用于屋顶的轻骨料植生型混凝土配合比设计研究

发布时间：2018-06-24 05:48

本文选题：轻骨料植生型混凝土 + 目标孔隙率　；参考：《四川建筑科学研究》2017年04期

【摘要】：为了确定应用于屋顶的轻骨料植生型混凝土的最佳配合比,通过试验对目标孔隙率、水胶比、矿物掺合料等因素对轻骨料植生型混凝土的强度、实测孔隙率、pH值等性能的影响进行了研究。试验结果表明:随目标孔隙率增大,轻骨料植生型混凝土强度降低,实测孔隙率与目标孔隙率偏离度增加,pH值有所降低;随水胶比增大,实测孔隙率增大,轻骨料植生型混凝土强度持续降低,pH值略有降低;掺入矿物掺合料后pH值均有一定程度的下降,单掺沸石粉或复掺掺合料pH值降低效果明显。本试验最佳配合比:目标孔隙率30%,水胶比0.30,沸石粉掺量25%或复掺粉煤灰20%+沸石粉15%+硅灰5%,轻骨料植生型混凝土在强度、孔隙率、pH值方面能取得良好的综合性能。
[Abstract]:In order to determine the optimum mix ratio of lightweight aggregate planting type concrete used in roof, the strength of light aggregate planting type concrete was studied by experiments, such as target porosity, water binder ratio, mineral admixture and so on. The effect of measured porosity and pH value on the properties was studied. The experimental results show that with the increase of the target porosity, the strength of the lightweight aggregate plant-type concrete decreases, the measured porosity increases and the pH value decreases, and the measured porosity increases with the increase of the water-binder ratio. The strength of lightweight aggregate plant-type concrete decreases slightly, and the pH value decreases to a certain extent after the mineral admixture is added, and the pH value of single or compound admixture decreases obviously. The optimum mix ratio of this test is as follows: target porosity 30%, water-binder ratio 0.30, boiling stone 25% or fly ash 20% boiling stone 15% silica fume 5. The lightweight aggregate planting type concrete can obtain good comprehensive properties in terms of strength, porosity and pH value.
【作者单位】：西南交通大学土木工程学院;
【分类号】：TU528.2

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