This study aimed to determine adhered mortar content of recycled aggregate (RA) using microwave irradiation (700W)and mixed solution of hydrochloric acid (HCl) and hydrogen peroxide (H2O2). The optimum condition was first to soakRA in tap water for 30 min and then RA was soaked in mixed solution of 30% HCl and 15% H2O2 (HCl:H2O2=1:2) for 70-90min after 15-min microwave irradiation. The mortar of RA in the condition was completely removed within2.3 hrs. Reaction rate (k) with the condition was −0.6408hr−1, which was about 190 times faster than that with HCl only(k=−0.0034hr−1).

I. 서 론
 II. 실험계획 및 방법
  1. 실험재료
  2. 실험방법
 III. 결과 및 고찰
  1. 과산화수소 농도 변화에 따른 누적모르타르 제거효율
  2. 마이크로웨이브 조사에 따른 누적모르타르 제거효율
  3. 마이크로웨이브/혼합용액 및 염산 단독 처리에 따른누적모르타르 제거효율 비교
  4. 마이크로웨이브/혼합용액 및 염산단독처리에 따른유사일차반응
  5. 순환골재 처리에 따른 성상 변화
  6. 순환골재 표면관찰
  7. 반응 매커니즘
  8. 연구결과 분석
 IV. 결 론
 감사의 글
 References

• 변민우(강원대학교 공과대학 환경공학과) | Min-Woo Byeon
• 안종화(강원대학교 공과대학 환경공학과) | Johng-Hwa Ahn Corresponding author