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소승영(So, Seung-Young),이제방(Yi, Je-Bang),장칩도르지(Khulgadai, Janchivdorj),소형석(So, Hyoung-Seok) 대한건축학회 2011 大韓建築學會論文集 : 構造系 Vol.27 No.12
This paper reports development characteristics of strength and microstructure of RPC (reactive powder concrete) containing meta-kaolin, in order to use meta-kaolin as the substitutive material of silica fume, which is so expensive in Korea. Various RPC containing meta-kaolin were made by replacement ratio of meta-kaolin and different curing conditions, and their mechanical properties, hydration products and pore structures were investigated. The result has shown possibility of meta-kaolin as a substitutive materials of silica fume in RPC. It was also shown use of meta-kaolin is invaluable for increase of strength at very early age (1 day), and expecially for the improvement of flexural strength than compressive strength. The effect of strength improvement in RPC containing meta-kaolin could be explained based on the analysis of hydration products and pore structure of them by XRD, SEM and MIP(mercury intrusion porosimetry) technique.
다양한 유/무기계 항진균제를 이용한 항균모르타르의 항곰팡이 성능 평가
소승영(So, Seung-Young),이민수(Lee, Min-Su),장홍석(Jang, Hong-Seok),소형석(So, Hyoung-Seok) 대한건축학회 2014 大韓建築學會論文集 : 構造系 Vol.30 No.3
This study discuss the antifungal performance of antifungal mortars with various organic and inorganic antifungal agent on the five kinds of mold: Chaetomium globosum, Aspergillus niger, Aureobasidium pullulans, Gliocladium virens and Penicillium pinophilum, which can be easily discovered in the interiors and exteriors of buildings. Various antifungal mortars using organic and inorganic antifungal agents were made in this study, and the antifungal performance, the durability of antifungal activity and chemical stability of them were investigated. As the results, the antifungal mortar with 10% Df-45 of organic antifungal agent exhibited the outstanding antifungal activity as well as the durability of antifungal activity. The antifungal mortars with inorganic antifungal agents presented overall the low antifungal activity and durability of antifungal activity, relatively.
모르타르 내 염화물 고정화와 중성화의 상호영향에 관한 연구
소승영(So Seung-Young) 대한건축학회 2003 大韓建築學會論文集 : 構造系 Vol.19 No.7
Chloride ions introduced into the concrete through m ix ingredients such as unw ashed chloride-contaminated coastal sands used as fine aggregates and enter concrete from outside sources during the service life of structures. If Chloride ions exist in the vicinity of the steel w ill show pitting corrosion even though the pH of the environment is higher than 11.0. Carbonation of cover concrete is considered one of the most common culprits in the corrosion of steel in concrete. It breaks down the passive film and allows the steel to corrode actively at a high rate. The main objective of this study is to investigate the interrelationship between chloride binding and speed of carbonation by conducting an accelerated carbonation test on mortar which chlorides were m ixed. It was found that chloride-bearing mortar were accelerated carbonation and the Friedel's salt were broken down in carbonation. Also CO₂ has affected Ca(OH)₂ and ettringite. The amount of chlorides in non-carbonation zone is twice as much as adding chlorides because chlorides in carbonation is to move toward the non-carbonation zone.
소승영(So, Seung-Young),이현희(Lee, Hyun-Hee),서붕교(Seo, Boong-Kyo) 한국주거환경학회 2014 주거환경(한국주거환경학회논문집) Vol.12 No.4
The purpose of this study was to improvement of supply system for public rental housing considering social change and demands as stated above. With the respect, it will indicate pending issues and derive solutions from comparison of users" and plan participants" awareness. Through consciousness survey of plan participants and users of public rental housing, this study extracted key words for improvement directions and analyzed their consciousness. The results are summarized as follows: The interests of the residents are the lives of the residents to affect for their lives. However experts required at the planning stage, very interested social mix, maintenance issues, etc, the life of the residents did not leave a big concern. Managers in planning stage for the development floor plan type change, public institutions, experts involved in the construction professionals, architects concerned that it is important to be able to minimize the change of the parent plan. However, the rent should be placed in convenient transportation area, move away from large-scale housing estates in development, there are important points that an early build of the various infrastructure shows the consensus. In addition, funding for rental housing has also seen a general consensus that the role of the government as very important. Group-specific characteristics and differences over consciousness proposed to improve the underlying problems and issues related to the direction of public rental housing.
강섬유 보강 초고강도 시멘트 복합체의 강도발현 특성에 관한 실험적 연구
소형석(So Hyoung-Seok),소승영(So Seung-Young) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.7
Recently, considerable effort has been invested in research and development more highly effective construction materials due to the increasing of the multi-storied and large-sized buildings. The ultra-high strength steel fiber reinforced cementitious composites (UHS-SFRCC) are an ultra-high strength and high ductility composite material with advanced mechanical properties,and has shown some promise in the civil engineering community. In this study, as a series of the planned research to develope the practical UHS-SFRCC considered an economical efficiency. various UHS-SFRCC were made by some experimental factors such as the type and replacement ratio of admixture material, use of an alkaline stimulant, curing conditions, and the influence of experimental factors on strength development of UHS-SFRCC was discussed with the microstructure of them. As a results, the total porosity of UHS-SFRCC was significantly reduced by using appropriate silica fume and blast furnace slag combined, in consequence, the compressive and flexural strength was increased. There was no effect of NaOH as an alkaline stimulant to improve the compressive and flexural strength of UHS-SFRCC.. The total porosity of UHS-SFRCC was significantly reduced by the steam curing (90℃, but the volume of pore diameters with large size in the composites was also increased. The UHS-SFRCC with the range of compressive strength 154MPa and flexural strength 33MPa was made using silica fume, blast furnace slag, quartz sand(below 0.5mm), steel fiber in the atmosphere curing condition of 20℃.
고로(高爐)슬래그 미분말(微粉末)을 활용(活用)한 블랙-컬러모르타르 특성(特性) 및 색상발현(色相發現)에 관한 연구(硏究)
김설화,장홍석,소승영,Kim, Seol-Hwa,Jang, Hong-Seok,So, Seung-Young 한국자원리싸이클링학회 2010 資源 리싸이클링 Vol.19 No.6
본 연구는 생산원가 절감은 물론 에너지절감 및 환경보존을 목적으로 산업부산물인 고로슬래그 미분말을 컬러콘크리트의 활용방안으로 모색하고자 색상발현에 어려움이 있는 블랙색상을 선택하여 고로슬래그 미분말의 혼입률에 따른 기초 물성 및 색상발현정도 등을 확인하였다. 산업부산물인 고로슬래그 미분말을 활용한 컬러모르타르는 안료의 혼입시 유동성이 떨어지는 경향을 나타내었으나 입자표면이 산성피막에 의해 치밀하고 매끈하며 잠재수경성의 특성을 가진 고로슬래그 미분말의 혼업률에 비례하여 유동성이 증가하였다. 또한 일반 백색시멘트를 활용한 컬러모르타르보다 초기강도는 낮았으나 혼입시 우수한 장기강도 발현성을 나타내었다. 특히 현재 컬러콘크리트 시공시 색상발현에 가장 적합한 백색시멘트와 비교하여 동동하거나 그 이상의 색상발현성을 나타내었으며 명도 값 -30이하의 우수한 검정색상 발현이 가능하였다. In the many kind of construct-material, the concrete which has the high-strength and a durability is sufficient to use with structure-material. but the color of concrete is very monotony, so generally concrete isn't used the out surface. although color concrete is a method of expressing surface, the combination of pigment and cement cause many physical problem such as efflorescence phenomenon, strength degradation and so on. In this study, It attempt to develop the black mortar using the industrial granulated blast furnace slag and to evaluate basic physical properties compare with general color concrete to solve the color concrete problem. The result of experiment showed that the flow dropped mixing of pigment. but flow increased in proportion to the mixing rate in occasion of mortar that mix granulated blast furnace sla and black mortar which was made granulated blast furnace slag has more visible black color than any mortar.