高效减水剂对铁尾矿高性能混凝土性能的影响

将北京密云铁尾矿与高炉水淬矿渣、水泥熟料、脱硫石膏通过三段混合磨矿形成胶凝材料，然后将胶凝材料与铁尾矿混合，并加入高效减水剂，制备成高性能混凝土材料，其中铁尾矿总掺量达到70%。固定其它参数与试验条件，改变高效减水剂的种类和掺量，研究高效减水剂对铁尾矿高性能混凝土性能的影响。试验结果表明：聚羧酸系高效减水剂对新拌混凝土的工作性能最有利，掺入UNF-5的硬化混凝土各龄期的抗压强度最高，28 d强度已经达到80 MPa。

Effect of High Efficient Super Plasticizer on Performance of Iron Tailing High-quality Concrete

The cementitious materials was formed by three steps milling of Miyun iron ore tailings with water quenched high furnace slag, cement clinker and desulfurized gypsum, and then was mixed with iron tailings to prepare high performance concrete by adding high efficient super plasticizer, in which the total content of iron tailings was 70% by weight. The effect of high efficient super plasticizer on the concrete samples was studied by varying the types and dosage of super plasticizers when the experimental conditions and other parameters were fixed. The results showed that polycarboxylate-based super plasticizer has good effects on the workability of fresh concrete. The hardened concrete samples blended with UNF-5 own highest compressive strength at each stage and reach 80 MPa at 28 d.