摘   要：通过测定沸石的离子交换量随时间的变化、沸石的水化程度及沸石对孔溶液中碱含量的影响，分析和讨论了沸石在抑制碱硅酸反应中的作用。结果显示，沸石的离子交换能力在最初的10min最强，2h时达到总交换量的约80％，约在2d时趋于平衡；当沸石取代水泥30％，在6个月龄期时，沸石的反应程度约为40％～50％；沸石通过降低可溶性碱量或有效碱量来抑制碱硅酸反应膨胀；当沸石达到一定掺量以上时，沸石中的碱并不影响其对碱硅酸反应的抑制作用。

Abstract: The effect of natural zeolite on restraining alkali-silica reaction has been investigated through the tests of measuring the ion exchange capacity of natural zeolite with time, the hydration degree of natural zeolite and the influences of natural zeolite on alkali content in the pore solution. The results show that the ion exchange rate is of the highest at the first 10 minute, the ion exchange capacity reaches 80% of the total capacity in 2 hours and the exchange tends to equilibrium in about 2 days. In the case of cement being replaced by 30% of natural zeolite and the duration of hydration for 6 months, the hydration degree of natural zeolite is about 40%-50%. The ASR expansion is restrained by natural zeolite through reducing the water soluble alkali content and the effective alkali content. There is no disadvantage effect of the alkali in natural zeolite on restraining alkali-silica reaction, when the replacement level of cement by natural zeolite is more than a certain quantity.