纤维亲水性能对改善混凝土抗冻能力的影响  

The influence of fiber hydrophilic to improve the frost resistance of concrete

作　　者：何柏[1] 张生[2] 陈昕 刘刚 刘成 羊鹏 赵元兵 

机构地区：[1]四川大学建筑与环境学院,四川成都610065 [2]四川省交通运输厅交通勘察设计研究院,四川成都610017 [3]四川兴蜀公路建设发展有限责任公司,四川成都610041

出　　处：《四川建筑科学研究》2014年第1期245-248,共4页Sichuan Building Science

摘　　要：纤维的亲水性能对改善混凝土抗冻性能的作用有着重要影响,本文通过快冻法研究了纤维素纤维、聚丙烯纤维混凝土的抗冻性能,探讨了纤维对混凝土抗冻性能的影响。实验结果表明:掺加聚丙烯(憎水性)纤维削弱了混凝土的抗冻性能;而掺加纤维素(亲水性)纤维可以明显改善混凝土的抗冻性能,且随着冻融循环次数的增加,纤维素纤维的作用愈加明显;300次冻融循环后,纤维素纤维混凝土的相对动弹性模量是素混凝土的1.38倍,而质量损失率只有素混凝土的58%。Fiber hydrophilic can have a important impact on improvement of the effect of concrete frost resistance, in this paper, by quick freezing method to research the antifreeze performance of cellulose fiber/polypropylene fiber concrete, probes into the influence of fiber on concrete frost resistance performance. The experimental results show that adding polypropylene fiber （ hydrophobic ） weaken the antifreeze of concrete performance, and adding cellulose （hydrophilic） fiber can obviously improve the antifreeze of concrete performance, and with the increase of freeze-thaw cycles, the role of cellulose fiber are becoming ever more obvious;After 300 cycles of freeze-thaw,relative dynamic elastic modulus of cellulose fiber concrete is 1.38 times of plain concrete,and the mass loss rate is only 58% of the plain concrete.

关 键 词：亲水性 聚丙烯纤维 纤维素纤维 冻融 相对动弹性模量 

分 类 号：TU528.2[建筑科学—建筑技术科学]