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采用复掺钢渣粉和粉煤灰替代水泥制备混凝土的方式，研究钢渣粉-粉煤灰不同复掺比例对混凝土力学性能与耐久性能的影响。分析钢渣粉-粉煤灰复掺比例分别为1∶9、2∶8、3∶7和4∶6工况下混凝土的抗压强度、弹性模量、碳化深度、电通量以及微观结构的演变规律，阐明掺合料对混凝土力学和耐久性能的改善机理。结果表明，随着复掺掺合料中钢渣粉比例的增加，混凝土在不同龄期下的抗压强度与弹性模量均呈现先增大后减小的变化趋势。当钢渣粉-粉煤灰复掺比例为3∶7时，二者均达到最大值，说明该掺配比例下复合掺合料可有效填充混凝土内部孔隙，从而改善其力学性能。与此同时，混凝土的碳化深度与电通量随复掺体系中钢渣粉比例的增加均表现出先降低后升高的规律，且在钢渣粉-粉煤灰比例为3∶7时均取得最低值，表明在此配比下混凝土具备最优的抗碳化性能与抗离子渗透能力。微观分析表明，适量比例的钢渣粉-粉煤灰复掺产生协同效应，通过细化孔结构和强化界面过渡区，显著提升混凝土的密实度，进而改善其力学性能与耐久性能。
Abstract：The influence of different steel slag powder-fly ash composite ratios on the mechanical properties and durability of concrete was investigated using a method in which cement was partially replaced by steel slag powder and fly ash.Experiments were conducted with steel slag powder-fly ash ratios of 1∶9,2∶8,3∶7,and 4∶6,and the evolution of compressive strength, elastic modulus, carbonation depth, electrical flux, and microstructure of concrete was analyzed.The mechanism by which the admixtures enhance the mechanical and durability properties of concrete was elucidated.Results indicate that as the proportion of steel slag powder in the composite admixture increases, the compressive strength and elastic modulus at different ages first increase and then decrease, reaching their peak values at a steel slag powder-fly ash ratio of 3∶7.This suggests that the composite admixture at this ratio effectively fills the internal pores of the concrete, thereby improving its mechanical properties.Meanwhile, both the carbonation depth and electrical flux exhibit a trend of first decreasing and then increasing with the rising SSP content, with the minimum values also observed at the steel slag powder-fly ash ratio of 3∶7,indicating optimal carbonation resistance and chloride ion penetration resistance at this proportion.Microscopic analysis further reveals that the appropriate steel slag powder-fly ash co-blending produces a synergistic effect, refining the pore structure and strengthening the interfacial transition zone, which significantly enhances the density of the concrete and consequently improves its mechanical properties and durability.
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基本信息:
中图分类号:TU528
引用信息:
[1]熊黎明,程想,岳子栋,等.钢渣粉-粉煤灰复掺对混凝土力学性能与耐久性能的影响[J].四川建材,2026,52(09):6-10.
基金信息:
中国建筑第二工程局科技资助项目(2023ZX120001)
2026-09-10
2026-09-10