环氧涂层钢筋-海砂再生混凝土黏结性能研究  

Experimental study on the bond of epoxy-coated reinforcement to sea sand recycled concrete

作　　者：黄一杰[1] 张宜健 刘世鹏 高旭 亓习博 HUANG Yijie;ZHANG Yijian;LIU Shipeng;GAO Xu;QI Xibo(Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation,Shandong University of Science and Technology,Qingdao 266590,China;Shandong Huitong Construction,Jinan 250031,China)

机构地区：[1]山东科技大学山东省土木工程防灾减灾重点实验室,山东青岛266590 [2]山东汇通建设集团有限公司,山东济南250031

出　　处：《混凝土》2023年第1期17-20,共4页Concrete

基　　金：国家自然科学基金项目(51978389,51408346);中国博士后特别资助项目(2016T90641)。

摘　　要：为研究海砂再生混凝土与环氧涂层钢筋间的黏结性能,考虑了不同钢筋类型、混凝土类型、保护层厚度、混凝土强度和锚固长度等因素对黏结性能的影响,对制作的黏结滑移试件进行了中心拉拔试验。结果表明:相同条件下,黏结强度按照普通混凝土、海砂再生混凝土和再生混凝土的顺序依次降低。海砂再生混凝土试件的黏结-滑移曲线与其他试件的相类似,可分为微滑移段、滑移段和下降段。最后,推导出海砂再生混凝土与环氧涂层钢筋间的黏结滑移本构关系表达式,试验值与理论计算值吻合良好,可用于理论分析。Inorder to study the bond properties between the sea sand recycled concrete(SSRC)and the epoxy-coated reinforcement(ECR),considering the effects of different concrete type,concrete strength grade,bonding length,type of steel bar,and the thickness of the protective layer,the pull-out tests were performed.The results show that,under the same conditions,the bonding strength decreases in the order of ordinary concrete,seawater and sea sand recycled concrete and recycled concrete.The bond-slip curve of SSRC to ECR was similar to that of other specimens.Finally,the expression of the bond-slip constitutive relationship between SSRC and ECR was proposed.It can be used for theoretical analysis.

关 键 词：海砂再生混凝土 环氧涂层钢筋 黏结性能 黏结-滑移曲线 本构关系 

分 类 号：TU528.571[建筑科学—建筑技术科学]