水玻璃固化冰碛物的强度及固结机理分析

Strength and Consolidation Mechanism of Glacial Moraine Solidified with Water Glass

为解决普朗铜矿在开采过程中地表松散冰碛物堆积造成地面塌陷和泥石流的问题,本文采用水玻璃复合酯类固化剂制备固结材料固结冰碛物,对冰碛物固结体的抗压强度进行了研究,并通过XRD、FTIR、DSC-TG和SEM对水玻璃复合酯类固化剂固结材料固结冰碛物的固结机理进行了探究。结果表明,冰碛物固结体28 d抗压强度最高可达2.05 MPa,具有较好的固结性能。酯类固化剂作用下,水玻璃水解产物与酯类固化剂的水解产物反应生成乙酸钠和硅凝胶,硅凝胶起到了填充冰碛物颗粒之间的空隙、胶结冰碛物颗粒的作用。

In order to solve the problem of ground collapse and mudslide caused by the accumulation of loose moraine on the surface of Pulang copper mine in the process of mining,this article prepared a solidified material to solidify moraine with water glass composite ester curing agent.The compressive strength of moraine solidified body was studied,and the consolidation mechanism of water glass composite ester curing agent for consolidating moraine was explored through XRD,FTIR,DSC-TG and SEM.The results show that the moraine solidified body 28 d compressive strength can reach up to 2.05 MPa,indicating good consolidation performance.Under the action of ester curing agent,the hydrolysate of water glass reacts with the hydrolysate of ester curing agent to produce sodium acetate and silicon gel,and silicon gel plays a role in filling the gap between moraine particles and cementing moraine particles.