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    Modeling of Early-Age Creep of Shotcrete. I: Model and Model Parameters

    Source: Journal of Engineering Mechanics:;2000:;Volume ( 126 ):;issue: 003
    Author:
    Jérôme Sercombe
    ,
    Christian Hellmich
    ,
    Franz-Josef Ulm
    ,
    Herbert Mang
    DOI: 10.1061/(ASCE)0733-9399(2000)126:3(284)
    Publisher: American Society of Civil Engineers
    Abstract: In this paper, creep and viscous flow are revisited from the standpoint of constitutive modeling of thermo-chemo-mechanical couplings in early-age concrete. Within the framework of closed reactive porous media, creep is modeled by means of two mechanisms: a stress-induced water movement within the macropores and a relaxation mechanism in the micropores of cement gel, both of which lead to aging effects on creep and viscous flow of concrete. Regarding the first creep mechanism, aging results from chemomechanical couplings. Concerning the second mechanism, long-term aging is attributed to the relaxation of microprestresses in the micropores. Following the formulation of the model, it is shown how the material parameters can be identified from creep tests performed at different ages of loading. Finally, the model is applied to shotcrete, for which proper experimental data are missing.
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      Modeling of Early-Age Creep of Shotcrete. I: Model and Model Parameters

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    http://yetl.yabesh.ir/yetl1/handle/yetl/85161
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    contributor authorJérôme Sercombe
    contributor authorChristian Hellmich
    contributor authorFranz-Josef Ulm
    contributor authorHerbert Mang
    date accessioned2017-05-08T22:39:10Z
    date available2017-05-08T22:39:10Z
    date copyrightMarch 2000
    date issued2000
    identifier other%28asce%290733-9399%282000%29126%3A3%28284%29.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/85161
    description abstractIn this paper, creep and viscous flow are revisited from the standpoint of constitutive modeling of thermo-chemo-mechanical couplings in early-age concrete. Within the framework of closed reactive porous media, creep is modeled by means of two mechanisms: a stress-induced water movement within the macropores and a relaxation mechanism in the micropores of cement gel, both of which lead to aging effects on creep and viscous flow of concrete. Regarding the first creep mechanism, aging results from chemomechanical couplings. Concerning the second mechanism, long-term aging is attributed to the relaxation of microprestresses in the micropores. Following the formulation of the model, it is shown how the material parameters can be identified from creep tests performed at different ages of loading. Finally, the model is applied to shotcrete, for which proper experimental data are missing.
    publisherAmerican Society of Civil Engineers
    titleModeling of Early-Age Creep of Shotcrete. I: Model and Model Parameters
    typeJournal Paper
    journal volume126
    journal issue3
    journal titleJournal of Engineering Mechanics
    identifier doi10.1061/(ASCE)0733-9399(2000)126:3(284)
    treeJournal of Engineering Mechanics:;2000:;Volume ( 126 ):;issue: 003
    contenttypeFulltext
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