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 , Qin Zhang , Jia Li , Wen-Jie Li , Jun Huang , 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.
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.