{"title":"Load-bearing capacity of precast high-strength self-compacting recycled aggregate concrete column-to-column connections","authors":"Xiaoguang Chen, Zeger Sierens, Jiabin Li","doi":"10.1680/jmacr.23.00109","DOIUrl":null,"url":null,"abstract":"Recycled aggregate concrete (RAC) often shows different strength and deformation properties to natural aggregate concrete (NAC) and may therefore have an impact on the connections between precast concrete elements. In this work, three simple connections between precast concrete columns were considered, including a wet connection with bedding mortar, a dry connection without bedding mortar and a monolithic joint with plain concrete. An industrially produced coarse recycled concrete aggregate (RCA) was used to replace partially or fully a coarse natural aggregate in the concrete. A total of twenty-two 200 mm × 200 mm × 500 mm reinforced concrete columns were prepared and tested under axial monotonic loading through displacement control. The results showed that regardless of RCA content, the equation specified in ACI 318 (2019) and the one proposed by Vambersky (1990) provided safe estimates of the load-bearing capacity of wet connections between reinforced RAC columns.","PeriodicalId":18113,"journal":{"name":"Magazine of Concrete Research","volume":null,"pages":null},"PeriodicalIF":1.8000,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Magazine of Concrete Research","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1680/jmacr.23.00109","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: 0
Abstract
Recycled aggregate concrete (RAC) often shows different strength and deformation properties to natural aggregate concrete (NAC) and may therefore have an impact on the connections between precast concrete elements. In this work, three simple connections between precast concrete columns were considered, including a wet connection with bedding mortar, a dry connection without bedding mortar and a monolithic joint with plain concrete. An industrially produced coarse recycled concrete aggregate (RCA) was used to replace partially or fully a coarse natural aggregate in the concrete. A total of twenty-two 200 mm × 200 mm × 500 mm reinforced concrete columns were prepared and tested under axial monotonic loading through displacement control. The results showed that regardless of RCA content, the equation specified in ACI 318 (2019) and the one proposed by Vambersky (1990) provided safe estimates of the load-bearing capacity of wet connections between reinforced RAC columns.
再生骨料混凝土(RAC)往往表现出与天然骨料混凝土(NAC)不同的强度和变形特性,因此可能对预制混凝土构件之间的连接产生影响。在这项工作中,考虑了预制混凝土柱之间的三种简单连接,包括带衬垫砂浆的湿连接,不带衬垫砂浆的干连接以及与素混凝土的整体连接。采用工业生产的粗再生混凝土骨料(RCA)部分或全部替代混凝土中的粗天然骨料。通过位移控制,制备了22根200 mm × 200 mm × 500 mm钢筋混凝土柱,并进行了轴向单调加载试验。结果表明,无论RCA含量如何,ACI 318(2019)中规定的方程和Vambersky(1990)提出的方程都提供了钢筋RAC柱间湿连接承载能力的安全估计。
期刊介绍:
For concrete and other cementitious derivatives to be developed further, we need to understand the use of alternative hydraulically active materials used in combination with plain Portland Cement, sustainability and durability issues. Both fundamental and best practice issues need to be addressed.
Magazine of Concrete Research covers every aspect of concrete manufacture and behaviour from performance and evaluation of constituent materials to mix design, testing, durability, structural analysis and composite construction.