工业固废开发充填胶凝材料概述与应用展望

Review and Application Prospect of Filling Cementitious Material Developed by Industrial Solid Waste

从材料和研究方法角度总结了利用固废开发充填胶凝材料的研究现状,将工业固废划分为潜在活性材料及惰性激发材料两个部分;固废应用于矿山充填,主要机理是以矿渣为基本组分,通过添加其他固废材料或激发剂,促使其水化反应,生成主要胶凝物质钙矾石与凝胶;选取不同工业副产石膏,开展了钢渣-矿渣-石膏全固废超细全尾充填胶结体强度试验,结果表明,石膏种类对充填体强度及体积膨胀率影响不大,钢渣掺量40%,石膏掺量12%以上时,充填胶结体强度均达到2.5 MPa以上,钢渣-矿渣-石膏全固废胶凝材料可应用于超细全尾砂胶结充填。

From the perspective of materials and research methods,the research progress of using solid waste to develop filling cementitious materials was summarized.Industrial solid waste can be divided into two parts,including potential active material and inert exciting material.At present,solid waste is applied to mine filling.The main mechanism is to use slag as the basic component and to promote hydration reaction by adding other solid waste materials or activators.Thus,the main gelling substancesof ettringite and gel can be formed.Selecting different industrial by-product gypsum,the compressive tests on steel slag-ore slag-gypsum full solid waste ultra-fine full tailing filling cemented body were carried out.The results showed that the gypsum type had little effect on the strength and volume expansion rate of the filling body.When the steel slag content was 40%and the gypsum content was more than 12%,the strength of the cemented body was over 2.5 MPa.It was concluded that steel slag-ore slag-gypsum full solid waste cementitious material can be used for ultra-fine full tailings cement filling.