In this study, the vibratory crusher was developed to develop the high quality recycled coarse aggregate for concrete. The vibratory crusher was installed on the production line of recycled aggregate and the produced recycled aggregate was compared with that from conventional crusher for evaluation of the performance of vibratory crusher and the quality of the produced recycled aggregate. The results showed that the performance of the recycled aggregate was better than conventional aggregate by 39% in water absorption ratio, 10% in absolute dry density, 31% in resistance to wearing, 14% in satisfactory particle size distribution, 41% in volume of clay ball and 32% in safety, thus showing that the quality of the recycled coarse aggregate is much improved. The microscopic observation showed that a lot of mortar, minute cracks and segregation have been removed.

Abstract
 I. 서 론
 II. 순환골재 생산라인 및 파쇄기술
  1. 생산라인의 개요
  2. 진동식 크러셔 시스템
 III. 실험계획 및 방법
 IV. 실험결과 및 고찰
  1. 흡수율 및 절대건조밀도
  2. 입도 분포
  3. 마모감량
  4. 입자모양판정실적률
  5. 점토덩어리량
  6. 안정성
  7. 이물질 함유량
  8. 표면 관측(SEM)
 V. 결 론
 References

• 조현대(대구대학교 건축공학과) | Hyun Dae Cho
• 도재범(대구대학교 건축공학과) | Jae Beom Do
• 김보수(케이디에스) | Bo Soo Kim
• 정재동(대구대학교 건축공학과) | Jae Dong Jaung Corresponding author