电磁混凝土发热性能试验研究

Experimental Study on Heating Performance of Electromagnetic Concrete

在混凝土中预埋铁片和铝箔纸作为发热材料,利用电磁热效应快速加热混凝土,探究混凝土发热性能的影响因素。研究结果表明:铁片混凝土与铝箔纸混凝土的发热速率及发热温度效果都较好;面积越大的铁片,混凝土升温速率越快;虽然厚度大的铁片可以存储更多热量,但要使混凝土温度达到最大值,需要耗费更多时间;影响铝箔纸混凝土温度的因素主要是铝箔纸的面积,且面积与其温度的增加成正相关;在升温阶段,面积大的铝箔纸其混凝土发热速率快,达到最大温度的时间短;在降温阶段,铝箔纸面积对其混凝土温度的影响可忽略不计。

Iron sheets and aluminum foil were embedded in the concrete as heating materials, and the elec-tromagnetic heating effect was used to heat the concrete quickly to explore the influencing factors of the heating property of concrete. The results show that the heating rate and temperature effect of iron sheet concrete and aluminum foil concrete are better. The larger the area of iron sheet, the faster the heating rate of concrete;Although thicker sheets of iron can store more heat, it takes more time for concrete to reach its maximum temperature. The main factor affecting the temper-ature of aluminum foil concrete is the area of aluminum foil paper, and the area is positively cor-related with the increase of temperature. In the heating stage, the heating rate of concrete of alu-minum foil paper with large area is fast, and the time to reach the maximum temperature is short. In the cooling stage, the influence of the area of aluminum foil on the temperature of concrete is negligible.