Effect of calcium sulfate variety on the microstructure and properties of cement-based grouting materials made by sulfoaluminate cement clinker, calcium sulfate resource, and quicklime was investigated in this paper. Isothermal calorimetric, XRD, DTA-TG, and SEM-EDS were used to characterize the reaction process of cement-based grouting materials. The mechanical property and expansion of the harden body were also tested. The results showed that (1) the formation of ettringite can be completed during the first 2?h when gypsum was selected, causing nonexpansion of the harden body, and ettringite tends to be precipitated near the clinker grain, which has a negative influence on the “skeleton effect” of ettringite, resulting in lower strength of the hardened body. (2) Ettringite can be continually and slowly precipitated when an anhydride was chosen, and the hardened body shows significant expansion characteristic. Besides, ettringite in anhydride paste tends to be precipitated in the form of complex interleaving, which can generate a positive influence on mechanical property of the hardened paste.
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机译：本文研究了硫酸氢钙品种对水泥基水泥熟料，硫酸钙资源和新光线的基于水泥基灌浆材料的微观结构和性能的影响。等温量热量，XRD，DTA-TG和SEM EDS用于表征水泥基灌浆材料的反应过程。还测试了硬质体的机械性能和膨胀。 The results showed that (1) the formation of ettringite can be completed during the first 2?h when gypsum was selected, causing nonexpansion of the harden body, and ettringite tends to be precipitated near the clinker grain, which has a negative influence on the Ettringite的“骨架效应”，导致硬质体的较低强度。 (2) Ettringite can be continually and slowly precipitated when an anhydride was chosen, and the hardened body shows significant expansion characteristic.此外，酸酐糊中的Ettringite倾向于以复杂的交织的形式沉淀，这可以产生对硬化浆料的力学性能产生阳性影响。
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