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以金川铜冶炼厂铜尾渣及热电厂的脱硫灰作为胶凝材料激发剂,以棒磨砂为骨料,在1∶4胶砂比和78%的重量浓度条件下,进行了铜尾砂新型充填胶凝材料配比的正交实验研究。通过测定试件的3,7,28d单轴抗压强度,主要研究了铜尾渣、脱硫灰及早强剂的活性及对抗压强度的影响。结果显示:金川的铜渣粉是一种惰性固体废弃物,不具有潜在活性,可以作为一种充填料加以应用;芒硝和NaOH作为早强剂对胶凝材料的早期强度作用显著,生石灰和脱硫灰渣对胶凝材料的28d强度作用显著;增加石灰和灰渣掺入量,对提高充填体的强度效果并不是十分显著。对正交分析结果进行回归优化,最终获得了胶凝材料最佳配比:芒硝10%、NaOH 1%、脱硫灰渣20%、石灰5%、铁矿渣64%,此研究为金川铜尾渣和脱硫灰利用提供了理论依据。
Taking the copper tailings of Jinchuan copper smelter and the desulfurized ash of thermal power plant as the activator of cementitious material, the new type of filling of copper tailings was carried out under the conditions of 1: 4 mortar ratio and 78% weight concentration Orthogonal Experimental Study on Cementing Materials. By measuring the uniaxial compressive strength of 3,7,28 d specimens, the effects of copper tailings, desulfurization ash and early strength agent on the compressive strength were studied. The results showed that Jinchuan copper slag was an inert solid waste with no potential activity and could be used as a kind of filling material. Glauber salt and NaOH as early strength agent had a significant effect on the early strength of cementitious material. The quick lime and desulfurization The effect of ash on the 28d strength of the cementitious material is significant. Increasing the lime and ash incorporation is not very significant for increasing the strength of the filler. The results of orthogonal analysis were optimized by regression analysis. The best ratio of cementitious materials was attained: 10% of thenardite, 1% of NaOH, 20% of desulfurized ash, 5% of lime and 64% of iron slag, Slag and desulfurization provide a theoretical basis for the use.