The resistance to physical sulfate damage was tested for a variety of cementitious mixtures including ordinary portland cement, calcium sulfoaluminate belite (CSAB) cement, a CSAB-fly ash blend and an air-entrained CSAB. Mortar bars were exposed to DI water or 5 % sodium sulfate solutions under cyclical wet-dry conditions. The expansions of the specimens were measured after each wetting cycle. A water sorptivity test, thermogravimetric analysis, x-ray diffraction analysis, mercury intrusion porosimetry method, and micro-computed tomography were applied to study differences in expansion and cracking in the mixtures. The results showed that the incorporation of fly ash into the CSAB matrix reduced cumulative pore volumes and slightly increased micropore sizes – both of which contributed to failure of the CSAB-fly ash systems. Use of the air-entraining agent in CSAB produced more, smaller, and more uniform pores, but did not influence the performance of CSAB. Both the CSAB and air entrained CSAB mixtures showed good resistance to physical sulfate damage. Samples with average pore diameters <15 nm prevented infiltration of sulfate ions and slowed the onset of salt crystalization damage.

测试了多种胶凝混合物的抗物理硫酸盐破坏性，包括普通波特兰水泥、硫铝酸钙贝利特 (CSAB) 水泥、CSAB-飞灰混合物和加气 CSAB。砂浆棒在循环干湿条件下暴露于去离子水或 5% 硫酸钠溶液。在每个润湿循环后测量样品的膨胀。采用吸水性测试、热重分析、X 射线衍射分析、压汞法和微型计算机断层扫描来研究混合物中膨胀和开裂的差异。结果表明，将飞灰掺入 CSAB 基质中会减少累积孔体积并略微增加微孔尺寸——这两者都导致了 CSAB 飞灰系统的失效。在 CSAB 中使用引气剂会产生更多、更小和更均匀的孔隙，但不会影响 CSAB 的性能。CSAB 和夹带空气的 CSAB 混合物均表现出良好的抗物理硫酸盐破坏性。平均孔径 <15 nm 的样品可防止硫酸根离子的渗透并减缓盐结晶损伤的发生。