文献类型：期刊文献

英文题名：Damping properties of recycled concrete incorporated with emulsion-coated or carbonated recycled aggregates

作者：Liang, Chaofeng[1,2];Zhao, Qianqian[1];Du, Xiaomin[1];Chen, Hanlong[1];Ma, Zhiming[1];Gao, Yueqing[1];Liu, Tiejun[3]

机构：[1]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Peoples R China;[2]Shaoxing Univ, State Key Lab Intelligent Deep Met Min & Equipment, Shaoxing 312000, Peoples R China;[3]Harbin Inst Technol, Shenzhen Grad Sch, Shenzhen 518055, Peoples R China

年份：2025

卷号：494

外文期刊名：CONSTRUCTION AND BUILDING MATERIALS

收录：SCI-EXPANDED(收录号：WOS:001564953500015)、、EI(收录号：20253519080639)、Scopus(收录号：2-s2.0-105014484032)、WOS

基金：The authors would like to acknowledge the financial support from the National Science Fund for Distinguished Young Scholars (52025081) , National Natural Science Foundation (52479129) and the Natural Science Foundation of Zhejiang Province (LGF22E080035) .

语种：英文

外文关键词：Interface modification; Carbonation; Recycled aggregate concrete; Hysteretic energy dissipation; Damping mechanism

外文摘要：Interface modification methods such as emulsion coating and carbonation can effectively enhance the quality of recycled coarse aggregate (RCA), thereby improving the durability of recycled aggregate concrete (RAC). However, the effect of RCA interface modification on the damping performance of RAC is still unclear. Therefore, this paper investigates the effects of emulsion-coated or carbonated RCA on the damping properties of RAC through uniaxial compression cyclic loading tests. The damping mechanism of RAC influenced by RCA interface modification was revealed by ITZ microstructure analysis. Results indicated that the emulsion-coated RCA significantly enhanced the damping performance of RAC. Compared to unmodified RAC, the RAC prepared with carboxybutadiene emulsion-coated RCA exhibited increases of 219.4 % in hysteretic energy dissipation and 161.1 % in loss factor. In contrast, the carbonated RCA suppressed the damping performance of RAC, but improved its dynamic elastic modulus by 12.7 %. The constrained emulsion damping layer between the old mortar and new mortar, along with the loose interface structure between the emulsion and mortar, contributed to the enhanced energy dissipation. Carbonated RCA improved the interface microstructure and enhanced interfacial bonding, thereby reducing interfacial slippage and energy dissipation. These findings help inspire a novel structural vibration control strategy based on interface-modified RAC.