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자기수평 모르타르의 재료분리저감을 위한 고성능 유동화제와 증점제의 최적 조성비에 관한 실험적 연구
오상근(Oh Sang-Keun),채우병(Chae Woo-Byung) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.10
Superplaticizers and thickners are additives used to control the balance between the fluidity and the stability of self-leveling mortars. This experimental study is intended to find out the optimal ratio of these two additives which minimizes the segregation of the self-leveling mortar during its application, while maintaining the sufficient level of fluidity at the same time. Naphthalene, melamine and polycarbonate-based superplasticizers were tested along with the following choice of thickners: Polysaccharide (PS) and hydroxyethylcellulose (HEC). As a result, the most effective composition of self-leveling mortar turned out to be 0.519% polycarbonate-based superplaticizer with 0.002587% of PS and 0.155844% of HEC in the ratio by the weight of the inorganic binders. This composition not only enhanced the mortar stability without loss of its high-fluidity, but was able to prevent the segregation of material completely.
인공지반녹화용 멤브레인 방수 및 방근재료의 방근성능 평가 방법 제안 연구
오상근(Oh Sang-Keun),김영근(Kim Youn-Geun),신주재(Shin Ju-Jea),김현수(Kim Hyeon-Soo),권시원(Kwon Shi-Won) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.11
The purpose of this paper is to propose a standard test methods of resistance to root penetration for waterproofing and rootproofing membrane using green roof system. Green roof system is considered to be an important subject in construction industry for green growth project. At the same time, we have to consider the counterplan for protection the damage of waterproofing layer and concrete substrate from the penetration of plant root. But many kinds of materials for protection from root penetration are using in construction field. But the performance of those materials is not clear, and there is not test methods for the evaluation of performance. So in this paper, based on the research results of 4 institutes during four years and foreign cases, we made a standard test methods of resistance to root penetration for waterproofing and rootproofing membrane using green roof system. This test method deals with about environmental condition of laboratory, experimental facilities, kinds of plant, specimen of test , management methods, evaluation duration and documents, etc.