Abstract A chemical-reactive transport model is used to simulate the sulfuric acid attack of cement pastes based on ordinary Portland cement (CEM I), blended Portland cements (CEM III, CEM IV, and CEM V), and calcium aluminate cement (CAC). This model accounts for the dissolution of cement hydrates (portlandite, C-S-H, hydrogarnet), and the precipitation of deterioration products (ettringite and gypsum). Moreover, diffusion of the aqueous species in the pore space of the material is considered. With this model, the hydrate contents, the porosity, and the deterioration phase contents throughout a sulfuric acid attack are determined. Two indicators are defined to predict the service life of the cementitious materials: the deterioration depth and the dissolved calcium content. These two indicators show that calcium aluminate cement has a better resistance to sulfuric acid attack than that of Portland cements. This better resistance is mainly due to the partial dissolution of CAC hydrate as opposed to the total dissolutions of CH and C-S-H.

中文翻译：

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硫酸对不同类型胶凝材料的侵蚀建模

摘要 使用化学反应输运模型模拟基于普通硅酸盐水泥 (CEM I)、混合硅酸盐水泥 (CEM III、CEM IV 和 CEM V) 和铝酸钙水泥 (CAC) 的水泥浆体的硫酸侵蚀。 . 该模型考虑了水泥水合物（硅酸盐、CSH、水石榴石）的溶解和劣化产物（钙矾石和石膏）的沉淀。此外，还考虑了含水物质在​​材料孔隙空间中的扩散。使用该模型，可以确定整个硫酸侵蚀过程中的水合物含量、孔隙率和劣化相含量。定义了两个指标来预测胶凝材料的使用寿命：劣化深度和溶解钙含量。这两项指标表明铝酸钙水泥比硅酸盐水泥具有更好的抗硫酸侵蚀能力。这种更好的抵抗力主要是由于 CAC 水合物的部分溶解而不是 CH 和 CSH 的全部溶解。