摘要
为研究再生混凝土中氯离子的渗透机理,采用MATLAB建立双裂缝再生混凝土的细观模型,旨在揭示双裂缝对氯离子渗透的叠加效应,并分析裂缝伴随的相邻损伤区对渗透行为的影响。该模型涵盖新砂浆、老砂浆、新界面过渡区、老界面过渡区、原始骨料、双裂缝及损伤区等关键组成部分。通过系统分析双裂缝宽度、长度、损伤区尺寸、裂缝形状及裂缝间距等因素对氯离子渗透的影响,研究发现,双裂缝叠加效应对氯离子浓度有显著影响。当裂缝间距超过临界值时,双裂缝间的氯离子渗透将不再相互干扰。研究成果为深入理解再生混凝土中氯离子渗透机制提供了理论依据。
To study the mechanism of chloride ion permeation in recycled concrete,a mesoscale model of double-cracked recycled concrete was established using MATLAB,aiming to reveal the superposition effect of double cracks on chloride penetration and the impact of adjacent damage zones around the cracks on penetration behavior was investigated.The model included various components,such as new mortar,old mortar,new interfacial transition zone,old interfacial transition zone,original aggregate,double cracks,and damage zones.Through systematic analysis of factors such as the width and length of the double cracks,the dimensions of the damage zone size,crack shape,and crack spacing,it is found that the superposition effect of double cracks has a significant impact on chloride ion concentration.When the spacing between cracks exceeds the critical value,the chloride ion penetration between the two cracks will no longer interfere with each other.The research results provide a theoretical basis for a deeper understanding of the chloride ion permeation mechanism in recycled concrete.
作者
张海伟
吴晨洁
孙迎秋
韩静云
王德志
ZHANG Hai-wei;WU Chen-jie;SUN Ying-qiu;HAN Jing-yun;WANG De-zhi(School of Civil and Hydraulic Engineering,Ningxia University,Yinchuan 750021,China;Collage of Civil Engineering,North Minzu University,Yinchuan 750021,China;Engineering Technology Research Center of Water-Saving and Water Resource Regulation in Ningxia,Yinchuan 750021,China;Engineering Research Center for Efficient Utilization of Modern Agricultural Water Resources in Arid Regions,Ministry of Education,Yinchuan 750021,China;Engineering Technology Research Center of Earthquake Protection and Disaster Mitigation in Civil Engineering in Ningxia,Yinchuan 750021,China)
出处
《科学技术与工程》
北大核心
2026年第4期1625-1633,共9页
Science Technology and Engineering
基金
国家自然科学基金(52368037,51968060)
宁夏自然科学基金(2023AAC03040)
宁夏青年拔尖人才培养工程(2080116)
宁夏一流学科项目(NXYLXK2021A03)。
关键词
再生混凝土
双裂缝
损伤区
氯离子
细观分析
渗透影响
recycled concrete
double cracks
damage zones
chloride ion
mesoscale analysis
penetration effect
