基于微细观技术的透水混凝土破坏形态研究  

Damage Patterns of Pervious Concrete Based on Microscopic Technology

作　　者：吴伟 施晓东 高晓鹏 单景松 贺金乐 WU Wei;SHI Xiaodong;GAO Xiaopeng;SHAN Jingsong;HE Jinle(Shandong Highway and Bridge Construction Group Co.,Ltd.,Jinan 250000,China;College of Civil Engineering and Architectures,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]山东省公路桥梁建设集团有限公司,济南250000 [2]山东科技大学土木工程与建筑学院,山东青岛266590

出　　处：《鲁东大学学报(自然科学版)》2025年第1期89-96,共8页Journal of Ludong University:Natural Science Edition

基　　金：山东省自然科学基金(ZR2021ME004);住房和城乡建设部科技项目(2020-K-063)。

摘　　要：为揭示透水混凝土受载条件下开裂过程和破坏状态,需要对其内部变形、裂纹产生和扩展规律进行研究。本试验通过数字图像相关(DIC)方法结合Ncorr程序和电镜扫描,对透水混凝土试件进行了单轴加载试验,并深入分析了其破坏形态和机理。结果显示:试件在单轴受压过程中,裂纹由微裂纹逐渐增多直到贯穿破坏,产生了脆性和延性两种不同的破坏现象;裂纹类型与配合比密切相关,接近最优配合比的试验组裂纹分布均匀,主要集中在界面过渡区和水泥浆体位置,而其他试验组则出现了较多的裂纹和骨料破坏;此外,破坏后的裂纹多集中在空隙、骨料与水泥浆体界面结合处,呈现出扩展后的主裂纹形态。In order to reveal the cracking process and distress state of pervious concrete under load,it is necessary to study its internal deformation process,crack generation and propagation.In this experiment,the uniaxial loading test of pervious concrete specimens was carried out by digital image correlation(DIC)method,Ncorr program and electron microscope scanning,and the distress mode and mechanism were deeply analyzed.The results are as follows.In the uniaxial compression process,the cracks gradually increase from micro-cracks to penetration distress,resulting in two different distress phenomena:brittleness and ductility.The crack type is closely related to the mix ratio.The crack distribution of the test group close to the optimal mix ratio is uniform,mainly concentrated in the interfacial transition zone and cement body,while the other test groups have more cracks and aggregate damage.In addition,the cracks after distress are mostly concentrated in the interstice and the interface of aggregate and cement slurry,showing the expanded main crack morphology.

关 键 词：透水混凝土 DIC 细观结构 CT扫描 

分 类 号：U414[交通运输工程—道路与铁道工程]