中文摘要：

在硫酸盐离子的攻击下面的水泥臼的扩大性质被试验性、理论的方法学习。首先，水泥臼与水的比率被制作到 0.4， 0.6，和 0.8 的水泥。第二，标本的扩大在硫酸盐答案埋头了在不同时间被测量。第三，在硫酸盐侵蚀下面的水泥臼的扩大的一个理论模型被优点建议代表体积元素方法。在这个模型，损坏进化由于在推迟的 ettringite 和水泥臼之间的相互作用被考虑。最后，数字计算被执行。数字、试验性的结果显示模型完美地描述水泥臼的扩大。

英文摘要：

The expansion property of cement mortar under the attack of sulfate ions is studied by experimental and theoretical methods. First, cement mortars are fabricated with the ratio of water to cement of 0.4, 0.6, and 0.8. Secondly, the expansion of specimen immerged in sulphate solution is measured at different times. Thirdly, a theoretical model of expansion of cement mortar under sulphate erosion is suggested by virtue of represent volume element method. In this model, the damage evolution due to the interaction between delayed ettringite and cement mortar is taken into account. Finally, the numerical calculation is results indicate that the model perfectly describes performed. The numerical and experimental the expansion of the cement mortar.