http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
아질산형 하이드로칼루마이트와 터폴리머 분말수지를 병용한 PCM의 강도 및 방청성
김완기,Kim, Wan-Ki 대한건축학회 2011 대한건축학회논문집 Vol.27 No.1
Nitrite type hydrocalumite is a material which can adsorb the chloride ions causing the corrosion of reinforcing bars and liberate the nitrite ions ($NO_2{^-}$) inhibiting the corrosion, and provides excellent corrosion-inhibiting property to the reinforcing bars in reinforced concrete by the addition of it to concrete. On the other hand, various redispersible polymer powders have been commercialized to manufacture the construction materials in the form of prepackaged-type products, which have rapidly been developed for lack of skilled workmen in construction sites. In recent years, terpolymer powders of improved quality have been developed and commercialized as cement modifiers. However, the properties of polymer-modified mortars using the terpolymer powders have not been studied till now. The purpose of the present paper is to examine the strengths and corrosion inhibition of polymer-modified mortars using a VA/E/MMA terpolymer powder with nitrite-type hydrocalumite (calumite) to develop the prepackaged-type materials for dry mortar. Polymer-modified mortars using a newly developed terpolymer powder as polymeric admixtures with the calumite are prepared with various calumite contents and polymer-binder ratios, and tested for strengths and corrosion inhibition. On the whole, the strength properties of VA/E/MMA terpolymer powder-modified mortars are considerably improved with an increase in the polymer-binder ratio regardless of the calumite content. and are remarkably improved over unmodified mortar. It is concluded from the test results that the replacement of the portland cement with the calumite causes a marked improvement in the corrosion-inhibiting property of the polymer-modified mortars.
강원도에 시설된(2000-2005년) 일반적인 4가지 종류의 인공어초에 관한 보존상태
김완기(Wan-Ki Kim),이지현(Ji-Hyun Lee),김대권(Dai-Kweon Kim),조규태(Qtae Jo),윤장택(Jang-Taek Yoon),공용근(Yong-Gun Gong),전찬길(Chan-Kil Chun) 한국항해항만학회 2008 한국항해항만학회 학술대회논문집 Vol.2008 No.공동학술
Stability and durability of the artificial reefs (ARs) for wildstock enhancement have been a key issue. We surveyed the stability of artificial reefs installed at Gangeung sites along the Gangwon coast of the East Sea (Sea of Japan). The ARs surveyed were 4 types. By type, Big bunk steel reef was most stable, while new unevenness reef was most vulnerable.
강원도에 시설된(2000-2005년) 일반적인 4가지 종류의 인공어초에 관한 보존상태
김완기(Wan-Ki Kim),이지현(Ji-Hyun Lee),김대권(Dai-Kweon Kim),조규태(Qtae Jo),윤장택(Jang-Taek Yoon),공용근(Yong-Gun Gong),전찬길(Chan-Kil Chun) 한국마린엔지니어링학회 2008 한국마린엔지니어링학회 학술대회 논문집 Vol.2008 No.-
Stability and durability of the artificial reefs (ARs) for wildstock enhancement have been a key issue. We surveyed the stability of artificial reefs installed at Gangeung sites along the Cangwon coast of the East Sea (Sea of Japan). The ARs surveyed were 4 types. By type, Big bunk steel reef was most stable, while new unevenness reef was most vulnerable.
비스페놀 A형 에폭시수지 혼입 폴리머 시멘트 모르터의 강도특성 및 자기수복기능 검토
김완기(Kim Wan-Ki) 대한건축학회 2004 大韓建築學會論文集 : 構造系 Vol.20 No.11
Concrete materials present unresolved durability issues. Life cycle costs are high and damage can be unsightly and unpredictable. If it is developed any smart cement composites which can self-repair internal cracks due to mechanical loading, the durability of concrete materials are remarkably improved. The purpose of this study is to ascertain self-rehabilitation function of epoxy-modified mortars without hardener. The epoxy-modified mortars without hardener are prepared with various polymer-cement ratios, subjected to different curing conditions, and tested for flexural and compressive strengths. And then, the epoxy-modified mortars without hardener in standard cure are evaluated the self-rehabilitation function through strength test after preloading at a 90 percentage of maximum compressive load.<br/> As a result, the strengths of epoxy-modified mortars without hardener are remarkably improved at the range of 5 to 15% of polymer cement ratios in comparison with unmodified mortar. Among 3types of the curing conditions, the standard cure are recommended as a optimal curing condition of the epoxy-modified mortars. The strength of epoxy-modified mortars without hardener are improved because of the self-rehabilitation function of cracks during curing after preloading. Accordingly, it is considered that the epoxy-modified mortars without hardener may be used as intelligent materials in repair work for deteriorated reinforced concrete structures.
VA/E/MMA 터폴리머 분말수지를 이용한 폴리머 시멘트 모르타르의 특성
김완기(Kim Wan-Ki) 대한건축학회 2010 大韓建築學會論文集 : 構造系 Vol.26 No.7
In general, the prepackaged-type polymer-modified mortar products are made using copolymer powders or terpolymer powders. The products of polymer-modified mortars with the former are made considerably clear as popular construction materials. While those of the polymer-modified mortars with the latter are hardly clarified owing to a relatively short history of their use. Nowadays, various redispersible polymer powders have been commercialized to manufacture construction materials in the form of prepackaged-type products, which have rapidly been developed for lack of skilled workmen in construction sites. In recent years, the terpolymer powders of improved quality have been developed and commercialized as cement modifiers. However, the properties of polymer-modified mortars using terpolymer powders have not been studied till now. The purpose of this study is to evaluate the quality of polymer-modified mortars using a VA/E/MMA powder in comparison with polymer-modified mortars using VAE-1 and VAE-2 powders. Polymer-modified mortars using commercial terpolymer powders and a SBR latex as controls are prepared with various polymer-cement ratios, and tested for strengths, water absorption, chloride ion penetration, and carbonation. On the whole, the properties of VA/E/MMA terpolymer powder-modified mortars are considerably higher than those of VAE copolymer powder-modified mortars, and are remarkably improved over unmodified mortar. It is concluded from the test results that the modification of cement mortar with the VA/E/MMA terpolymer powder causes marked improvements in its properties like the SBR latex.