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Based on the chloride ion diffusion model and aggregate gradation theory, the mesoscopic model of recycled concrete random polygonal aggregate was constructed using PYTHON and COMSOL. The validity of the model was verified by the existing experimental results. The calculation and analysis of the chloride ion erosion resistance of recycled concrete under different working conditions such as the diffusivity of new and old mortar, the thickness of old mortar and the replacement ratio of recycled aggregate was carried out. And then the diffusion law of chloride ion in recycled concrete and the influence law of critical factors on the chloride ion erosion resistance were studied. The results show that the simulation results are close to the experimental values, and the method can better simulate the diffusion of chloride ions in recycled concrete. The relationship curve between chloride concentration and depth shows discontinuous characteristics. With the increase of diffusion coefficient of new and old mortar, the chloride ion content increases gradually. The chloride ion erosion resistance of recycled concrete decreases with the increase of the thickness of old mortar and the replacement ratio of recycled aggregate.

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基于氯离子扩散模型和骨料级配理论,采用PYTHON语言和COMSOL软件构建再生混凝土随机多边形骨料细观计算模型,并结合已有试验结果验证模型有效性,开展新老砂浆扩散系数、老砂浆厚度及再生骨料取代率等不同工况下再生混凝土抗氯离子侵蚀计算分析,研究氯离子在再生混凝土内部的扩散规律及各细观组分等关键因素对再生混凝土抗氯离子侵蚀的影响规律。结果表明,模拟结果与试验结果吻合较好,该方法能较好地模拟氯离子在再生混凝土内部的扩散过程;再生混凝土氯离子扩散浓度与深度的关系曲线呈现不连续性特征;随着新老砂浆扩散系数的增加,混凝土内氯离子浓度逐渐增大;再生混凝土抗氯离子侵蚀能力随老砂浆厚度、再生骨料取代率的增加而降低。

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姚泽良(1976-),女,博士(后)、副教授、硕导,研究方向为土木工程,E-mail:

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姚泽良(1976-),女,博士(后)、副教授、硕导,研究方向为土木工程,E-mail:

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姚泽良(1976-),女,博士(后)、副教授、硕导,研究方向为土木工程,E-mail:

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基于随机多边形骨料再生混凝土抗氯离子侵蚀研究
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姚泽良 a, b , 令狐恬晶 a, b , 祁亚伦 a, b , 党发宁 a, b , 崔婷婷 a, b
水电能源科学 | 水利水电工程 2023,41(4): 163-166
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水电能源科学 | 水利水电工程 2023, 41(4): 163-166
基于随机多边形骨料再生混凝土抗氯离子侵蚀研究
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姚泽良a, b , 令狐恬晶a, b, 祁亚伦a, b, 党发宁a, b, 崔婷婷a, b
作者信息
  • a.西安理工大学土木建筑工程学院,陕西 西安 710048
  • b.西安理工大学省部共建西北旱区生态水利国家重点实验室,陕西 西安 710048
  • 姚泽良(1976-),女,博士(后)、副教授、硕导,研究方向为土木工程,E-mail:

Research on Chloride Resistance of Recycled Concrete Based on Random Polygonal Aggregate
Ze-liang YAOa, b , Tian-jing LINGHUa, b, Ya-lun QIa, b, Fa-ning DANGa, b, Ting-ting CUIa, b
Affiliations
  • a.School of Civil Engineering and Architecture, Xi’an University of Technology, Xi’an 710048, China
  • b.State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
出版时间: 2023-04-25 doi: 10.20040/j.cnki.1000-7709.2023.20220668
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基于氯离子扩散模型和骨料级配理论,采用PYTHON语言和COMSOL软件构建再生混凝土随机多边形骨料细观计算模型,并结合已有试验结果验证模型有效性,开展新老砂浆扩散系数、老砂浆厚度及再生骨料取代率等不同工况下再生混凝土抗氯离子侵蚀计算分析,研究氯离子在再生混凝土内部的扩散规律及各细观组分等关键因素对再生混凝土抗氯离子侵蚀的影响规律。结果表明,模拟结果与试验结果吻合较好,该方法能较好地模拟氯离子在再生混凝土内部的扩散过程;再生混凝土氯离子扩散浓度与深度的关系曲线呈现不连续性特征;随着新老砂浆扩散系数的增加,混凝土内氯离子浓度逐渐增大;再生混凝土抗氯离子侵蚀能力随老砂浆厚度、再生骨料取代率的增加而降低。

再生混凝土  /  随机骨料  /  氯离子模型  /  扩散特性  /  数值模拟

Based on the chloride ion diffusion model and aggregate gradation theory, the mesoscopic model of recycled concrete random polygonal aggregate was constructed using PYTHON and COMSOL. The validity of the model was verified by the existing experimental results. The calculation and analysis of the chloride ion erosion resistance of recycled concrete under different working conditions such as the diffusivity of new and old mortar, the thickness of old mortar and the replacement ratio of recycled aggregate was carried out. And then the diffusion law of chloride ion in recycled concrete and the influence law of critical factors on the chloride ion erosion resistance were studied. The results show that the simulation results are close to the experimental values, and the method can better simulate the diffusion of chloride ions in recycled concrete. The relationship curve between chloride concentration and depth shows discontinuous characteristics. With the increase of diffusion coefficient of new and old mortar, the chloride ion content increases gradually. The chloride ion erosion resistance of recycled concrete decreases with the increase of the thickness of old mortar and the replacement ratio of recycled aggregate.

recycled aggregate concrete  /  random aggregate  /  chloride ion model  /  diffusion characteristics  /  numerical simulation
姚泽良, 令狐恬晶, 祁亚伦, 党发宁, 崔婷婷. 基于随机多边形骨料再生混凝土抗氯离子侵蚀研究. 水电能源科学, 2023 , 41 (4) : 163 -166 . DOI: 10.20040/j.cnki.1000-7709.2023.20220668
Ze-liang YAO, Tian-jing LINGHU, Ya-lun QI, Fa-ning DANG, Ting-ting CUI. Research on Chloride Resistance of Recycled Concrete Based on Random Polygonal Aggregate[J]. Water Resources and Power, 2023 , 41 (4) : 163 -166 . DOI: 10.20040/j.cnki.1000-7709.2023.20220668
  • 国家自然科学基金项目(51208422)
  • 陕西省教育厅资助项目(20JS092)
2023年第41卷第4期
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doi: 10.20040/j.cnki.1000-7709.2023.20220668
  • 接收时间:2022-04-06
  • 首发时间:2026-01-27
  • 出版时间:2023-04-25
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  • 收稿日期:2022-04-06
  • 修回日期:2022-07-04
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国家自然科学基金项目(51208422)
陕西省教育厅资助项目(20JS092)
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    a.西安理工大学土木建筑工程学院,陕西 西安 710048
    b.西安理工大学省部共建西北旱区生态水利国家重点实验室,陕西 西安 710048
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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