熟料细度对硫铝酸盐水泥胶凝膨胀性能的影响

Effect of clinker fineness on gelation and expansion performance of calcium sulphoaluminate cement

采用XRD和TG/DTG等试验方法,对两种不同细度熟料配制成的硫铝酸盐水泥进行研究,通过Rietveld分析法对水化产物进行定量分析,探讨其膨胀性能与水泥粒径及水化产物的关系。结果表明,减小硫铝酸盐水泥熟料平均粒径对提高抗压强度贡献很大,也可促进硫铝酸盐水泥水化,但并不能显著增加试件膨胀率和膨胀持续时间,二水石膏掺量对于硫铝酸盐水泥膨胀性能的影响要大于熟料粒径的影响。

By means of XRD, TG/DTG, the performance of calcium sulphoaluminate cement prepared from two kinds of clinker with different fineness were studied. Using Rietveld method to analyze hydration products, the relationship between the expansion performance and particle size and hydration products of cement were discussed. The results showed that reducing the average particle size distribution of clinker contributes greatly to the development of compressive strength, it could also promote the hydration of cement. However, it could not significantly increase the expansion ratio and expansion duration of specimens. Besides, the effect of dihydrate gypsum content on the expansion performance of calcium sulphoaluminate cement was greater than that of oarticle size of clinker.