魏 微，高 谦
魏 微，高 谦
Abstract: For replacing traditional cement, a new type of whole-tailing cementitious materials is designed and prepared by using water quenching blast furnace slag as main material as well as lime desulphurization gypsum as composite activator and adding calcium chloride. Using the orthogonal design method of 4 factors×3 levels, the optimal mix proportion for preparing the whole-tailing backfill body were obtained by studying the effects of following factors, such as lime, desulphurization gypsum and calcium chloride. The results show that the 28d strength of the whole-tailing backfilling body is 2.944MPa using the optimum mix proportion, which is 7.5 times than that of 42.5R cementitious backfilling body under the same condition of concentration, cement-sand ratio and ages. Therefore, the whole-tailing cementitious material can replace cement as the cementation material.