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경량기포콘크리트(ALC)의 혼화재 및 규석입도에 따른 성능개선
김영엽,송훈,이종규,추용식 대한건축학회 2007 大韓建築學會論文集 : 構造系 Vol.23 No.8
Recently, the use of autoclaved lightweight concrete(ALC) has became increasingly popular. ALC is a unique building material. Because of its cellular nature, it is lightweight, self-insulating, sound and fireproof, as well as insect and mold resistant. Furthermore, ALC is free of VOCs and various fibers associated with wood and glass wool construction. However, ALC have high water absorption, low compressive strength and popout the origin of the low surface strength in its properties. These properties make troubles under construction such as cracking and popout. Thus, this study is to improve the fundamental strength by controls of increasing of admixtures, SO3 ratio's and silica powder size. Admixtures make use of metakaolin, silica fume, sodium silicate and sodium hydroxide. From the test result, the ALC using admixture have a good fundamental properties compared with plain ALC. Compressive strength, specific strength and abrasion's ratio were improved depending on increasing admixtures ratio's, SO3 ratio's and silica powder size.
공간의 국지적 탐색을 통한 공공도서관의 입지평가 및 최적입지 선정
김영엽(Kim, Young-Youb),여관현(Yeo, Kwan-Hyun) 한국주거환경학회 2014 주거환경(한국주거환경학회논문집) Vol.12 No.4
This study analyzes the spatial equity of provision of public libraries targeted on Seoul city as well as the locational efficiency and superiority. This study utilizes microscopic exploration techniques in order to compensate the defects left by preceding studies and to maximize the usability of the study results. According to results, public libraries in seoul covers 51.4% of the whole area and 70.4% of the overall population in the city in 2010. It is interesting that there is a deviation among sub-regions. They are 21 sub-regions including Gangnam, Gwanak and Songpa where relatively large number of the regions with location superiority are identified. This study explores microscopically spaces to help evaluate the spatial equity and efficiency of public libraries and as it provides timely proper study results. Conclusionally, this study is expected to provide some profound knowledge and information that can contribute to the policies concerning the provision of public libraries.