Waste concrete powder generated during the process of recycling waste concrete into aggregate has a low recycling rate. This is because fine particles of waste concrete powder and cement components are present. Therefore, in this study, waste concrete powder is used as a raw material for centrifugal concrete. Experimental results show that waste concrete powder has cement and aggregate composition, SEM image has irregular shape, C-S-H and Ettringite exist inside. Waste concrete powder showed the same strength, up to 5% in terms of strength by age according to the substitution rate. Also, as the strength characteristics varied according to the centrifugal forming force, the substitution rate of siliceous matter increased by 5% and the strength decreased by substitution rate of 5%. Because of this study, it is considered difficult to use waste concrete powder as a substitute for silica sand because of the resulting characteristics of centrifugal concrete. It is recommended that economic and environmental concerns be considered when some substitution is made for silica sand.

Abstract
 I. 서 론
 II. 실험계획 및 방법
  1. 실험계획
  2. 사용 재료
  3. 시험 방법
 III. 실험결과 및 고찰
  1. 목표 슬럼프를 위한 SP 첨가량
  2. 강도특성
  3. 원심력 성형에 의한 강도 특성
 IV. 결 론
 References

• 김봉주(공주대학교 건축공학과) | Bong-Joo Kim (Dept. of Architectural Engineering, Kongju National University) Corresponding author
• 정의인(공주대학교 건축공학과) | Ui-In Jung (Dept. of Architectural Engineering, Kongju National University)
• 곽은구(이씨엠 테크) | Eun-Gu Kwak (ECM Tech)