Bond Behavior between Recycled Concrete Containing CDW and Different Types of Steel Bars  

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作  者:Carine N.S.Reis Paulo Lima Mônica B.Leite 

机构地区:[1]Department of Technology,Post-graduation Program of Civil and Environmental Engineering,State University of Feira de Santana,Bahia,Brazil

出  处:《Journal of Architectural Environment & Structural Engineering Research》2021年第2期1-7,共7页建筑环境与结构工程研究(英文)

基  金:The authors would like to thank the CAPES which sponsored the first author.

摘  要:The operation of reinforced concrete structures is directly associated with the adhesion between the steel bar and the concrete,which allows the inter­nal forces to be transferred to the reinforcement during the process of load­ing the structural elements.The modification of the concrete composition,with the introduction of recycled aggregate from construction and demoli­tion waste(CDW),affects the steel-concrete interface and can modify the bonding stress,which is also influenced by the type and diameter of the bar used.In this work,the influence of the recycled fine aggregate(RFA)and types of steel bar on the steel-concrete bond was experimentally evaluated using the pullout test.Conventional concrete and recycled concrete,with RFA replacement level of 25%,were produced.Two types of steel rebars(i.e.,plain and deformed)with diameters of 10.0 and 16.0 mm were con­sidered in this paper.The results indicate a reduction in the adhesion stress with the introduction of recycled aggregate,but this trend is influenced by the diameter of the bar used.The use of ribbed bars modifies the stress bon-slip behavior,with an increase in the average bond strength,which is also observed with the reduction of the diameter of the bar.

关 键 词:Construction and demolition waste(CDW) Recycled concrete Steel-concrete bond behavior 

分 类 号:TG1[金属学及工艺—金属学]

 

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