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为了解决钢纤维全轻混凝土现场浇筑时轻粗骨料上浮、钢纤维下沉等施工问题,以水灰比、钢纤维体积率和粉煤灰替代水泥率为变化参数,研究了大流动性钢纤维全轻骨料粉煤灰混凝土的配合比和工作性能;确定了采用P·O 52.5水泥、密度等级900的陶粒、陶砂和Ⅱ级粉煤灰配制密度等级1 700、强度等级LC35的大流动性钢纤维全轻骨料粉煤灰混凝土的配合比;进行了烘干后立方体试块抗压强度试验,分析了钢纤维全轻骨料粉煤灰混凝土受烘干效应影响的立方体抗压强度损失率.
In order to solve the construction problems such as light coarse aggregate floating and sinking of steel fiber during on-site pouring of all-steel steel lightweight concrete, the paper takes the water-cement ratio, the volume fraction of steel fiber and the fly ash instead of the cement ratio as the changing parameters, Fiber mixes and workability of fly ash concrete with full weight of light weight, and determined the density of 1 700 and the strength grade LC35 using P · O 52.5 cement, ceramsite of density grade 900, ceramsite and grade Ⅱ fly ash Large liquid steel fiber light weight aggregate fly ash concrete mix ratio; After drying cubes block compressive strength test, analysis of steel fiber light weight aggregate fly ash concrete affected by the drying effect of the cubic resistance Pressure loss rate.