水胶比对铁尾矿混凝土强度的影响

将鞍钢齐大山铁矿尾矿与高炉矿渣、水泥熟料、脱硫石膏进行3级混磨，形成胶凝材料，然后将胶凝材料与作为骨料的原始粒级铁尾矿混合，并加入减水剂制备成无粗骨料的高强混凝土材料。研究了水胶比对混凝土强度的影响，并通过SEM对水化产物及微观结构进行了分析。试验结果表明，随着水胶比的增大，混凝土的流动度也增大，但抗折强度和抗压强度均呈现下降趋势；结合实际生产需要，利用齐大山铁尾矿制备混凝土最合适的水胶比为0.24。

Effects of Water-bincler Ratio on Strength of Concrete With Iron Ore Tailings

Ansteel Qidashan iron tailings with slag，natural gypsum and cement clinker are mixed，and produced cementitious materials.And then the cementitious materials are mixed with original tailing，and became high-strength concrete materials by adding water-reducing agent.The effects of water cement ratio on the strength of concrete is researched.And the microstructure of hydration products is analyzed by SEM.The experiments indicate that，with the water-bincler ratio increases，the fluidity of concrete is also increased，but the flexural strength and compressive strength have shown a gradual decreasing trend.With actual production needs，making with Qidashan iron tailings，the suitable concrete water cement ratio is 0.24.