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Relation between Porosity and Compressive Strength of Slag Concrete

机译:矿渣混凝土孔隙率与抗压强度的关系。

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This research aims to investigate the pore structures characteristics of slag concrete and itscorrelation with the compressive strength. In the study, three water/binder ratios (0.35, 0.50,0.70) and three substitute ratios of cement with slag (10%, 20%, 40%) were selected forpreparing concrete specimens. The specimens were tested at five ages (1-56 days) forcompressive strength and MIP porosity measurement. Test results show that the larger thewater/binder is, the more the total pore volume and capillary pore volume of slag concrete willbe. At early ages, the pore volume of slag concrete is greater than that of plain concrete, while atlater ages, the pore volume of slag concrete will decrease gradually, and the larger the slagsubstitute ratio is, the less the pore volume will be. Moreover, the compressive strength of slagconcrete has a close correlation with both the total pore volume and capillary pore volume(0.01μm~10μm), in which a closer correlation stands for the bigger capillary pore volume(0.1μm~10μm). Therefore, using the bigger capillary pore volume to predict the compressivestrength of slag concrete can reach to an optimum result.
机译:本研究的目的是研究矿渣混凝土的孔结构特征及其机理。 与抗压强度相关。在这项研究中,三种水/粘合剂比率(0.35、0.50, 选择0.70)和三种替代比例的矿渣水泥(10%,20%,40%) 准备混凝土标本。在五个年龄(1-56天)测试样本 抗压强度和MIP孔隙率测量。测试结果表明,较大的 水/粘合剂是,矿渣混凝土的总孔体积和毛细孔体积越大 是。在早期,矿渣混凝土的孔体积大于普通混凝土的孔体积,而在 后期,矿渣混凝土的孔体积会逐渐减小,矿渣越大 替代比是,孔体积将越小。而且,炉渣的抗压强度 混凝土与总孔体积和毛细孔体积都密切相关 (0.01μm〜10μm),其中更紧密的相关性代表更大的毛细孔容积 (0.1μm〜10μm)。因此,使用较大的毛细孔体积来预测压缩力 矿渣混凝土的强度可以达到最佳效果。

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