[1]金立兵,余化龙,王振清,等.再生混凝土抗氯离子渗透的五相细观数值模拟[J].郑州大学学报(工学版),2022,43(01):83-89.[doi:10.13705/j.issn.1671-6833.2022.01.010]
　Jin Li Bing,Yu Hualong,Wang Zhenqing,et al.Five-phase mesoscopic numerical simulation of chloride permeation resistance in recycled aggregate concrete[J].Journal of Zhengzhou University (Engineering Science),2022,43(01):83-89.[doi:10.13705/j.issn.1671-6833.2022.01.010]
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再生混凝土抗氯离子渗透的五相细观数值模拟()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
43卷
期数:
2022年01期
页码:
83-89
栏目:
出版日期:
2022-01-09

文章信息/Info

Title:
Five-phase mesoscopic numerical simulation of chloride permeation resistance in recycled aggregate concrete
作者:
金立兵; 余化龙; 王振清; 薛鹏飞; 吴强
河南工业大学土木工程学院;河南工大设计研究院;

Author(s):
Jin Li Bing; Yu Hualong; Wang Zhenqing; Xue Pengfei; Wu Qiang;
School of Civil Engineering, Henan University of Technology; Institute of Design and Research Institute of Henan University of Technology;

关键词:
Keywords:
DOI:
10.13705/j.issn.1671-6833.2022.01.010
文献标志码:
A
摘要:
考虑到再生混凝土微细观结构的非均质性，建立了包括新、旧界面过渡区、新砂浆、旧粘结砂浆和天然骨料的再生混凝土五相模型。基于Monte-Carlo理论借助Matlab软件平台开发真实再生混凝土凸多边形粗骨料分析模型，研究了再生骨料混凝土特性因子对氯离子渗透的影响。试验结果与模型计算结果相近，证明五相凸骨料细观模型能较好的预测再生混凝土中氯离子的渗透行为。研究结果表明：在高掺量的再生粗骨料含量下，氯离子渗透行为包括扩散系数和扩散深度的增大，这取决于界面过渡区和旧粘结砂浆随再生粗骨料含量的增加而增大；新、旧界面过渡区和旧粘结砂浆是导致再生混凝土抗氯离子渗透能力弱的根本原因。
Abstract:
Considering the heterogeneity of micro-structure of recycled aggregate concrete (RAC), a five-phase model is established, which includes new, and old interface transition zone (ITZ), new mortar, old adherent mortar, and natural aggregate. ba＜x＞sed on the Monte-Carlo theory and MATLAB software platform, a real convex polygon coarse aggregate analysis model of RAC was developed, and the influence of the characteristics of recycled aggregate concrete on chloride ion penetration was studied. The experimental results are similar to the model calculation results, which prove that the five-phase convex aggregate model can better predict the chloride permeation behavior in RAC. The results show that: under the condition of high recycled coarse aggregate content, the chloride permeability behavior includes the increase of diffusivity and diffusion depth, which depends on the increase of ITZ and old bonding mortar with the increase of recycled coarse aggregate content. New and old ITZ and old adherent mortar are the main reasons for the weak resistance of RAC to chloride penetration

相似文献/References:

[1]郑元勋,杨培冰,康海贵.冻融环境下混凝土结构耐久性研究综述[J].郑州大学学报(工学版),2016,37(05):27.[doi:conctete structuredurabilityoverviewfreeze-thaw]
　Zheng Yuanxun,Yang Peibing,Kang Haigui.The Durability Overview of Concrete Structure under the Freeze-thaw Condition[J].Journal of Zhengzhou University (Engineering Science),2016,37(01):27.[doi:conctete structuredurabilityoverviewfreeze-thaw]
[2]李清富,刘晨光,张艳丽.混凝土碳化耐久性模糊分析[J].郑州大学学报(工学版),1996,17(03):7.
　Li Qingfu,Liu Chenguang,Zhang Yanli.Analysis of vague analysis of concrete carbonization durability[J].Journal of Zhengzhou University (Engineering Science),1996,17(01):7.
[3]李清富,李瑞锋,李平先.水工混凝土结构损伤的特点和原因浅析[J].郑州大学学报(工学版),1994,15(01):21.
　Li Qingfu,Li Ruifeng,Li Pingjiao.Analysis of the characteristics and reasons of water industry concrete structure damage[J].Journal of Zhengzhou University (Engineering Science),1994,15(01):21.

更新日期/Last Update: 2022-01-09