[1319] INVESTIGATION OF FRESH BEHAVIORS AND MECHANICAL PROPERTIES OF CONCRETE PRODUCED BY AIR GRANULATED SPHERICAL SHAPED EAF SLAG FINE AGGREGATE
キーワード：EAF slag fine aggregate, fresh behavior, mechanical property, pavement concrete, spherical shape, フレッシュ性状, 力学特性, 球形, 舗装コンクリート, 電気炉酸化スラグ細骨材
This study aims to investigate the performance of spherical shaped EAF slag fine aggregate concrete. Two experimental series having W/C ratio of 0.4 and 0.6 were examined in this study to compare the effect of EAF slag fine aggregate. In each series, 4 types of concrete were produced for the slag replacement ratio of 0.0, 0.3, 0.5 and 1.0 and tested for fresh behaviors and mechanical properties after a curing age of 7 and 28 days. Higher bleeding was observed when sand is completely replaced by slag and this effect is pronounced for W/C of 0.6. Increase in mechanical behaviors with the increment of slag ratio was observed for W/C of 0.4. However, an opposite behavior was observed for W/C of 0.6. Fresh and mechanical behaviors indicate that spherical shaped EAF slag fine aggregate can be a good material for the W/C of 0.4.