저속습식 마쇄방법과 황산수를 이용한 고품질 순환잔골재 제조방법에 관한 실험적 연구 = An Experimental Study on the Manufacturing Method for High Quality Recycled Fine Aggregate Using Low Speed Wet Abraser and Sulfuric Water

다국어 초록 (Multilingual Abstract)

Recycled aggregate, produced by crushing waste concrete, can be used for many purposes. The use of recycled aggregate can save money for our society, create additional business opportunities, save energy when recycling is done on site, and conserve diminishing resources of urban aggregates. However the usage is limited to a lower value-add product such as the roadbed material. While the research and the development have been performed to produce the high quality recycled aggregate, recycled fine aggregate has low quality because it contains large amount of old mortar. To produce the high quality recycled aggregate, breaking and washing process must be added to the existing process to remove the ingredient of old mortar from aggregate. This paper is aim to develop the high quality recycled aggregate. The ingredient of cement paste is removed from recycled fine aggregate using both the low speed wet abrasional crusher as mechanical process and the acid treatment as chemical processes. Consequently, the optimum condition for this process is investigated for high quality recycled fine aggregate by using the design of experiments. For the result, recycled fine aggregate with dry density 2.51 and absorption ratio 2.3%, satisfying Korean standard for recycled fine aggregate, was made by this mechanical and chemical process.

참고문헌 (Reference)

1 박성현, "현대 실험 계획법" 민영사 53-469, 2006

2 김진만, "산처리에 의한 순환골재의 물리적 성질에 관한 실험적 연구, (시멘트의 석회성분을 황산과 염산에 의한 처리하여 골재 품질에 관한 시험)" 05 : 331-335, 2006

3 건설교통부, "구조용 재생골재 및 재생골재콘크리트 구조물의 장기안정성에 관한 연구" 건설교통부 2005

4 주택도시연구원, "건설폐기물 재활용 정책 및 기술개발 동향" 주택도시연구원 2006

5 건설교통부, "건설산업폐기물의 리싸이클링시스템 및 재활용 기술개발에 관한 연구" 건설교통부 1997

6 阿部道彦, "コンクリ-ト用再生骨材" 35 (35): 42-48, 1997

7 A. M. Neville, "Properties of concrete, Fourth and Final Ed" 245-249, 1996

8 Sidney Mindess, "Concrete, Second Ed" Pearson Education, Inc. 211-, 2003

9 P. Kumar Mehta, "Concrete(Structure, Properties and Materials), Second Ed" 71-147,

10 김진만, "A Study on the Quality and Properties of Mortar of Recycled Fine Aggregate through Acid Treatment" 133-136, 2006