第55卷第4期
2023
年8月
DOI:10.15986/j.1006-7930.2023.04.013
西安建筑科技大学学报（自然科学版）
J. Xi'an Univ. of Arch. & Tech. (Natural Science Edition)
Vol.55No. 4
Aug.2023
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
朱红兵1.2.3，郭正发"，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）
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.
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
中图分类号：
TU37
；U445.7+2
Experimental study on shear resistance properties of epoxy resin interface of
ordinary concrete members-lightweight ceramsite concrete after freeze-thaw
(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)
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 freze-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. Af
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（论文）.pdf
