高含泥尾矿碎屑在预拌砂浆中的应用研究

Application Research on Stone Chips with High Content Tailing in Dry-mixed Mortar

预拌砂浆具有质量优良、减轻污染、生产效率高及可消纳大量固体废弃物等优势,近些年得到大量推广。碎屑是矿石开采产生的废渣,其排放量为碎石产量的20%-30%左右。本文分析了碎屑不同掺量对预拌抹灰砂浆的标准稠度用水量、强度等性能的影响,并对其耐久性如收缩率及抗冻性等进行了研究,从碎屑理化性质等方面论述了相应的作用机理,可为碎屑在预拌砂浆中的大规模应用提供理论依据和技术支持。

Dry-mixed mortar has been used widely due to advantages of stable quality, low pollution and high effi- ciency as well as ability of disposal of wastes. Clastic are byproducts of stone extracting, and the amount is about 20%- 30% of the aggregate. The influences of clastic amount on the strength, water amount, and the durability such as shrinkage and frost-resistance of ready-mixed plastering mortar are analyzed. Meanwhile the mechanism is discussed based on the physicochemical property of clastics. The research can offer some theory evidences and technical support for the scale ap- plications.