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回收碳纤维对混凝土电热性能的影响

王艳 李文俊 李奥阳 孙琳琳 郭冰冰

王艳, 李文俊, 李奥阳, 等. 回收碳纤维对混凝土电热性能的影响[J]. 复合材料学报, 2024, 42(0): 1-10.
引用本文: 王艳, 李文俊, 李奥阳, 等. 回收碳纤维对混凝土电热性能的影响[J]. 复合材料学报, 2024, 42(0): 1-10.
WANG Yan, LI Wenjun, LI Aoyang, et al. Effect of recycled carbon fiber on the electrothermal properties of concrete[J]. Acta Materiae Compositae Sinica.
Citation: WANG Yan, LI Wenjun, LI Aoyang, et al. Effect of recycled carbon fiber on the electrothermal properties of concrete[J]. Acta Materiae Compositae Sinica.

回收碳纤维对混凝土电热性能的影响

基金项目: 国家自然科学基金 (52078414);陕西省自然科学基金(2020JM-469)
详细信息
    通讯作者:

    王艳,博士,教授,博士生导师,研究方向为混凝土结构耐久性、智能材料及结构系统 E-mail:wangyanwjx@126.com

  • 中图分类号: TU528.582;TB332

Effect of recycled carbon fiber on the electrothermal properties of concrete

Funds: National Natural Science Foundation of China (52078414); Natural Science Foundation of Shanxi Province (2020JM-469)
  • 摘要: 碳纤维在生产使用过程中会产生大量的废弃料,将回收碳纤维(Recycle Carbon Fiber,RCF)掺入混凝土中既能减少RCF对环境造成的污染,又能实现高利用价值。本文研究了回收碳纤维混凝土(Recycle Carbon Fiber Concrete,RCFC)在不同RCF掺量下的力学性能、导电性能和电热性能。结果表明,随RCF掺量的增加,RCFC抗压强度降低,但抗折强度略有提升,而电阻率明显下降,最大降幅为99.11%。通电一定时间后,RCFC的热传导效果显著,且升温速率随着RCF掺量、输入电压的增加而增大。当环境温度为20℃、−10℃、−30℃ 时,能使RCFC产生电热性能的最小纤维掺量分别为1.0vol.%、1.5vol.%、2.0vol.%,所对应的最高升温速率分别是2.267℃/min、2.525℃/min和1.45℃/min。

     

  • 图  1  回收碳纤维(RCF)与原始碳纤维(VCF)外观

    Figure  1.  Recycle carbon fiber (RCF) and virgin carbon fiber (VCF) appearance

    图  2  RCF与VCF在水中分散性能

    Figure  2.  Dispersion properties of RCF and VCF in water

    图  3  RCF与VCF在SEM下微观形貌

    Figure  3.  The micro-morphology of RCF and VCF under SEM

    图  4  RCF的EDS能谱

    Figure  4.  EDS spectrum of RCF

    图  5  VCF的EDS能谱

    Figure  5.  EDS spectrum of VCF

    图  6  电热升温试验

    Figure  6.  Electrothermal heating test

    图  7  回收碳纤维混凝土(RCFC)力学和导电性能

    Figure  7.  Mechanical and electrical properties of recycle carbon fiber concrete (RCFC)

    图  8  RCFC内部搭接

    Figure  8.  RCFC internal lap joint

    图  9  20℃下RCFC的电热性能

    Figure  9.  Electrical and thermal performance of RCFC at 20°C

    图  10  −10℃下RCFC的电热性能

    Figure  10.  Electrical and thermal performance of RCFC at 20°C

    图  11  −30℃下RCFC的电热性能

    Figure  11.  Electrical and thermal performance of RCFC at 20°C

    图  12  RCFC传热机制

    Figure  12.  Heat transfer mechanism of RCFC

    图  13  10 V电压下RCFC升温速率

    Figure  13.  Heating rate of RCFC at 10 V voltage

    图  14  20 V电压下RCFC升温速率

    Figure  14.  Heating rate of RCFC at 20 V voltage

    图  15  30 V电压下RCFC升温速率

    Figure  15.  Heating rate of RCFC at 30 V voltage

    表  1  水泥化学成分/wt%

    Table  1.   Chemical composition of Cement/wt%

    SiO2Al2O3Fe2O3CaOMgOSO3K2ONa2OTiO2Else
    19.054.643.7158.282.453.921.110.280.316.25
    下载: 导出CSV
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出版历程
  • 收稿日期:  2024-01-17
  • 修回日期:  2024-03-06
  • 录用日期:  2024-03-13
  • 网络出版日期:  2024-04-20

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