성인이 다른 굵은 골재를 혼합사용한 콘크리트의 기초적 특성 분석

Abstract

*(Received February 24, 2015 / Revised March 25, 2015 / Accepted March 27, 2015)Recently, attempts of replacing some of natural aggregate with mix of low quality aggregate are carried out for stable supply of aggregate. However, low quality aggregate such as recycled aggregate produced during the disposal process of construction wastes and by-product aggregate produced by industrial activities has problem of failing to comply to KS Standards. Therefore, we have compared fundamental properties of concrete by using granite crushed aggregate, recycled aggregate, blast furnace and electric arc furnace slag aggregate for effective utilization of lacking aggregate resources. As the result, slump in case of mixed use of aggregate was increased 0~10% compared to single use. Therefore, it is judged to be economically advantageous as it can expect effects in unit quantity or reduction of SP agent. Compressive strength in case of mixed use of aggregate was increased 0~10% compared to single use as it filled internal crevice of concrete with continuous particle size distribution. Accordingly, if we utilize by satisfying standard particle scope through mix of aggregate with different cause of formation in proper ratio, it was possible to confirm utility of mixed aggregate with demonstration of effects of increases of fluidity and compressive strength of concrete.키워드 : 화강암 부순골재, 순환골재, 고로슬래그 골재, 전기로 산화슬래그 골재, 혼합골재Keywords : Granite crushed aggregate, Recycled aggregate, Blast-furnace slag aggregate, Electric Arc furnace oxidizing slag aggregates, Mixed aggregate* Corresponding author E-mail: cghan@cju.ac.kr