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)

서지정보

· 발행기관 : 대한건축학회
· 수록지 정보 : 대한건축학회논문집 구조계 / 24권 / 5호 / 109 ~ 116페이지
· 저자명 : 김진만, 김하석, 박선규, 곽은구, 선정수

초록

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.

영어초록

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.

참고자료

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