矿物外掺合料对箱梁C50混凝土工作及力学性能影响
发布时间：2019-06-27 10:13
【摘要】：利用粉煤灰/矿渣粉作为复合外掺料等量替代部分水泥,探究外掺合料的组成及掺量对箱梁C50混凝土工作性及力学性能的影响,并通过SEM观察混凝土微观结构,结果表明:复合掺合料中,粉煤灰与矿渣粉最佳质量比为1∶2。外掺合料掺量从0%增至30%过程中,C50混凝土工作性有所改善,但混凝土3 d、10 d、28 d、56 d强度均随外掺合料掺量增加而降低。通过SEM观察,掺外掺合料体系水化生成的C-S-H凝胶数目较少,使得混凝土界面粘接强度不高,导致抗压强度降低。
[Abstract]:Fly ash / slag powder is used as composite admixture to replace part of cement. The effect of composition and content of external admixture on workability and mechanical properties of box girder C50 concrete is investigated. The microstructure of concrete is observed by SEM. The results show that the optimum mass ratio of fly ash to slag powder is 1 鈮，
本文编号：2506708
[Abstract]:Fly ash / slag powder is used as composite admixture to replace part of cement. The effect of composition and content of external admixture on workability and mechanical properties of box girder C50 concrete is investigated. The microstructure of concrete is observed by SEM. The results show that the optimum mass ratio of fly ash to slag powder is 1 鈮，
本文编号：2506708
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