欢迎访问《金属矿山》杂志官方网站,今天是 分享到:

金属矿山 ›› 2016, Vol. 45 ›› Issue (10): 189-192.

• 综合利用 • 上一篇    下一篇

钢渣粉对全固废混凝土强度的影响

刘轩1,2,崔孝炜1,2,3,倪文1,2,马旭明1,2   

  1. 1.北京科技大学土木与环境工程学院,北京100083;2.工业典型污染物资源化处理北京市重点实验室,北京 100083;3.商洛学院陕西省尾矿资源综合利用重点实验室,陕西 商洛 726000
  • 出版日期:2016-10-15 发布日期:2016-11-04
  • 基金资助:

    基金项目:国家高技术研究发展计划(863计划)项目(编号:2012AA62405)。

Influence of Steel Slag Powder on Strength of Concrete With Industrial Solid Wastes

Liu Xuan1,2,Cui Xiaowei1,2,3,Ni Wen1,2,Ma Xuming1,2   

  1. 1.College of Civil and Environment Engineering,University of Science and Technology Beijing,Beijing 100083,China;2.Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants,Beijing 100083,China;3.Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources,Shangluo University,Shangluo 726000,China
  • Online:2016-10-15 Published:2016-11-04

摘要: 以钢渣粉、矿渣、脱硫石膏为胶凝材料完全替代水泥熟料制备全固废混凝土,考察钢渣粉比表面积和掺量对全固废混凝土抗压强度的影响。结果表明:随着钢渣比表面积的增加,混凝土抗压强度逐渐提高;水化早期钢渣粉对混凝土抗压强度增长贡献小于矿渣粉;在钢渣比表面积为640 m2/kg,钢渣粉、矿渣粉、脱硫石膏粉分别占胶凝材料总质量的25%、63%、12%时,制备的全固废混凝土抗压强度最高。钢渣、矿渣、脱硫石膏相互作用,促进了钙矾石和C-S-H凝胶的形成和生长;钙矾石的生成是混凝土早期强度的主要来源,在水化反应后期,钙矾石和C-S-H凝胶相互交织,形成致密结构有利于混凝土抗压强度提高。

关键词: 钢渣, 矿渣, 混凝土, 水化机理

Abstract: Solid waste concrete was prepared using slag,steel slag,desulfurization gypsum cementing materials entirely replace cement clinker as binding material,influence of steel slag specific surface area and steel slag proportion on the comprehensive strength of the concrete was researched.The results showed that:increasing the specific surface area of steel slag,the compressive strength of concrete increases gradually.Steel slag powder on the early time comprehensive strength of concrete is less than that of slag powder.When the specific surface area of steel slag is 640 m2/kg,proportion of steel slag powder,slag powder,desulfurization gypsum accounted for 25%,63%,12% cementing materials respectively,the concrete compressive strength is the highest.Steel slag,slag and desulfurization gypsum interact with each other,promoting the formation and growth of ettringite and C-S-H gel; Ettringite formation is the main source of solid waste concrete early strength,in the late hydration reaction,ettringite and C-S-H gel intertwined and form a compact structure,which can increase the strength of the concrete with industrial solid wastes.

Key words: Steel slag, Blast furnace slag, Concrete, Hydration