氯盐干湿循环对再生混凝土力学性能研究进展  

Research progress of chloride wetting-drying cycle on mechanical properties of recycled concrete

作　　者：陈春红[1,2] 王磊 刘荣桂[2] 朱平华[1] 俞江[1] 伍金龙 CHEN Chunhong;WANG Leil;LIU Ronggui;ZHU Pinghua;YU Jiang;WU Jinlong(School of Urban Construction,Changzhou University,Changzhou 213164,China;Faculty of Civil Engineering and Mechanics,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]常州大学城市建设学院,江苏常州213164 [2]江苏大学土木工程与力学学院,江苏镇江212013

出　　处：《混凝土》2024年第5期1-8,共8页Concrete

基　　金：国家自然科学基金(52108190,51778272,51278073);江苏省研究生科研创新计划项目(KYCX22_3084)。

摘　　要：再生混凝土的应用,不仅能够解决废弃混凝土处理问题;又能降低因资源过度开采所引起的生态环境破坏,因而具有广阔的发展前景。相比于普通混凝土,干湿循环作用下再生混凝土的力学性能更为复杂。综述了氯盐干湿循环环境下再生混凝土力学性能研究进展,剖析了再生混凝土在氯盐侵蚀与干湿循环共同作用下抗压强度、劈裂抗拉强度、抗剪强度、动弹性模量、界面过渡区和孔隙结构等力学性能变化规律,分析了干湿循环与再生粗骨料对再生混凝土力学性能影响机理,总结了其力学性能改善措施。分析结果表明:既有研究存在不足,主要体现在试验早期不同研究者的研究结论离散性较大,需要进一步加强微观结构和破坏机理分析,完善理论体系。The use ofrecycled aggregate concrete(RAC)in civil engineering can solve related environmental problems and save natural resources.Compared with ordinary concrete,the mechanical properties of RAC under chloride wetting-drying cycle are more complex.It reviews the research progress of mechanical properties of RAC in chloride wetting-drying cycle environment,and analyzes the changes of mechanical properties of RAC under coupling effect of wetting-drying cycle and chloride erosion,such as compressive strength,splitting tensile strength,shear strength,dynamic elastic modulus,interphase transition zone and pore structure.The influence mechanism of wetting-drying cycle and recycled coarse aggregate on the mechanical properties of RAC is analyzed,and the measures to improve the mechanical properties are summarized.The analysis results show that there are shortcomings in the existing research,mainly reflected in the large dispersion of the research conclusions of different researchers in the early stage of the test.It is necessary to further strengthen the analysis of microstructure and failure mechanism to improve the theoretical system.

关 键 词：干湿循环 再生粗骨料 再生混凝土 力学性能 

分 类 号：TU528.01[建筑科学—建筑技术科学]