复合吸波材料对混凝土微波加热性能的影响

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (1): 128-137.

复合吸波材料对混凝土微波加热性能的影响

吴刚¹, 陈伟²

1.济南市槐荫区工程质量与安全中心,济南 250021;
2.浙大宁波理工学院土木建筑工程学院,宁波 315100

收稿日期:2023-09-06 修订日期:2023-10-26 出版日期:2024-01-15 发布日期:2024-01-16
作者简介:吴刚(1975—),男,高级工程师。主要从事工程材料方面的研究。E-mail:wugang19751201@163.com
基金资助:
浙江省自然科学基金重点项目(LY20E080002)

Effect of Composite Absorbing Material on Microwave Heating Property of Concrete

WU Gang¹, CHEN Wei²

1. Jinan Huaiyin District Engineering Quality and Safety Center, Jinan 250021, China;
2. School of Civil Engineering and Architecture, Ningbo Tech University, Ningbo 315100, China

Received:2023-09-06 Revised:2023-10-26 Online:2024-01-15 Published:2024-01-16

摘要/Abstract

摘要： 鉴于单一吸波材料对提高混凝土微波加热性能的局限性,本文将石墨粉和Fe₃O₄作为复合吸波材料掺入混凝土。通过力学性能测试,确定了复合吸波材料的合适掺量;通过微波加热试验,研究了复合吸波材料对混凝土微波加热性能的影响;通过电磁参数测试,分析了复合吸波材料的影响机理,并与单掺石墨粉、Fe₃O₄时进行了比较分析。结果表明,石墨粉和Fe₃O₄的掺入均会降低混凝土的力学性能,吸波材料的掺量不宜超过6%(质量分数)。随着石墨粉、Fe₃O₄单掺掺量的增大,混凝土的微波加热性能不断增大。当石墨粉和Fe₃O₄复掺时,混凝土的微波加热性能更佳,最佳复掺比例为m(石墨粉)∶m(Fe₃O₄)=2∶1;混凝土的复介电常数、介电损耗角正切、复磁导率和磁损耗角正切均显著增大,介电损耗能力和磁损耗能力同时显著提高。

关键词: 混凝土, 石墨粉, Fe₃O₄, 微波加热, 介电损耗, 磁损耗

Abstract: In view of the limitation of a single absorbing material to improve the microwave heating property of concrete, graphite powder and Fe₃O₄ were incorporated into concrete as composite absorbing material. The appropriate content of the composite absorbing material was determined by mechanical properties test. The effect of composite absorbing material on microwave heating property of concrete was studied by microwave heating test. The influence mechanism of the composite absorbing material was analyzed by electromagnetic parameter test. Meanwhile, the results were compared with those of the separate addition of graphite powder and Fe₃O₄. The results show that the addition of graphite powder and Fe₃O₄ can reduce the mechanical properties of concrete, and the content of absorbing material should not exceed 6% (mass fraction). The microwave heating property of concrete increases with the increase ofseparate addition of graphite powder and Fe₃O₄. When graphite powder and Fe₃O₄ are incorporated, the microwave heating property of concrete is better, and the best mix ratio is m(graphite powder)∶m(Fe₃O₄)=2∶1. When graphite powder and Fe₃O₄ are incorporated, the complex permittivity, dielectric loss angle tangent, complex permeability and magnetic loss angle tangent of concrete significantly increase, and the dielectric loss capacity and magnetic loss capacity significantly increase at the same time.

Key words: concrete, graphite powder, Fe₃O₄, microwave heating, dielectric loss, magnetic loss

中图分类号:

TU528

吴刚, 陈伟. 复合吸波材料对混凝土微波加热性能的影响[J]. 硅酸盐通报, 2024, 43(1): 128-137.

WU Gang, CHEN Wei. Effect of Composite Absorbing Material on Microwave Heating Property of Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(1): 128-137.

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