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    Simulation Study on Diffusion of Chlorides in Concretes with Load-Induced Heterogeneous Stress

    Source: Journal of Materials in Civil Engineering:;2024:;Volume ( 036 ):;issue: 005::page 04024052-1
    Author:
    Yaocheng Wang
    ,
    Zhixin Zhang
    ,
    Wengen Yang
    ,
    Xu Li
    ,
    Wei Liu
    ,
    Weiwen Li
    ,
    Wujian Long
    ,
    Baojian Zhan
    ,
    Xiaobo Ding
    ,
    Feng Xing
    DOI: 10.1061/JMCEE7.MTENG-14678
    Publisher: ASCE
    Abstract: Ingress of chlorides (Cl−) in concretes is influenced by external applied loads, and it is difficult to conduct a quantitative conclusion via experiments due to the geometry of concrete components and their different mechanical and chemical properties. To assist in-depth understanding on Cl− ingress in loaded concretes, a numerical model considering different mechanical and transport properties of three concrete components (paste, aggregate, and interfacial transition zone), heterogeneously distributed stress generated by axial loads and the consequent change in Cl− diffusion property at micro level, is established with COMSOL. Its accuracy and functionality have been verified with lab-based results from compressed and tensile samples at a macro level. The obtained results suggested that the model can effectively reveal stress distribution, generation, and propagation of cracks and Cl− diffusion in loaded concretes. Based on this model, it can be deduced that without considering the heterogeneous mechanical and transport properties of concrete components, the extent of Cl− ingress in concretes could be quite close when the induced stress is lower than 40% of the ultimate damaging stress; in comparison, it would be underestimated once the compressive or tensile loads exceed 60% of the ultimate damaging stress. Under 60% compressive loads, the Cl− ingress depth is decreased by 66%, while that is increased by roughly 40% for a 60% tensile loads.
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      Simulation Study on Diffusion of Chlorides in Concretes with Load-Induced Heterogeneous Stress

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4297783
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    contributor authorYaocheng Wang
    contributor authorZhixin Zhang
    contributor authorWengen Yang
    contributor authorXu Li
    contributor authorWei Liu
    contributor authorWeiwen Li
    contributor authorWujian Long
    contributor authorBaojian Zhan
    contributor authorXiaobo Ding
    contributor authorFeng Xing
    date accessioned2024-04-27T22:54:03Z
    date available2024-04-27T22:54:03Z
    date issued2024/05/01
    identifier other10.1061-JMCEE7.MTENG-14678.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4297783
    description abstractIngress of chlorides (Cl−) in concretes is influenced by external applied loads, and it is difficult to conduct a quantitative conclusion via experiments due to the geometry of concrete components and their different mechanical and chemical properties. To assist in-depth understanding on Cl− ingress in loaded concretes, a numerical model considering different mechanical and transport properties of three concrete components (paste, aggregate, and interfacial transition zone), heterogeneously distributed stress generated by axial loads and the consequent change in Cl− diffusion property at micro level, is established with COMSOL. Its accuracy and functionality have been verified with lab-based results from compressed and tensile samples at a macro level. The obtained results suggested that the model can effectively reveal stress distribution, generation, and propagation of cracks and Cl− diffusion in loaded concretes. Based on this model, it can be deduced that without considering the heterogeneous mechanical and transport properties of concrete components, the extent of Cl− ingress in concretes could be quite close when the induced stress is lower than 40% of the ultimate damaging stress; in comparison, it would be underestimated once the compressive or tensile loads exceed 60% of the ultimate damaging stress. Under 60% compressive loads, the Cl− ingress depth is decreased by 66%, while that is increased by roughly 40% for a 60% tensile loads.
    publisherASCE
    titleSimulation Study on Diffusion of Chlorides in Concretes with Load-Induced Heterogeneous Stress
    typeJournal Article
    journal volume36
    journal issue5
    journal titleJournal of Materials in Civil Engineering
    identifier doi10.1061/JMCEE7.MTENG-14678
    journal fristpage04024052-1
    journal lastpage04024052-11
    page11
    treeJournal of Materials in Civil Engineering:;2024:;Volume ( 036 ):;issue: 005
    contenttypeFulltext
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