Abstract
The heating mortar block system for melting snow, which absorbs radio waves and converts them into heats, requires a strong wide band electromagnetic wave absorber that withstand bending loads caused by walking. And the wide band electromagnetic wave absorber can be manufactured cheaply and easily with general equipment by vibrating mortar mixed with electric arc furnace oxidizing slag and styrofoam beads.
This uses the fact that styrofoam beads have lower density, complex relative permittivity and complex relative permeability than electric arc furnace oxidizing slag, therefore the styrofoam beads and the electric arc furnace oxidizing slag separated by vibration to form a multi-layered electromagnetic wave absorber. Therefore, mortar containing electric arc furnace oxidizing slag and styrofoam beads as aggregate become wide band electromagnetic wave absorber that complex relative permittivity and complex relative permeability gradually increase from radio wave irradiation side by vibrating with table vibrator.
In order to use this mortar as wide band electromagnetic wave absorber in the heating mortar block system for melting snow, it is considered necessary to ensure both strength that withstand bending loads caused by walking and fluidity during vibration. Therefore, we will adjust the strength and fluidity by changing the water cement ratio and the amount of high range AE reducing agents, and investigate the mixing of wide band electromagnetic wave absorber that satisfies the bending strength standard. From the above, within the range of measurements, for the same water cement ratio, the return loss increases with the amount of high range AE reducing agents, except in the case of peaks occurring, and any mixing satisfied the bending strength standard.
