[1]朱红兵,郭正发,韩 蓓,等.陶粒混凝土-普通混凝土环氧树脂界面冻融后抗剪性能试验研究[J].西安建筑科技大学学报(自然科学版),2023,55(04):578-584.[doi:10.15986/j.1006-7930.2023.04.013 ]
　ZHU Hongbing,GUO Zhengfa,HAN Bei,et al.Experimental study on shear resistance properties of epoxy resin interface of ordinary concrete members-lightweight ceramsite concrete after freeze-thaw[J].J. Xi'an Univ. of Arch. & Tech.(Natural Science Edition),2023,55(04):578-584.[doi:10.15986/j.1006-7930.2023.04.013 ]
点击复制

陶粒混凝土-普通混凝土环氧树脂界面冻融后抗剪性能试验研究()
分享到：

西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
55
期数:
2023年04期
页码:
578-584
栏目:
出版日期:
2023-10-26

文章信息/Info

Title:
Experimental study on shear resistance properties of epoxy resin interface of ordinary concrete members-lightweight ceramsite concrete after freeze-thaw
文章编号:
1006-7930(2023)04-0578-07
作者:
朱红兵1; 2; 3; 郭正发1; 韩 蓓1; 段亦雪1
(1.武汉科技大学 城市建设学院，湖北 武汉 4300065; 2.城市更新湖北省工程研究中心，湖北 武汉 430065; 3.武汉科技大学 高性能工程结构研究院，湖北 武汉 430065)
Author(s):
ZHU Hongbing1; 2; 3;  GUO Zhengfa1;  HAN Bei1;  DUAN Yixue1
(1.School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China; 2.Hubei Provincial Engineering Research Center of Urban Regeneration,Wuhan 430065, China; 3.Institute of High Performance Engineering Structure, Wuhan University of Science and Technology, Wuhan 430065, China)
关键词:
全轻陶粒混凝土;  混凝土结构加固;  冻融;  环氧树脂界面;  抗剪性能;  试验;  计算公式
Keywords:
lightweight ceramsite concrete;  concrete structure reinforcement;  freezing and thawing;  epoxy resin interface;  shear resistance;  experiment;  calculation formula
分类号:
TU37; U445.7+2
DOI:
10.15986/j.1006-7930.2023.04.013
文献标志码:
A
摘要:
采用全轻陶粒混凝土加固普通混凝土构件,可在实现既有结构性能提升的同时降低加固体自重,改善加固结构承载特性.为研究新老混凝土环氧树脂粘结界面冻融损伤后抗剪性能退化规律,开展了7组新老混凝土试件和2组整浇试件的冻融试验,测试各组试件分别在经历0、5、10、15、20、25及30次冻融后的界面抗剪强度,分析试件外观损伤、抗剪破坏形态及抗剪强度退化规律.研究结果表明:冻融次数低于15时试件剪切破坏均发生在普通混凝土与环氧树脂界面剂之间,冻融次数超过25时发生在全轻陶粒混凝土与环氧树脂界面剂之间,15～25次时为过渡状态; 冻融后试件界面抗剪强度出现明显退化,经历5、10、15、20、25、30次冻融循环后,界面抗剪强度较冻融前的下降率分别为7.83%、20.91%、25.54%、31.11%、36.54%、45.27%.建立了环氧树脂界面的抗剪强度退化计算公式,可较准确地预测出冻融后环氧树脂界面抗剪强度.研究结论可为工程结构加固及类似新老混凝土连接界面研究与设计提供参考.
Abstract:
Using lightweight ceramsite concrete to strengthen ordinary concrete members can improve the performance of existing structures, reduce the dead weight of added solids, and improve the bearing characteristics of strengthened structures. In order to study the degradation law of shear performance of epoxy resin bonding interface of new and old concrete after freeze-thaw damage, the freeze-thaw tests of 7 groups of new and old concrete specimens and 2 groups of cast-in-place specimens were carried out. The interfacial shear strength of each group of strengthened specimens after 0, 5, 10, 15, 20, 25 and 30 freeze-thaw cycles was tested, and the appearance damage, shear failure morphology and degradation law of shear strength of specimens were analyzed. The results show that when the freeze-thaw times are less than 15, the shear failure occurs between ordinary concrete and epoxy resin interface agent, and when the freeze-thaw times are more than 25, the shear failure occurs between all lightweight ceramsite concrete and epoxy resin interface agent, and it is in a transitional state when the freeze-thaw times are 15-25. After freezing and thawing, the shear strength of the interface of the specimen shows significant degradation. After 5, 10, 15, 20, 25, and 30 freezing and thawing cycles, the shear strength of the interface decreases by 7.83%, 20.91%, 25.54%, 31.11%, 36.54%, and 45.27%, respectively, compared with that before freezing and thawing. The shear strength degradation formula of epoxy resin interface is established, which can accurately predict the shear strength of epoxy resin interface after freezing and thawing. The research conclusions can provide reference for the research and design of engineering structure reinforcement and similar new and old concrete connection interface.

参考文献/References:

[1]中华人民共和国住房和城乡建设部. 混凝土结构加固设计规范: GB50367—2013[S]. 北京: 中国建筑工业出版社, 2013.
Housing and Urban-Rural Development of P.R. China. Code for design of strengthening of concrete structure: GB50367—2013[S]. Beijing: China Building Industry Press, 2013.
[2]邓明科, 李彤, 樊鑫淼. 高延性混凝土加固砖柱轴压性能试验研究[J]. 工程力学,2019,36(5):92-99.
DENG Mingke, LI Tong, FAN Xinmiao. Experimental investigation on axial compression of brick columns strengthened with HDC[J]. Engineering Mechanics, 2019, 36(5): 92-99.
[3]陈建国, 吴光军, 孙桂山, 等. 硅灰和聚丙烯纤维净浆界面剂对新老混凝土粘结力学性能的影响研究[J]. 新型建筑材料, 2018, 45(4): 52-55.
CHEN Jianguo,WU Guangjun,SUN Guishan,et al. Effect study of silica fume and polymer fiber interface agent on bond mechanics behavior of new and old concrete[J]. New Building Materials, 2018, 45(4): 52-55.
[4]刘博研, 薛伟辰, 孙哲. 界面构造对预制混凝土柱接缝抗剪性能的影响研究[J].西安建筑科技大学学报(自然科学版), 2022,54(2):164-173.
LIU Boyan, XUE Weichen, SUN Zhe. Influence of interface structures on shear performance of precast concrete column joints[J].J.Xi'an Univ.of Arch.& Tech.(Natural Science Edition),2022,54(2):164-173.
[5]乔连朋, 袁群, 冯凌云. 新型界面剂作用下新老混凝土黏结的耐久性能[J]. 公路, 2020, 65(7):33-37.
QIAO Lianpeng, YUAN Qun, FENG Lingyun. Durability of new and old concrete bonding under the action of new-type Interface agent[J]. Highway, 2020, 65(7): 33-37.
[6]朱红兵, 张娜, 余志武, 等. 钢-聚丙烯混杂纤维陶粒混凝土与螺纹钢筋的黏结力学特性[J].工业建筑, 2022, 52(2): 32-36,114.
ZHU Hongbing, ZHANG Na, YU Zhiwu, et al. Bonding mechanical properties between ceramsite concrete with hybrid fibers of steel and polypropylene and threaded rebars[J].IndustrialConstruction,2022,52(2): 32-36,114.
[7]张菊辉, 李粤. 新老混凝土结合面黏结强度影响因素研究综述[J]. 混凝土, 2017(10): 156-159,162.
ZHANG Juhui, LI Yue. Research summary on factors about influencing strength of interface between new and old concrete[J]. Concrete, 2017(10): 156-159,162.
[8]冯侠, 乔连朋, 袁群, 等. 新混凝土与碳化混凝土黏结抗冻性能研究[J]. 施工技术, 2014, 43(2): 108-110.
FENG Xia, QIAO Lianpeng, YUAN Qun, et al. The study on antifreeze property of agglutinating new concrete and carbonized concrete[J]. Construction Technology, 2014, 43(2): 108-110.
[9]ZHU H, FAN J, YI C, et al. Characterization of freeze-thaw resistance of new-to-old concrete based on the ultrasonic pulse velocity method[J]. Journal of Testing and Evaluation, 2021, 49(1): 20190639.
[10]乔连朋, 袁群, 张国岑, 等. 新老混凝土黏结力学性能的时间效应研究[J]. 人民黄河, 2017, 39(4): 111-114.
QIAO Lianpeng, YUAN Qun, ZHANG Guocen, et al. Time effect on mechanical properties of agglutinating new concrete and old concrete[J]. Yellow River, 2017, 39(4): 111-114.
[11]ZHANG X, ZHANG S, LUO Y, et al. Effects of interface orientations on bond strength between old conventional concrete and new self-consolidating concrete[J]. ACI Structural Journal, 2020, 117(5):191-202.
[12]黄伟, 方张平. 冻融条件下新老混凝土粘结后抗折性能[J]. 材料科学与工程学报, 2021, 39(5):745-749,767.
HUANG Wei, FANG Zhangping. Adhesive bending properties of new-old concrete under freeze-thaw conditions[J]. Journal of Materials Science & Engineering, 2021, 39(5):745-749,767.
[13]FAN J, WU L, ZHANG B. Influence of old concrete age, interface roughness and freeze-thawing attack on new-to-old concrete structure[J]. Materials, 2021, 14(5): 1057.
[14]HU Bo, MENG TengFei, LI Yuan, et al. Dynamic splitting tensile bond behavior of new-to-old concrete interfaces[J]. Construction & Building Materials, 2021, 281:122570.
[15]李秀, 徐文康, 朱红兵, 等. 清水及氯盐环境下陶粒混凝土冻融损伤规律试验研究[J]. 混凝土与水泥制品, 2020(4): 29-32.
LI Xiu, XU Wenkang, ZHU Hongbing, et al. Experimental study on the damage rule of ceramsite concrete under the environment of clear water or chloride solution[J]. China Concrete and Cement Products, 2020(4): 29-32.
[16]李嘉, 董亮, 张坚, 等. UHPC-沥青薄面层环氧界面剂黏结性能试验[J]. 长安大学学报(自然科学版), 2020, 40(1): 49-57.
LI Jia, DONG Liang, ZHANG Jian, et al. Experimental on bonding performances of UHPC-thin asphalt layer with epoxy adhesive agents for ultra-high performance composite bridge deck[J]. Journal of Chang'an University(Natural Science Edition), 2020, 40(1): 49-57.
[17]谢剑, 陈玉洁, 孙雅丹. UHPC与普通混凝土试件界面黏结抗冻性能试验研究[J].硅酸盐通报, 2021, 40(12): 3945-3955.
XIE Jian, CHEN Yujie, SUN Yadan. Experimental study on interfacial antifreeze performance of UHPC and normal concrete[J]. Bulletin of the Chinese Ceramic Society, 2021, 40(12): 3945-3955.
[18]李妍, 贺柱国. 冻融环境下废旧纤维混凝土与旧混凝土粘结面劈拉试验[J]. 吉林建筑大学学报, 2020,37(2): 19-22,42.
LI Yan, HE Zhuguo. Split tensile test of the bonding surface between waste fiber reinforced concrete and old concrete under freeze thaw environment[J]. Journal of Jilin Jianzhu University, 2020,37(2): 19-22, 42.
[19]叶果. 新老混凝土界面抗剪性能研究[D]. 重庆:重庆大学, 2011.
YE Guo. Study on the anti-shear behavior of bond-interface between new and old concrete[D]. Chongqing: Chongqing University, 2011.

备注/Memo

备注/Memo:
收稿日期:2022-11-11修回日期:2023-07-16
基金项目:国家自然科学基金项目(52178182); 湖北省高等学校优秀中青年科技创新团队计划基金项目(T2022002); 武汉科技大学湖北省“十四五”优势特色学科(群)基金项目(2023D0501)
第一作者:朱红兵(1977—)，男，博士，教授，博士生导师，主要研究方向为混凝土结构耐久性.E-mail:zhuhongbing@wust.edu.cn
更新日期/Last Update: 2023-08-28