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분쇄 효율에 따른 순환골재 분말 혼입 모르타르의 특성 KCI 등재

Characteristics of Recycled Aggregate Powder Containing Mortar Depending on Grinding Efficiency

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한국구조물진단유지관리공학회 논문집 (Journal of The Korea Institute for Structural Maintenance and Inspection)
한국구조물진단유지관리공학회 (The Korea Institute For Structural Maintenance and Inspection)
초록

본 연구에서는 분쇄한 순환골재 분말(RAP)을 건설소재로 활용하기 위하여 순환골재 및 RAP의 재료적 특성을 파악하고, 시멘트 대체재로 RAP를 적용한 모르타르의 물리·역학적 특성을 분석하였다. RAP 입도분석결과, 볼밀 시간이 증가함에 따라 0.6mm 입도의 분포량이 증가하고, 조립률은 감소하는 것으로 나타났다. RAP를 치환한 모르타르의 유동성은 Plain 보다 향상되었으며, 이는 RAP를 결합재 대체재로 적용함으로서 잉여수의 증가하고 이로 인해 유동성이 증가된 것으로 판단된다. RAP를 적용한 모르타르의 압축강도 평가 결과, 치환율이 증가함에 따라 압축강도가 낮아지는 경향을 나타내었지만, 약 10%까지는 치환하여 사용가능한 것으로 판단된다. 이상의 연구로부터 분말화한 순환골재는 잔골재 대체재로서도 품질특성을 만족할 수 있는 것으로 나타났으며, 본 연구 범위에서는 결합재 대체재로 약 10% 적용시 유동성 개선 및 강도 확보가 가능할 것으로 판단된다.

In order to evaluating applicability of RAP (recycled aggregate powder) in mortar, in this study, physical and mechanical tests was carried out. Material characteristics of recycled aggregate and RAP were evaluated and the mechanical properties of mortar replaced with RAP were analyzed. Test result of sieve analysis showed that as the milling time increased the fineness modulus was decreased and the distribution of 0.6 mm particle size was found to increase. The fluidity of mortar mixture substituted with RAP tended to increase than Plain mixture. It was result that the increasing fluidity was affected by unreacted surplus water in the mortar as the binder was replaced with RAP. From the compressive strength result of the mortar subjected to RAP, it was found that the RAP was able to replace up to about 10% of unit binder weight although the compressive strength of mortar was decreased as the RAP replacement increased. From the above study, it can be concluded that the physical properties of RAP satisfied the quality standard of aggregate for replacement with fine aggregate. Moreover, in case of the RAP was replaced up to 10% of unit cement weight, it was able to be possible to improve fluidity and compressive strength of mortar.

목차
Abstract
 1. 서 론
 2. 실험계획
  2.1 RAP의 제조 조건 및 실험범위
  2.2 사용재료
  2.3 실험방법
  2.4 공시체의 제작
 3. 실험결과 및 고찰
  3.1 RAP 특성
  3.2 모르타르 유동특성
  3.3 모르타르 압축강도
 4. 결 론
 References
 요 지
저자
  • 방진욱(㈜동양 기술연구소) | Jinwook Bang
  • 장영일(충남대학교 건설공학교육과) | Youngil Jang (Department of Construction Engineering Education, Chungnam National University) Corresponding author
  • 이종원(충남대학교 융복합시스템공학과) | Jongwon Lee
  • 문석호(충남대학교 건설공학교육과) | Seokho Mun (Department of Construction Engineering Education, Chungnam National University)
  • 추현승(충남대학교 건설공학교육과) | Hyunseung Chu (Department of Construction Engineering Education, Chungnam National University)