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    Bond-Slip Behavior of Corroded Rebar Embedded in Ultrahigh Toughness Cementitious Composite

    Source: Journal of Materials in Civil Engineering:;2018:;Volume ( 030 ):;issue: 007
    Author:
    Hou Lijun;Guo Shang;Zhou Bingxuan;Xu Shilang;Chen Da
    DOI: 10.1061/(ASCE)MT.1943-5533.0002324
    Publisher: American Society of Civil Engineers
    Abstract: Corroded reinforced concrete (RC) members are repaired using ultrahigh toughness cementitious composite (UHTCC), and the bonding between corroded rebar and UHTCC has a significant effect on the mechanical properties of repaired members. In the present paper, the bond behaviors of UHTCC and corroded reinforcement obtained in a concrete environment were investigated via central pullout tests. Parameters including the corrosion ratio and the ratio of the cover thickness to the rebar diameter (c/d) were varied. The experimental results revealed that, compared with concrete specimens, UHTCC specimens exhibited a higher nominalized bond strength and full bond-slip response with a slip plateau near the peak bond stress. The dependence of the bond strength on the corrosion ratio was correlated with c/d. Furthermore, at the considered corrosion levels, the residual bond strength and the bond toughness of the corroded rebar were higher than that of the noncorroded rebar. A bond-slip constitutive model derived from the existing models was proposed, and the predicted curves provided a reasonable description of the bond characteristics.
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      Bond-Slip Behavior of Corroded Rebar Embedded in Ultrahigh Toughness Cementitious Composite

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4249239
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    contributor authorHou Lijun;Guo Shang;Zhou Bingxuan;Xu Shilang;Chen Da
    date accessioned2019-02-26T07:46:11Z
    date available2019-02-26T07:46:11Z
    date issued2018
    identifier other%28ASCE%29MT.1943-5533.0002324.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4249239
    description abstractCorroded reinforced concrete (RC) members are repaired using ultrahigh toughness cementitious composite (UHTCC), and the bonding between corroded rebar and UHTCC has a significant effect on the mechanical properties of repaired members. In the present paper, the bond behaviors of UHTCC and corroded reinforcement obtained in a concrete environment were investigated via central pullout tests. Parameters including the corrosion ratio and the ratio of the cover thickness to the rebar diameter (c/d) were varied. The experimental results revealed that, compared with concrete specimens, UHTCC specimens exhibited a higher nominalized bond strength and full bond-slip response with a slip plateau near the peak bond stress. The dependence of the bond strength on the corrosion ratio was correlated with c/d. Furthermore, at the considered corrosion levels, the residual bond strength and the bond toughness of the corroded rebar were higher than that of the noncorroded rebar. A bond-slip constitutive model derived from the existing models was proposed, and the predicted curves provided a reasonable description of the bond characteristics.
    publisherAmerican Society of Civil Engineers
    titleBond-Slip Behavior of Corroded Rebar Embedded in Ultrahigh Toughness Cementitious Composite
    typeJournal Paper
    journal volume30
    journal issue7
    journal titleJournal of Materials in Civil Engineering
    identifier doi10.1061/(ASCE)MT.1943-5533.0002324
    page4018132
    treeJournal of Materials in Civil Engineering:;2018:;Volume ( 030 ):;issue: 007
    contenttypeFulltext
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