腐蚀冻融耦合循环作用下碳纤维混凝土抗压强度性能试验研究  

Experimental Study on Compressive Strength of Carbon Fiber Reinforced Concrete Under Corrosion Freeze Thaw Coupling Cycle

作　　者：李涛峰[1] 张多新 LI Tao-feng;ZHANG Duo-xin(School of Civil Engineering and Transportation Engineering,Yellow River Conservancy Technical Institute,Kaifeng 475004,China;School of Civil Engineering and Communication,North China University of Water Resources and Electric Power,Zhengzhou 450045,China)

机构地区：[1]黄河水利职业技术学院土木与交通工程学院,河南开封475004 [2]华北水利水电大学土木与交通学院,河南郑州450045

出　　处：《水电能源科学》2022年第5期143-145,共3页Water Resources and Power

基　　金：河南省科技攻关计划(202102310258)。

摘　　要：为研究碳纤维对混凝土力学性能的影响,首先分析了不同碳纤维掺量(0%、0.2%、0.4%、0.6%、0.8%、1.0%)对混凝土抗压强度的改善规律;其次,分析在0.4 moL/L的NaCl溶液腐蚀环境下腐蚀时间对碳纤维混凝土力学性能的影响及在冻融循环作用下碳纤维对混凝土力学性能的影响;最后,基于两种试验构建了腐蚀冻融耦合循环试验,以此来分析碳纤维混凝土力学性能变化。试验结果表明,当碳纤维掺量为0.8%时,混凝土的力学性能提高最多;单一冻融循环对混凝土力学性能影响程度高于单一腐蚀环境对混凝土力学性能的影响程度;腐蚀和冻融环境对混凝土的破坏是相互的,即耦合环境下混凝土力学性能损伤要高于单一环境下混凝土力学性能损伤。In order to study the improvement of carbon fiber on the mechanical properties of concrete, the improvement law of different carbon fiber content(0%, 0.2%, 0.4%, 0.6%, 0.8% and 1.0%) on the compressive strength of concrete was analyzed. Secondly, the corrosive environment of 0.4 moL/L NaCl solution was prepared, and the influence of immersion time on the mechanical properties of carbon fiber reinforced concrete in corrosive environment was analyzed. At the same time, the mechanical properties degradation of carbon fiber reinforced concrete under freeze-thaw cycle was analyzed. The results show that when the content of carbon fiber is 0.8%, the mechanical properties of concrete are improved most;The influence of single freeze-thaw cycle on the mechanical properties of concrete is higher than that of single corrosive environment;Corrosion and freeze-thaw environment damage concrete is interactive, that is, the mechanical property damage of concrete in coupling environment is higher than that in single environment.

关 键 词：腐蚀环境 冻融循环 腐蚀冻融耦合循环 碳纤维掺量 抗压强度 

分 类 号：TV431[水利工程—水工结构工程]