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    High-Temperature Deterioration Mechanism of Textile-Reinforced Concrete with Different Cementitious Materials

    Source: Journal of Materials in Civil Engineering:;2021:;Volume ( 034 ):;issue: 001::page 04021388
    Author:
    Ping Xu
    ,
    Yuhao Cui
    ,
    Junfeng Dai
    ,
    Minxia Zhang
    ,
    Yahong Ding
    DOI: 10.1061/(ASCE)MT.1943-5533.0004027
    Publisher: ASCE
    Abstract: Textile-reinforced concrete (TRC), a new composite material commonly used for repair and reinforcement of engineered structural surfaces, is easily affected by high temperatures in the event of fire. Therefore, when investigating the fire resistance of this material, it is important to evaluate and improve its high-temperature mechanical properties. In this study, ordinary portland cement and high-alumina cement TRC were prepared, with various proportions of metakaolin used to replace the cement, to investigate the changes in the mechanical properties of TRC and its deterioration mechanism. The experimental results showed that metakaolin improved the mechanical properties of ordinary portland cement sheets at low temperatures, with optimum substitutions of 15% and 20% in ordinary portland cement and high-alumina cement, respectively. Moreover, basalt fiber woven mesh was shown to significantly improve the ductility and flexural properties of TRC sheets, and high-alumina cement-based TRC exhibited superior bending properties at 800°C with 216.4% ultimate improvement over ordinary portland cement. The results of microscopic analysis and X-ray diffraction (XRD) experiments revealed that the decrease in the high-temperature mechanical performance of the TRC sheets was caused by a combination of high-temperature damage to the matrix concrete, deterioration or oxidative deterioration of the fibers themselves, and damage to the bonding surface of both the concrete and the fibers. At high temperatures, the microstructure of the high-alumina cement TRC was tighter and bonded more effectively to the basalt fiber grid.
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      High-Temperature Deterioration Mechanism of Textile-Reinforced Concrete with Different Cementitious Materials

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4281895
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    contributor authorPing Xu
    contributor authorYuhao Cui
    contributor authorJunfeng Dai
    contributor authorMinxia Zhang
    contributor authorYahong Ding
    date accessioned2022-05-07T20:00:48Z
    date available2022-05-07T20:00:48Z
    date issued2021-10-23
    identifier other(ASCE)MT.1943-5533.0004027.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4281895
    description abstractTextile-reinforced concrete (TRC), a new composite material commonly used for repair and reinforcement of engineered structural surfaces, is easily affected by high temperatures in the event of fire. Therefore, when investigating the fire resistance of this material, it is important to evaluate and improve its high-temperature mechanical properties. In this study, ordinary portland cement and high-alumina cement TRC were prepared, with various proportions of metakaolin used to replace the cement, to investigate the changes in the mechanical properties of TRC and its deterioration mechanism. The experimental results showed that metakaolin improved the mechanical properties of ordinary portland cement sheets at low temperatures, with optimum substitutions of 15% and 20% in ordinary portland cement and high-alumina cement, respectively. Moreover, basalt fiber woven mesh was shown to significantly improve the ductility and flexural properties of TRC sheets, and high-alumina cement-based TRC exhibited superior bending properties at 800°C with 216.4% ultimate improvement over ordinary portland cement. The results of microscopic analysis and X-ray diffraction (XRD) experiments revealed that the decrease in the high-temperature mechanical performance of the TRC sheets was caused by a combination of high-temperature damage to the matrix concrete, deterioration or oxidative deterioration of the fibers themselves, and damage to the bonding surface of both the concrete and the fibers. At high temperatures, the microstructure of the high-alumina cement TRC was tighter and bonded more effectively to the basalt fiber grid.
    publisherASCE
    titleHigh-Temperature Deterioration Mechanism of Textile-Reinforced Concrete with Different Cementitious Materials
    typeJournal Paper
    journal volume34
    journal issue1
    journal titleJournal of Materials in Civil Engineering
    identifier doi10.1061/(ASCE)MT.1943-5533.0004027
    journal fristpage04021388
    journal lastpage04021388-13
    page13
    treeJournal of Materials in Civil Engineering:;2021:;Volume ( 034 ):;issue: 001
    contenttypeFulltext
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