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活性掺合料取代部分高碱水泥，不仅可减少混凝土的有效含碱量，还能抑制碱－骨料反应。试验结果表明：掺合料本身含碱量也会影响抑制效果；掺合料取代水泥量越多，对碱－骨料的抑制作用越强，但取代量太大，会影响混凝土的物理力学性能，适宜取代量为１０％左右。
The replacement of part of the high-alkali cement with an active admixture can not only reduce the effective alkali content of the concrete but also inhibit the alkali-aggregate reaction. The test results show that the alkali content of the admixture itself will also affect the inhibitory effect; the more the admixture replaces the cement, the stronger the inhibitory effect on the alkali-aggregate, but the too large substitution will affect the physical and mechanical properties of the concrete. The appropriate amount of substitution is about 10%.