Experimental study on bond properties between corroded grout sleeves and concrete in a chloride environment

IF 4.3 2区 工程技术 Q1 ENGINEERING, CIVIL
Qing-long Wang , Qin Zhang , Jia Li , Wen-Jie Li , Jun Huang , Hai-Tao Zhao
{"title":"Experimental study on bond properties between corroded grout sleeves and concrete in a chloride environment","authors":"Qing-long Wang ,&nbsp;Qin Zhang ,&nbsp;Jia Li ,&nbsp;Wen-Jie Li ,&nbsp;Jun Huang ,&nbsp;Hai-Tao Zhao","doi":"10.1016/j.istruc.2025.110227","DOIUrl":null,"url":null,"abstract":"<div><div>To study the bond mechanism between corroded grout sleeves and concrete, 18 grout sleeve concrete bond specimens were prepared for central pull-out tests. Three key parameters, including corrosion levels, grout sleeve diameters, and protective layer thicknesses, were evaluated. The results revealed that the bond properties between grout sleeves and concrete were significantly degraded as corrosion levels increased, and the bond strength was decreased by up to 84.54 % compared to the specimens without corrosion in this study. Meanwhile, the bond specimens exhibited penetrating cracks due to the corrosion of grout sleeves with the relatively large diameters, and pronounced macro-penetrating cracks were observed when the corrosion level was approximately 5 %. Finally, to predict the bond stress-slip responses between corroded grout sleeves and concrete, an analytical model was developed. The proposed predictive model shows excellent agreement with the measured bond stress-slip curves, which also demonstrates better applicability than existing bond-slip models proposed on the basis of studies on concrete and corroded reinforcing bars with the relatively small diameters.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"81 ","pages":"Article 110227"},"PeriodicalIF":4.3000,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Structures","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2352012425020429","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}
引用次数: 0

Abstract

To study the bond mechanism between corroded grout sleeves and concrete, 18 grout sleeve concrete bond specimens were prepared for central pull-out tests. Three key parameters, including corrosion levels, grout sleeve diameters, and protective layer thicknesses, were evaluated. The results revealed that the bond properties between grout sleeves and concrete were significantly degraded as corrosion levels increased, and the bond strength was decreased by up to 84.54 % compared to the specimens without corrosion in this study. Meanwhile, the bond specimens exhibited penetrating cracks due to the corrosion of grout sleeves with the relatively large diameters, and pronounced macro-penetrating cracks were observed when the corrosion level was approximately 5 %. Finally, to predict the bond stress-slip responses between corroded grout sleeves and concrete, an analytical model was developed. The proposed predictive model shows excellent agreement with the measured bond stress-slip curves, which also demonstrates better applicability than existing bond-slip models proposed on the basis of studies on concrete and corroded reinforcing bars with the relatively small diameters.
氯离子环境下腐蚀灌浆套筒与混凝土粘结性能试验研究
为研究受腐蚀的灌浆套筒与混凝土的粘结机理,制作了18个灌浆套筒混凝土粘结试件进行中心抽拔试验。评估了三个关键参数,包括腐蚀水平、灌浆套筒直径和保护层厚度。结果表明,随着腐蚀程度的增加,灌浆套与混凝土之间的粘结性能明显下降,与未腐蚀的试件相比,粘结强度下降高达84.54 %。同时,由于直径较大的浆液套的腐蚀,粘结试件出现了穿透性裂纹,当腐蚀水平约为5 %时,出现了明显的宏观穿透性裂纹。最后,为了预测腐蚀的灌浆套筒与混凝土之间的粘结应力-滑移响应,建立了分析模型。该预测模型与实测黏结应力-滑移曲线吻合良好,适用性优于现有的基于直径较小的混凝土和锈蚀钢筋的黏结滑移模型。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Structures
Structures Engineering-Architecture
CiteScore
5.70
自引率
17.10%
发文量
1187
期刊介绍: Structures aims to publish internationally-leading research across the full breadth of structural engineering. Papers for Structures are particularly welcome in which high-quality research will benefit from wide readership of academics and practitioners such that not only high citation rates but also tangible industrial-related pathways to impact are achieved.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信