硅灰－矿渣粉改性多孔透水混凝土力学及抗冻性能研究

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关键词：硅灰；矿渣粉；多孔透水混凝土；透水系数；力学强度；抗冻性能中图分类号：TU528.3 文献标志码：A 文章编号：1005-8249（2026）02-0035-07DOI：10.19860/j.cnki.issn1005-8249.2026.02.006

Study on Mechanical Properties and Freeze - Thaw Resistance of Silica Fume and Granulated Blast Furnace Slag -Modified Porous Permeable Concrete

BAI Xiaolong，WEI Yalong，BI Hongwei，GAN Hong （Huaneng Yimin Open-pit Mine，Hulunbuir O21234，China）

Abstract：To enhance the mechanical properties and frost resistance of porous pervious concrete （PPC），silica fumeand slag powder wereused topartiallyreplacecementformodification.Theefectsofsingleorcombined incorporationofsilicafumeand slagpowderonthedensity，permeabilitycoeficient，compressivestrength，splitingtensilestrength，andfrostresistanceof PPC were investigated.Theresultsshowedthat incorporating silicafumeorslag powder increases thedensityof PPCandreduces its permeabilitycoeffcient.Theaditionofsilicafumeorslag powderdecreases the7-daycompressiveand splittngtensile strengthsofPPC，hasnosignificanteffctonthe28-daymechanicalstrength，butsignificantlyimprovesthe90-day compressiveand splitingtensilestrengths.Underfreze-thawcycling，theincorporationofsilicafumeorslagpowderhaslitle influenceontheresidualstrengthafter25cyles，whiletheloses inresidualcompressivestrengthandresidualspliting tensile strength after 1OO cycles are smaller than those of the control group. Among the mixes，PPC with 10% silica fume alone exhibits the best frost resistance，followed by the mix with 5% silica fume plus 5% slag powder. The research findings can provide a theoretical basis for the mix design of PPC.

Key words：：silica fume；slag powder；porous pervious concrete；permeability coeficient；mechanical strength；frost resistances

材料科学

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