MECHANICAL PROPERTIES OF THE CONCRETE WITH CALCINED ELECTRIC ARC FURNACE OXIDIZING SLAG AS COARSE AGGREGATE AFTER HIGH TEMPERATURE HEATING

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  • 粗骨材に焼成した電気炉酸化スラグを用いたコンクリートの高温加熱後の力学的特性

Abstract

<p>When electric arc furnace oxidizing slag gravel (EFG) was used as coarse aggregate, cracks were easily formed after high temperature heating. It is assumed that the transformation of wustite to magnetite by heating caused the volumetric expansion of EFG and the concrete specimens developed cracks. It is assumed that concrete with EFG calcined for volume expansion heating at 500℃ decrease crack. The effect of calcined EFG on mechanical properties after high temperature heating was confirmed. Concrete with EFG calcined at 600°C showed a decrease in cracking of the specimens, and at 1000°C, no cracking was observed.</p>

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