In this research, in order to improvement the performance of the two-component mixed aggregate mixed with fine granite fine aggregate and seawater, the examination of the effect of reject ash on the cement mortar according to the change of substitution rate was done. As a result, it was found that the effect of improving the compressive strength is more effective when the rejection ash is replaced by 5% in the mixed aggregate than in the case of using the high quality aggregate.

• 현승용(청주대학교 건축공학과, 석사과정) | Hyun, Seong Yong 교신저자
• 백철(청주대학교 건축공학과, 석사과정) | Baek, Cheol
• 이제현(청주대학교 건축공학과, 석사과정) | Lee, Jea Hyeon
• 박구병(한국시설안전공단 건설안전본부장, 공학박사) | Park, Goo Byeong
• 한민철(청주대학교 건축공학과, 부교수, 공학박사) | Han, Min Cheol
• 한천구(청주대학교 건축공학과, 교수, 공학박사) | Han, Cheon Goo