将钼尾矿、矿渣、熟料、石膏进行机械力粉磨,制备胶凝材料,研究了减水剂种类和掺量对胶砂力学性能的影响,并对掺钼尾矿胶凝材料的水化产物进行了分析.结果表明,在相同流动度条件下制备胶砂试块,PC减水剂对掺钼尾矿胶砂的强度提高幅度最大,FDN次之,UNF-5最小.当PC高效减水剂掺量为0.4%时,大掺量尾矿胶砂试块28 d的抗压强度可以达到48.8 MPa.粉磨后的钼尾矿表现出一定的火山灰反应活性.掺钼尾矿胶凝材料的水化产物主要是钙矾石和水化硅酸钙凝胶.
A cementitious material was prepared with blended powders including molybdenum tailings, slag, clinker and gypsum.The effect of different types and dosage of super plasticizer on strengths and hydration products of molybdenum-tailing-based mortars was studied.The results indicate that the strength of mortars with the same fluidity is improved when super plasticizer is present in samples.The biggest improvement is PC super plasticizer, next one is FDN and the last one is UNF-5.When the dosage of PC super plasticizer is 0.4%, the compressive strength of molybdenum-tailing-based mortars is high up to 48.8 MPa at 28 d.The ground molybdenum tailings have a certain reactivity in the studied system.The hydration products of cementitious materials prepared with molybdenum tailings are mainly ettringite and C-S-H gel.
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