纤维复材增强混凝土抗冻融循环试验及性能分析  

Freeze-thaw cycle resistance test and performance analysis of fiber composite reinforced concrete

作　　者：周玉琴 陈佳瑞 柯莉 ZHOU Yuqin;CHEN Jiarui;KE Li(Sichuan Institute of Industrial Technology,Deyang 618000,Sichuan China)

机构地区：[1]四川工业科技学院建筑工程学院,四川德阳618000

出　　处：《粘接》2024年第6期68-72,共5页Adhesion

摘　　要：为保障混凝土材料在高寒环境下的使用寿命,制备3组混凝土材料,一组作为对比组不使用加固材料,其他2组分别采用碳纤维复合材料进行条带式加固与全包裹式加固,采用冻融循环试验方法,测试试件在冻融循环过程中的性能变化,及冻融循环后的力学性能。结果表明,未加固的混凝土试件质量损失率、水量损失率均处于较高水平,且该试件的相对动弹性模量下降幅度较大,从而影响其抗冻融效果;采用碳纤维复合材料全包裹方式加固的混凝土质量、水量损失较小,有效粘接长度也并未发生较大变化,且该组试件在冻融循环后的力学性能同样保持良好,采用碳纤维复合材料全包裹方式加固后的混凝土抗冻融效果更强。In order to ensure the service life of concrete materials in high cold environment and enhance the stabili⁃ty and reliability of concrete,three groups of concrete materials were prepared,one group was used as the compari⁃son group without reinforcement materials,and the other two groups were respectively reinforced with carbon fiber composite materials in strip type and fully wrapped type.The freeze-thaw cycle test method was used to test the per⁃formance changes of the prepared specimens during the freeze-thaw cycle,and the mechanical properties of the specimens after the freeze-thaw cycle were tested through the loading device.The test results showed that the mass loss rate and water loss rate of the unreinforced concrete specimen were at a relatively high level,and the relative dynamic elastic modulus of the specimen decreased greatly,thus affecting its freeze-thaw resistance effect.The con⁃crete reinforced by full encapsulation of carbon fiber composite materials had less loss of mass and water,and the ef⁃fective bonding length had not changed greatly.Moreover,the mechanical properties of this group of samples also maintained good after freeze-thaw cycle.The freeze-thaw resistance of concrete reinforced by carbon fiber compos⁃ite was stronger.

关 键 词：碳纤维加固混凝土 抗冻融性能 质量损失率 有效粘接长度 抗折强度 

分 类 号：TU528[建筑科学—建筑技术科学] TQ528[化学工程—煤化学工程]