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金属矿山 ›› 2011, Vol. 40 ›› Issue (11): 166-168.

• 综合利用 • 上一篇    

水胶比对铁尾矿混凝土强度的影响

崔孝炜,倪文,吴辉   

  1. 北京科技大学土木与环境工程学院
  • 出版日期:2011-11-15 发布日期:2011-11-17

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

Cui Xiaowei,Ni Wen,Wu Hui   

  1. School of Civil and Environmental Engineering,University of Science and Technology Beijing
  • Online:2011-11-15 Published:2011-11-17

摘要: 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。

关键词: 铁尾矿, 混凝土, 水胶比

Abstract: 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.

Key words: Iron ore tailings, Concrete, Water-bincler ratio