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    Thermal Properties of Hybrid Fiber-Reinforced Reactive Powder Concrete at High Temperature

    Source: Journal of Materials in Civil Engineering:;2020:;Volume ( 032 ):;issue: 003
    Author:
    Haiyan Li
    ,
    Xianhui Hao
    ,
    Qi Qiao
    ,
    Boyang Zhang
    ,
    Hua Li
    DOI: 10.1061/(ASCE)MT.1943-5533.0003053
    Publisher: ASCE
    Abstract: In order to study the thermal properties of reactive powder concrete (RPC) at high temperatures, the thermal conductivity, thermal diffusivity, specific heat capacity, and linear expansion coefficient of hybrid fiber-reinforced RPC at 20°C–900°C are measured. The formulas of thermal parameters with the volume fraction of polypropylene fiber and the elevated temperatures are fitted and compared with the ordinary concrete (OC) and high-strength concrete (HSC). The results indicate that as the temperature increases, the thermal conductivity and thermal diffusivity first descend and then rise, while the linear expansion coefficient and specific heat capacity first increase and then decrease. The thermal conductivity and specific heat capacity of RPC are lower than that of OC and HSC, and the thermal diffusivity coefficient of RPC is lower than that of HSC and higher than that of OC. Through inputting the measured thermal parameters to the finite-element software, the simulated temperature–time curves of hybrid fiber-reinforced RPC are obtained and compared with the measured curves. It is found that the two curves are basically consistent, and thus the measured thermal parameters are accurate and reliable, and can be used in the numerical simulation analysis of RPC structures under fire.
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      Thermal Properties of Hybrid Fiber-Reinforced Reactive Powder Concrete at High Temperature

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4266572
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    contributor authorHaiyan Li
    contributor authorXianhui Hao
    contributor authorQi Qiao
    contributor authorBoyang Zhang
    contributor authorHua Li
    date accessioned2022-01-30T20:08:09Z
    date available2022-01-30T20:08:09Z
    date issued2020
    identifier other%28ASCE%29MT.1943-5533.0003053.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4266572
    description abstractIn order to study the thermal properties of reactive powder concrete (RPC) at high temperatures, the thermal conductivity, thermal diffusivity, specific heat capacity, and linear expansion coefficient of hybrid fiber-reinforced RPC at 20°C–900°C are measured. The formulas of thermal parameters with the volume fraction of polypropylene fiber and the elevated temperatures are fitted and compared with the ordinary concrete (OC) and high-strength concrete (HSC). The results indicate that as the temperature increases, the thermal conductivity and thermal diffusivity first descend and then rise, while the linear expansion coefficient and specific heat capacity first increase and then decrease. The thermal conductivity and specific heat capacity of RPC are lower than that of OC and HSC, and the thermal diffusivity coefficient of RPC is lower than that of HSC and higher than that of OC. Through inputting the measured thermal parameters to the finite-element software, the simulated temperature–time curves of hybrid fiber-reinforced RPC are obtained and compared with the measured curves. It is found that the two curves are basically consistent, and thus the measured thermal parameters are accurate and reliable, and can be used in the numerical simulation analysis of RPC structures under fire.
    publisherASCE
    titleThermal Properties of Hybrid Fiber-Reinforced Reactive Powder Concrete at High Temperature
    typeJournal Paper
    journal volume32
    journal issue3
    journal titleJournal of Materials in Civil Engineering
    identifier doi10.1061/(ASCE)MT.1943-5533.0003053
    page04020022
    treeJournal of Materials in Civil Engineering:;2020:;Volume ( 032 ):;issue: 003
    contenttypeFulltext
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