碳化硅混凝土微波加热效率及抗冻性
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TU 528

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国家自然科学基金(51908548),国家人民防空办公室立项课题(RF20SC01J-S0),军队科研面上项目(CKY14J017)


Research on Microwave Heating Efficiency and Frost Resistance of Silicon Carbide Concrete
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The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    通过微波加热试验、冻融循环试验、SEM试验及MIP试验,对碳化硅混凝土的微波加热效率、抗冻性及冻融循环前后的微观结构进行研究。结果表明:掺加碳化硅能够提高混凝土的微波加热效率和抗冻性。随着碳化硅掺量的增加,混凝土的温升速率逐渐增大,微波加热效率提高,有效除冰范围增大。当碳化硅掺量为10%时,混凝土相对动弹性模量最大,质量损失率最小,抗冻性最佳。掺加碳化硅使混凝土内部孔隙增大,冻融循环使混凝土孔隙孔径增大,少害孔以及有害孔增多。

    Abstract:

    Through microwave heating test, freeze-thaw cycle test, SEM test and MIP test, the microwave heating efficiency, freeze resistance and microstructure of silicon carbide concrete before and after the freeze-thaw cycle are studied. The results show that the addition of silicon carbide can improve the microwave heating efficiency and frost resistance of concrete. As the content of silicon carbide increases, the temperature rise rate of concrete gradually increases, the microwave heating efficiency increases, and the effective deicing range increases. When the content of silicon carbide is 10%, the relative dynamic elastic modulus of concrete is the largest, the mass loss rate is the smallest, and the frost resistance is the best. The addition of silicon carbide increases the internal pores of the concrete, and the freeze-thaw cycles increase the pore size of concrete, and increase the number of less harmful pores and harmful pores.

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王志航,白二雷,刘俊良,等. 碳化硅混凝土微波加热效率及抗冻性[J]. 科学技术与工程, 2022, 22(20): 8821-8827.
Wang Zhihang, Bai Erlei, Liu Junliang, et al. Research on Microwave Heating Efficiency and Frost Resistance of Silicon Carbide Concrete[J]. Science Technology and Engineering,2022,22(20):8821-8827.

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历史
  • 收稿日期:2021-12-24
  • 最后修改日期:2022-04-16
  • 录用日期:2022-03-04
  • 在线发布日期: 2022-08-04
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