氯氧镁水泥道路混凝土弯曲增韧性能研究

发布时间：2019-03-08 10:34

【摘要】：为提高氯氧镁水泥(简称镁水泥)混凝土的弯曲韧性,将0.25%、0.5%、0.75%、1%聚丙烯纤维及0.5%、1%、1.5%钢纤维分别掺入镁水泥砂浆中,测试其7 d抗折抗压强度及对应的荷载-挠度韧性指数,通过试验测试结果分析各自增韧效果,并在镁水泥混凝土中作进一步验证。结果表明:掺加聚丙烯纤维与钢纤维均可以增加镁水泥混凝土的强度;当单掺0.8%聚丙烯纤维或单掺1%钢纤维时,对镁水泥混凝土韧性增强效果最好;当混掺1%钢纤维+0.8%聚丙烯纤维时,镁水泥混凝土的韧性增强效果较好。
[Abstract]:in order to improve the flexural toughness of the magnesium oxychloride cement (hereinafter referred to as the magnesium cement) concrete, 0.25%, 0.5%, 0.75%,1% of polypropylene fiber and 0.5%,1% and 1.5% steel fiber are respectively added into the magnesium cement mortar to test the 7 d flexural strength and the corresponding load-deflection toughness index, The respective toughening effects were analyzed by the test results and further verified in the magnesium cement concrete. The results show that the strength of the magnesium cement concrete can be increased by adding the polypropylene fiber and the steel fiber, and when the single-mixed 0.8% polypropylene fiber or 1% steel fiber is mixed, the strength of the magnesium cement concrete is the best; when the mixed 1% steel fiber + 0.8% of the polypropylene fiber is mixed, And the toughness of the magnesium cement concrete is better.
【作者单位】： 长安大学交通铺面材料教育部工程研究中心;
【基金】：国家自然科学基金(51308062) 青海省科技计划项目(2014-GX-A2A) 大学生创新创业训练计划项目(201610710092)
【分类号】：U414
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本文编号：2436718