1 School of Civil and Hydraulic Engineering,Ningxia University,Yinchuan 750021,China
2 Collage of Civil Engineering,North Minzu University,Yinchuan 750021,China
3 Engineering Technology Research Center of Water-Saving and Water Resource Regulation in Ningxia,Yinchuan 750021,China
4 Engineering Research Center for Efficient Utilization of Modern Agricultural Water Resources in Arid Regions,Ministry of Education,Yinchuan 750021,China
5 Engineering Technology Research Center of Earthquake Protection and Disaster Mitigation in Civil Engineering in Ningxia,Yinchuan 750021,China
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.
ZHANG Hai-wei, WU Chen-jie, SUN Ying-qiu, HAN Jing-yun, WANG De-zhi.
Effect of Double Cracks on Chloride Penetration in Recycled Concrete[J].
Science Technology and Engineering, 2026, 26(4): 1625-1633 DOI:10.12404/j.issn.1671-1815.2501217
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