水泥基纤维复合材料与混凝土的黏结性能试验研究  

Experimental study on the bonding performance between cement based fiber composites and concrete

作　　者：向斌 林欣欣[2] XIANG Bin;LIN Xinxin(Central and Southern China Municipal Engineering Design and Research Institute Co.,Ltd.,Wuhan 430010 China;Xiamen City University,Xiamen 361008 China)

机构地区：[1]中国市政工程中南设计研究总院有限公司,湖北武汉430010 [2]厦门城市职业学院,福建厦门361008

出　　处：《混凝土》2024年第1期120-123,共4页Concrete

摘　　要：为了实现对老旧混凝土结构快速修补的目的,以磷酸镁水泥代替普通硅酸盐水泥,制备了一种高性能水泥基纤维复合修补材料,并以黏结抗拉强度、抗折强度和抗剪强度为评价指标,考察了其与混凝土结构之间的黏结性能。试验结果表明:混凝土的界面粗糙度越大,水泥基纤维复合材料与混凝土之间的黏结抗拉强度、抗折强度和抗剪强度值均先增大后减小,当界面粗糙度为3.5 mm左右时,黏结性能可达到最佳;混凝土基体强度越大,水泥基纤维复合材料与混凝土之间的黏结抗拉强度、抗折强度和抗剪强度值就越大,黏结性能越好。试验制备的水泥基纤维复合材料与混凝土之间的黏结性能较好,能够满足老旧混凝土结构修补施工的需求。In order to achieve the goal of rapid repair of old concrete structures,a high-performance cement-based fiber composite repair material was prepared by replacing ordinary Portland cement with magnesium phosphate cement.The bonding performance between it and concrete structures was investigated by taking the bonding tensile strength,flexural strength and shear strength as evaluation indexes.The test results show that the greater the interface roughness of concrete is,the tensile strength,flexural strength and shear strength of the bond between cement-based fiber composite and concrete first increase and then decrease.When the interface roughness is about 3.5 mm,the bond performance can reach the best.The greater the strength of concrete matrix,the greater the bond tensile strength,flexural strength and shear strength between cement-based fiber composite and concrete,and the better the bond performance.The cement-based fiber composite prepared has good bonding performance with concrete,which can meet the needs of old concrete structure repair construction.

关 键 词：混凝土修补 水泥基纤维复合材料 黏结性能 界面粗糙度 基体强度 

分 类 号：TU528.041[建筑科学—建筑技术科学]