氯氧镁水泥道路混凝土弯曲增韧性能研究  

Study on flexural toughness performance of magnesium oxychloride cement road concrete

作　　者：夏雨[1] 关博文[1] 刘开平[1] 蔡园[1] 

机构地区：[1]长安大学交通铺面材料教育部工程研究中心,陕西西安710061

出　　处：《混凝土》2017年第5期47-50,54,共5页Concrete

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)

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。In order to improve the toughness of the magnesium oxychloride cement concrete（referred to as magnesium cement）,polypropylene fiber of 0.25%,0.5%,0.75%,1%,steel fiber of 0.5%,1%,1.5% were added into magnesium cement mortarrespectively.Test its 7 d flexural and compressive strength and the corresponding load deflection toughness index,through the test results analysis of their toughening effect,and in the magnesium cement concrete for further validation.The experiment shows that adding polypropylene fiber and steel fiber can increase the strength of magnesium cement concrete,when mixed with 0.8% polypropylene fiber or 1% steel fiber,magnesium cement concrete toughness enhancement effect is best.When mixing 1% steel fiber and 0.8% polypropylene fiber,magnesium cement concrete toughness enhancement effect is better.

关 键 词：氯氧镁水泥混凝土 弯曲增韧 聚丙烯纤维 钢纤维 

分 类 号：TU528.01[建筑科学—建筑技术科学]