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세척수 종류별 마쇄에 따른 순환 잔골재의 품질 변화에 대한 실험적 연구
선정수,김재원,김하석,임대빈,이도헌,김진만 대한건축학회지회연합회 2006 대한건축학회지회연합회 학술발표대회논문집 Vol.2 No.1
The purpose of study is to improve the quality of recycled fine aggregate thet is generated from waste concrete. It is experimented with Abrasional Crusher over a kind of washning water. And Used it is carbonated water, acid water . Test items is the density, absorption ratio, passing ratio, XRD and XRF . As a result of the study, the more old mortal that is contained in the recycled fine aggregate through Abrasional Crusher process is removed, the better the quality of recycled fine aggregate is improved
건식공정 석탄 바닥재를 기반으로 한 유기계 인공토양의 기초적연구
홍성록,박헌일,선정수,김진만 한국폐기물자원순환학회 2015 한국폐기물자원순환학회지 Vol.32 No.3
A general method to expand the urban green space is to utilize the artificial ground that is unutilized in cities, such as buildings and rooftops. The processing technology of bottom ashes in thermal power stations shows a tendency to change from the wet process to the dry process. The dry process bottom ashes, which arise from the new process, are expected to be utilized as light-weight artificial soil, because they are poor in water, salt, and unburned carbon, which are not the characteristics of the existing wet process bottom ashes, and have a lower density than general aggregate. This study shows that the coefficient of permeability, saturation bulk density, pH, EC, and organic matter content of dry process bottom ashes are similar to those of perlite. Therefore, we conclude that dry process bottom ashes can be utilized as artificial soil.
황산수와 저속 습식 마쇄법으로 생산한 순환잔골재를 사용한 모르터의 압축강도에 관한 실험적 연구
김하석,선정수,곽은구,임대빈,이도헌,김진만 대한건축학회지회연합회 2007 대한건축학회지회연합회 학술발표대회논문집 Vol.2007 No.1
Waste concrete has been increased by an acceleration of the development of urban and the enlargement of redevelopment projects, so recycling of waste concrete is actively progressed. However the usage is limited to a lower value-add such as the roadbed material etc. Now, the research and the development have been performed to produce the high quality recycled aggregate. However recycled fine aggregate has low quality because it contains large amount of old mortar. Thus to produce the high quality recycled aggregate, breaking and washing process must be added to the existing process and the ingredient of old mortar must be removed from aggregate. Also, alkaline water which occur from treatment process of the waste concrete is becoming the cause of environmental problem. Accordingly, this research is to develop on the high quality recycled fine aggregate produced by low speed wet abraser using sulfur and investigated the engineering properties of the mortar used the recycled fine aggregate by this process. Test results indicate that recycled fine aggregate by acid treatment process satisfies the quality standards of KS F 2573 (recycled fine aggregate for concrete) for the first-grade recycled fine aggregate. It is also shown that strength of mortar using recycled fine aggregate by this process was great to that using recycled fine aggregate removed under 0.15mm powder by sieving.