THE EFFECT OF VIBRATION TIME OF THE MORTAR MIXED WITH ELECTRIC FURNACE OXIDIZING SLAGS, LIGHTWEIGHT FINE AGGREGATES AND STYROFOAM BEADS ON ELECTROMAGNETIC WAVE ABSORPTION PERFORMANCE

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  • ITO Yosuke
    NAGOYA INSTITUTE OF TECHNOLOGY, Graduate School of Architecture（Gokiso-cho, Syowa-ku, Nagoya-shi Aichi 466-8555, Japan）
  • KAWABE Shinji
    NAGOYA INSTITUTE OF TECHNOLOGY, Graduate School of Architecture（Gokiso-cho, Syowa-ku, Nagoya-shi Aichi 466-8555, Japan）
  • INOUE Yuta
    NAGOYA INSTITUTE OF TECHNOLOGY, Graduate School of Architecture（Gokiso-cho, Syowa-ku, Nagoya-shi Aichi 466-8555, Japan）
  • NAKAGAWA Kanato
    KAJIMA CORPORATION, Kanto Branch（Prime East BLD 5F, 2-1-1, Shimo-cho, Ohmiya-ku, Saitama-shi, Saitama 330-0844, Japan）

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Other Title
  • 電気炉酸化スラグ、軽量細骨材及び発泡スチロールビーズを混入したモルタルの加振時間が電波吸収性能に及ぼす影響

Abstract

<p>In order to prevent communication failure due to interference between devices using electromagnetic waves such as wireless LAN, it is sometimes required to install a wide band electromagnetic absorber on walls of buildings. With the aim of developing an electromagnetic wave absorber that can be easily manufactured at low cost to withstand large-scale use in general buildings, a new electromagnetic wave absorber is manufactured by vibrating mortar mixed with electric furnace oxidizing slags, lightweight fine aggregates and styrofoam beads.<br/>This utilizes the fact that lightweight fine aggregates and styrofoam beads have lower density, complex relative permittivity and complex relative permeability than electric furnace oxidizing slags, therefore the aggregates separated by vibration to form a multi-layered electromagnetic wave absorber. The effects of the vibration time of these mortars on the distribution of slag in the mortar and the return loss were investigated<br/>.As a result, it is difficult to change the electric furnace oxidizing slag distribution by vibration in a mortar using lightweight aggregate, and it is turned out that in a mortar using styrofoam beads, by the electric furnace oxidizing slag distribution changing, a multi-layered electromagnetic wave absorber having a gradually increased complex relative permittivity and complex relative permeability from the upper layer, where electromagnetic waves are emitted, to the lower layer is formed. From the above, it is clarified that a wide band electromagnetic wave absorber having sufficient performance can be easily manufactured by vibrating a mortar mixed with the electric furnace oxidizing slag and styrofoam beads.</p>

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