Influence of Reinforcing Rebar on Expansion due to Delayed Ettringite Formation along the Bonding Length – Part I: The Role of Bond on Expansive Behavior of Concrete

IF 1.6 4区 工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY Journal of Advanced Concrete Technology Pub Date : 2023-11-09 DOI:10.3151/jact.21.851
Yuichiro Kawabata, Taito Miura, Misato Fujishima, Naoshi Ueda, Yuya Takahashi, Shingo Asamoto, Stéphane Multon, Renaud-Pierre Martin, Jean-Francois Seignol
{"title":"Influence of Reinforcing Rebar on Expansion due to Delayed Ettringite Formation along the Bonding Length – Part I: The Role of Bond on Expansive Behavior of Concrete","authors":"Yuichiro Kawabata, Taito Miura, Misato Fujishima, Naoshi Ueda, Yuya Takahashi, Shingo Asamoto, Stéphane Multon, Renaud-Pierre Martin, Jean-Francois Seignol","doi":"10.3151/jact.21.851","DOIUrl":null,"url":null,"abstract":"This paper explores the effects of rebar as an internal restraint on the expansion of delayed ettringite formation (DEF) in concrete. Concrete specimens embedded with steel bars without end plates are subjected to heat treatment followed by immersion in water. The effect of stirrups on expansion is also investigated. The results show that the longitudinal expansion of specimens without stirrups differs depending on the longitudinal position, owing to the different degrees of restraint resulting from stress in the steel bar. The final transverse expansions of the specimens without stirrups are close to those measured for stress-free specimens. Conversely, longitudinal and transverse expansions are significantly reduced in the specimens with stirrups. This indicates that the combination of a longitudinal steel bar and stirrups induces three-dimensional confinement stresses that help to limit DEF expansion in both the longitudinal and transverse directions. Furthermore, possible debonding along the longitudinal bar is observed in specimens without stirrups when the transverse expansion of the prismatic specimens is 0.4 to 0.6%. This behavior is not observed in the specimens with stirrups, which demonstrates the effectiveness of three-dimensional restraints in significantly mitigating the risk of debonding, as well as DEF expansion.","PeriodicalId":14868,"journal":{"name":"Journal of Advanced Concrete Technology","volume":null,"pages":null},"PeriodicalIF":1.6000,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Advanced Concrete Technology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3151/jact.21.851","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
引用次数: 1

Abstract

This paper explores the effects of rebar as an internal restraint on the expansion of delayed ettringite formation (DEF) in concrete. Concrete specimens embedded with steel bars without end plates are subjected to heat treatment followed by immersion in water. The effect of stirrups on expansion is also investigated. The results show that the longitudinal expansion of specimens without stirrups differs depending on the longitudinal position, owing to the different degrees of restraint resulting from stress in the steel bar. The final transverse expansions of the specimens without stirrups are close to those measured for stress-free specimens. Conversely, longitudinal and transverse expansions are significantly reduced in the specimens with stirrups. This indicates that the combination of a longitudinal steel bar and stirrups induces three-dimensional confinement stresses that help to limit DEF expansion in both the longitudinal and transverse directions. Furthermore, possible debonding along the longitudinal bar is observed in specimens without stirrups when the transverse expansion of the prismatic specimens is 0.4 to 0.6%. This behavior is not observed in the specimens with stirrups, which demonstrates the effectiveness of three-dimensional restraints in significantly mitigating the risk of debonding, as well as DEF expansion.
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
钢筋沿黏结长度延迟形成钙矾石对膨胀的影响——第一部分:黏结对混凝土膨胀性能的作用
本文探讨了钢筋作为内约束对混凝土中延迟钙矾石形成(DEF)膨胀的影响。无端板钢筋埋设的混凝土试样经热处理后浸入水中。研究了马镫对膨胀的影响。结果表明:由于钢筋的应力约束程度不同,不加箍筋的试件纵向伸缩随纵向位置的不同而不同;没有马镫的试件的最终横向膨胀接近于无应力试件的测量值。相反,纵向和横向膨胀是显着减少了与马镫的标本。这表明纵向钢筋和马镫的组合产生三维约束应力,有助于限制DEF在纵向和横向上的膨胀。此外,当柱形试件的横向膨胀为0.4 ~ 0.6%时,不加箍箍的试件沿纵杆可能出现脱粘现象。在有马镫的试件中没有观察到这种行为,这表明三维约束在显著降低脱粘风险以及DEF扩展方面的有效性。
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 去求助
来源期刊
Journal of Advanced Concrete Technology
Journal of Advanced Concrete Technology 工程技术-材料科学:综合
CiteScore
3.70
自引率
10.00%
发文量
45
审稿时长
3.5 months
期刊介绍: JACT is fast. Only 5 to 7 months from submission to publishing thanks to electronic file exchange between you, the reviewers and the editors. JACT is high quality. Peer-reviewed by internationally renowned experts who return review comments to ensure the highest possible quality. JACT is transparent. The status of your manuscript from submission to publishing can be viewed on our website, greatly reducing the frustration of being kept in the dark, possibly for over a year in the case of some journals. JACT is cost-effective. Submission and subscription are free of charge . Full-text PDF files are available for the authors to open at their web sites. Scope: *Materials: -Material properties -Fresh concrete -Hardened concrete -High performance concrete -Development of new materials -Fiber reinforcement *Maintenance and Rehabilitation: -Durability and repair -Strengthening/Rehabilitation -LCC for concrete structures -Environmant conscious materials *Structures: -Design and construction of RC and PC Structures -Seismic design -Safety against environmental disasters -Failure mechanism and non-linear analysis/modeling -Composite and mixed structures *Other: -Monitoring -Aesthetics of concrete structures -Other concrete related topics
期刊最新文献
Multi–sensory Monitoring and Non–destructive Testing of New Materials for Concrete Engineered Barrier Systems Ion Evolution in Pore Solution of Alkali-activated Slag System and Its Effect on Passivation Behaviour of Steel Bars Carbonated Concrete Slurry Waste as Supplementary Cementitious Material Investigating the Influence of SCMs on Mechanical Performance through Experimental Feret's Coefficients in Low-carbon Concrete Structural Performance of RC Members Affected by Alkali–silica Reaction According to Crack Patterns
×
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
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 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 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1