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발포폴리스티렌비드를 사용한 경량골재 콘크리트의 패널적용을 위한 실험적 연구
사순헌,이종찬,지석원,정광량,서치호 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)
Because lightweight concrete with expanded polystyrene beads has properties of low density, low heat conductivity, it can be used in lightweight structural material and heat insulation layer. But application of this material in buildings is insufficient yet. One of application in building is panel, like non-structural partition used inside, has low compressive strength. So the purpose of this study is to lead the fundamental data to improve low strength of lightweight concrete with polystyrene beads by mixing silica fume and curing methods for application to dry lightweight panel of building, which is based on the mechanical property of lightweight concrete using polystyrene beads, and to examine suitability of polystyrene beads as composition material of panel from the above result. Unit volume weight of fresh concrete is 0.5-0.61t/m³ in EPSB substitution rate 70% and 0.27 -0.33t/m³ in EPSB substitution rate 80%, and compressive strength as increase of silica fume substitution rate is increased but, batch in EPSB substitution rate 80% has low compressive strength rate. Compressive strength by curing method was higher by high temperature(60˚C, seal up).
메카카올린과 시멘트 킬른 더스트를 사용한 3성분계 시멘트 모르타르의 역학적 특성에 관한 연구
임진혁(Yim Jin-Hyuk),사순헌(Sa Sun-Heon),김상헌(Kim Sang-Heon),지석원(Ji Suk-Won),서치호(Seo Chee-Ho) 대한건축학회 2008 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.28 No.1(구조계)
Replacement of cement by admixture which is one of the methods to improve concrete performance has contributed to improvement of concrete strength and durability. On this study, the mechanical properties of Ternary cement made from replacement of cement by various admixtures such as Blast Furnaced Slag, Fly Ash and CKD was compared by replacing cement by Silica fume and Meta kaolin fundamentally. Especially this study was focused on establishing mechanical properties of ternary cement made from replacement of cement by CKD what is collected dust from the Kiln manufacturing cement. CKD having high fineness and alkalinity that can accelerate pozzolan reaction was effective for improving strength of Meta kaolin more than any other admixtures.
알칼리 활성화 반응에 의한 경량골재 콘크리트의 실험적 연구
위준우(We Joon-Woo),사순헌(Sa Soon-Heon),김상헌(Kim Sang-Heon),지석원(Ji Suk-Won),최수경(Choi Soo-Kyung),서치호(Seo Chee-Ho) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(구조계)
In this study, Blast Furnaced Slag was used as a substitute. Alkali-activated admixture was added for hardening concrete by chemical reaction. As analysing the compressive strength and the durability of light-weight aggregate concrete with BFS and Alkali-activated admixture, the fundamental data for application of light-weight aggregate concrete is considered to be offered. For the purpose, the proportion for the experiment was planned as 10%, 20% of Metakaolin(MK) replacement to binder by weight and admixed 6%, 8%, 10%, 12%, 14% of activator by binder weight in each proportion. As a result of the experiment, the proportion of non-MK(MK 0%) with 8% of Ca(OH)₂ at the age of 3, 7 days and with 12% of Ca(OH)₂ at the age of 2 weeks appeared the highest compressive strength, but it was lower than the strength of Plain batch. It is considered that late hydrate reaction of Blast Furnaced Slag(BFS) could effect to the early-age strength, on the other hand, the strength development appears by latent hydraulicity.
발수 코팅처리한 경량골재콘크리트의 흡수율 및 성상변화에 관한 실험적 연구
박승일(Park Seung-Il),사순헌(Sa Sun-Heon),김상헌(Kim Sang-Heon),지석원(Ji Suk-Won),서치호(Seo Chee-Ho) 대한건축학회 2008 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.28 No.1(구조계)
A main composition of the lightweight aggregate is a polycrystal qualitative plastic because of the fact, the characteristic of the aggregate is that the vast quantity of air gap is formed inside the aggregate. t As a matter of the characteristic, the moisture in the aggregates tends to move irregularly according to the change in the outer condition. Consequently a measure to solve the problem is needed. In this research as a part of the study on the performance improvement of light weight aggregates by coating, the absorptance variation and the change on time of the coated light weight aggregates were compared and analyzed for ensuring the workability of lightweight aggregates concrete by preventing from absorption to inner aggregates by impregnation of water repellent and oil repellent.
경량골재의 공극구조와 흡수특성에 따른 경량골재콘크리트 특성 평가 연구
박대오(Park Dae-Oh),사순헌(Sa Soon-Heon),김상헌(Kim Sang-Heon),지석원(Ji Suk-Won),최수경(Choi Su-Kyeong),서치호(Seo Chee-Ho) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.3
Lightweight aggregate mainly consist of multi-crystalline structure and has many internal pores. It may be abnormal water moving in lightweight aggregate on account of the change of external circumstance. The abnormal water moving is influenced by distribution, shape, size and prewetting and each factors considerably control it. Recently, in domestic and foreign construction industry, lightweight aggregate is delivered from factory with controlling lightweight aggregate's water absorption to improve workability. But, unfortunately, there are few studies about workability and mechanical property which is influenced by controlling the percentage of water absorption. In this study, we analyzed the pore system and water absorption characteristic of domestic and foreign lightweight aggregate. And that acquired the experimental data about mechanical properties and frost resistance of lightweight aggregate concrete according to the pore system and water absorption characteristic, makes a good use of lightweight aggregate concrete.