文章摘要
张 杰,石伟斌,王海军.钢渣粉对混凝土性能的影响及微观机理研究[J].水泥工程,2026,39(4):69-72
钢渣粉对混凝土性能的影响及微观机理研究
Study on the properties and micro-mechanism of steel slag powder on concrete
  
DOI：
中文关键词: 钢渣  混凝土  抗压强度  干缩性能  抗冻性  微观机理
英文关键词: steel slag  concrete  compressive strength  drying shrinkage performance  frost resistance  microscopic mechanism
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作者单位
张 杰 建科环能科技有限公司 
石伟斌 建研院检测中心有限公司 
王海军 建研院检测中心有限公司 
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中文摘要:
      为了降低钢渣废弃物对环境的影响，本文探究了磨细钢渣粉作为水泥掺合料对混凝土抗压强度、抗冻耐久性和收缩特性的影响，并研究了钢渣粉在混凝土中的微观机理。结果表明：掺钢渣粉的混凝土抗压强度（7 d~90 d）、干缩性能及抗冻性均得到提升，钢渣粉最佳掺量为15%；钢渣粉掺量为15%的混凝土90 d抗压强度为56.4 MPa，180 d收缩率为507.36×10-6，150次冻融循环质量损失率为4.0%，冻融后抗压强度为28.9 MPa；与不掺加钢渣粉的混凝土相比，钢渣粉掺量为15%的混凝土试件90 d抗压强度升高16.0%，180 d收缩率降低16.1%，150次冻融循环质量损失降低1.2%；钢渣粉可以参与水泥基材料的水化反应，生成 C-S-H 凝胶，可以填充混凝土内部的微观孔隙，因此钢渣粉混凝土的孔洞更少、结构更致密。
英文摘要:
      To mitigate its environmental impact, this study investigated the effects of ground steel slag powder used as a cementitious admixture on the compressive strength, frost resistance, and shrinkage behavior of concrete, and further examined its microscopic mechanism of action in concrete. The results indicate that the incorporation of steel slag powder improves the compressive strength （7~90 d）, drying shrinkage performance, and frost resistance of concrete, with the optimum replacement level being 15%. Concrete containing 15% steel slag powder exhibited a 90 d compressive strength of 56.4 MPa, a 180 d shrinkage strain of 507.36 × 10−6, and a mass loss of 4.0% after 150 freeze–thaw cycles, at which point its compressive strength remained 28.9 MPa. Compared with concrete without steel slag powder, the concrete containing 15% steel slag powder showed a 16.0% increase in 90 d compressive strength, a 16.1% reduction in 180 d shrinkage strain, and a 1.2% decrease in mass loss after 150 freeze–thaw cycles. Steel slag powder can participate in the hydration reaction of cement-based materials and generate C–S–H gel, which helps fill the internal micropores of concrete. As a result, concrete incorporating steel slag powder contains fewer voids and exhibits a denser microstructure.
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