Preventive measures for alkali-silica reactive aggregates include avoiding the reactive aggregate, limiting the alkali content of the concrete, using blended cement, using supplementary cementitious 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 reactive aggregate.