高炉矿渣制备新型胶凝材料的试验研究

高炉矿渣制备新型胶凝材料作为水泥替代剂是资源综合利用的一个重要方向,高炉矿渣在碱性激发剂的条件下能够迅速以及比较完全的发挥其胶凝性能,但碱性激发剂的选取一直是制约新型胶凝剂投入生产实际的一个重要因素。实验室大多使用NaOH激发高炉矿渣的活性,由于NaOH的强腐蚀性,给实际运用带来了危险并加速了仪器的损耗。本文拟利用CaO作为碱激发剂激发高炉矿渣的活性,添加工业石膏探索制备新型胶凝材料的可能性。通过正交实验设计配比并得出最优条件下CaO用量,胶砂比以及石膏用量分别为10%,1:4和5%,最优配比下测得浓度68%试块的抗压强度为5.67 MPa,能够完全满足井下充填的要求。

Experiment of new cementing material based on blast furnace slag

Using blast furnace slag as cement substitute material to prepare novel cementing material is an important direction of comprehensive utilization of resources, it can achieve its cementitiousSbehaviorSpotential more quickly with the help of alkali activator, one important factor to restrict the practical application of production is the alkali activator. NaOH is a widely used alkali activator in laboratory but bring some dangerous to the application and accelerate the instrument loss due to its highly corrosive. Using gypsum as an addictive and CaO as the alkali activator to explore the possibility of prepare the novel cementing material. The best preparation parameters of CaO, cementing material/tailings ratio, gypsum were concluded through orthogonal test. Under the optimal parameter (CaO=10%,cementing material/tailing ratio=1:4, gypsum =5%), the 28 d compressive strength of cement filling material was 5.67MPa, which meets the requirements of backfilling.