文献类型：期刊文献

英文题名：Enhancing energy dissipation in mortar utilizing recycled brick fine aggregate impregnated with polymer emulsion under uniaxial cyclic load

作者：Chen, Hanlong[1];Fu, Yangyan[1];Jin, Bin[2];Gao, Yueqing[1];Xu, Jinjun[3];Xuan, Meiyu[4];Liang, Chaofeng[1]

机构：[1]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Peoples R China;[2]Shaoxing Land & Space Planning Res Inst, Dept Hematol, Shaoxing 312000, Peoples R China;[3]Nanjing Tech Univ, Coll Civil Engn, Nanjing 211816, Peoples R China;[4]Jiaxing Univ, Coll Civil Engn & Architecture, Jiaxing 314001, Peoples R China

年份：2024

卷号：97

外文期刊名：JOURNAL OF BUILDING ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:001327068500001)、、EI(收录号：20243917108312)、Scopus(收录号：2-s2.0-85204780867)、WOS

基金：The authors sincerely acknowledge the financial support of this work by the Fund of the National Natural Science Foundation of China (Grant No. 52479129) , the Science and Technology Plan Project of Shaoxing City (2023B43003) , and the Natural Science Foundation of Zhejiang Province (LGF22E080035, LTGS24E080007) .

语种：英文

外文关键词：Polymer emulsion impregnation; Recycled brick aggregate; Cyclic compression loading; Hysteretic energy; Loss modulus

外文摘要：Optimizing the damping properties of materials can enhance the energy dissipation capacity of structures and mitigate the negative effects of dynamic loads on building components. This study investigated the effects of the polymer emulsion-impregnated recycled brick fine aggregate (PRBFA) replacement rate, emulsion-impregnation treatment method, and emulsion solid content on the dynamic damping properties of PRBFA-prepared mortar (PBM). Combined with microscopic tests, the enhanced damping mechanism of PBM was discussed. The results show that under the same stress amplitude, the equivalent damping ratio and loss modulus of PBM increase with the PRBFA replacement rate and emulsion solid content. The drying treatment of PRBFA demonstrates superior damping characteristics of PBM, with the equivalent damping ratio and loss modulus increased by 84.9%-129.4 % and 71.0%-117.2 %, respectively, compared to those of PBM with undried PRBFA. The damping enhancement of PBM is attributed to the weak interface between the aggregate and cement matrix, which facilitates slippage and friction. The damping layer formed between the high viscoelastic emulsion and the aggregate, or between the emulsion and the cement matrix, is conducive to energy dissipation. The optimal PRBFA replacement rate for balancing the mechanical and damping properties of PBM is between 38% and 60 %.