不同形貌水化硅酸钙的制备及其对水泥水化性能的影响

The preparation of calcium silicate hydrate(C-S-H) with different morphology and the effect on hydration properties of cement

采用沉淀法制备形貌分别为类纤维状、类球形堆叠状及团聚锡箔状的水化硅酸钙(C-S-H),并探究了不同形貌C-S-H对水泥水化产物形貌及水泥性能的影响。结果表明:不同形貌的C-S-H对水泥浆体的微观形貌有调控作用;C-S-H能有效缩短凝结时间,加快水泥水化速度,并提高水泥浆体的早期强度,其中纤维状的C-S-H分散性最好,对水泥性能的提高效果最为显著。

Calcium silicate hydrate （C-S-H） with different morphology was synthesized by precipitation method. There are three different types of morphology：the class fibrous,the spherical stacked and reunion foil. And the effect of different morphology of C-S-H on morphology of cement hydrated productsand cement performance was studied. The results show that C-S-H with dif ferent morphology can regulate the murphology of cement hydration products.Adding C-S-H can effectively shorten the setting time, speed up the cement hydration and improve the early strength of cement paste. The morphology of fibrous C-S-H with the best dispersion have the most significant effect on the cement perforumace.