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중성화와 염해의 복합 열화 환경하의 콘크리트 내에서의 Cr강방식철근의 방식성
태성호 한국구조물진단유지관리공학회 2006 한국구조물진단유지관리공학회 논문집 Vol.10 No.3
중성화와 염해의 복합 열화 환경하의 콘크리트 내에서의 Cr강방식철근의 방식성을 평가하기 위하여 Cr함유율이 다른 10종류의 철근을 피복 두께 20mm 위치에 매입한 염화물 이온 함유량 0.3, 0.6, 1.2, 2.4kg/m3의 콘크리트 공시체를 제작하였다. 그 후 촉진 중성화 시험 및 고저온 건습 반복의 부식 촉진 시험 기간 중의 Cr강방식철근의 자연전위, 부식면적률, 부식감량률의 경시변화를 측정함으로써 각 부식 환경에 대한 Cr강방식철근의 방식성에 대하여 검토하였다. 그 결과, 중성화와 염해의 복합 열화 환경의 경우, 염화물 이온 함유량 1.2kg/m3과 2.4kg/m3에 대하여 각각 Cr함유율 7% 이상과 9% 이상의 Cr강방식철근에서 방식성이 확인되었다. Ten types of steel bars having different Cr contents were embedded in concretes with chloride ion contents of 0.3, 0.6, 1.2, and 2.4kg/m3 to fabricate specimens assuming such deteriorative environments. After being carbonated to the reinforcement level, these concretes were subjected to corrosion-accelerating cycles of heating/cooling and drying/wetting. The time-related changes in the corrosion area and corrosion loss of the Cr-bearing rebars were then measured to investigate their corrosion resistance. The results revealed that in a deteriorative environment prone to both carbonation and chloride attack, corrosion resistance was evident with a Cr content of 7% or more and 9% or more in concretes with chloride ion contents of 1.2 and 2.4kg/m3, respectively.
피복 콘크리트의 균열 발생에 기인한 매크로셀 부식 환경하에서의 Cr강방식철근의 방식성
태성호 한국구조물진단유지관리공학회 2006 한국구조물진단유지관리공학회 논문집 Vol.10 No.4
피복 콘크리트의 균열 발생에 기인한 매크로셀 부식 환경하에서의 Cr강방식철근의 방식성을 평가하기 위하여 10종류의 Cr강방식철근을 콘크리트에 매입 후 피복 콘크리트에 모사 균열을 발생시킨 공시체를 제작하였다. 그 후 염수 분무 촉진 양생 105사이클까지의 매크로셀 부식전류밀도의 경시변화와 아노드·캐소드 철근의 자연전위, 부식면적률, 부식감량률을 측정함으로써 Cr강방식철근의 방식성에 대하여 검토하였다. 그 결과, 염화물 이온 농도차 3kg/m3 이하의 매크로셀 부식 환경에 대하여 Cr함유율 9% 이상의 Cr강재에서 방식성이 확인되었으며 특히, Cr함유율 11% 이상의 Cr강재에서 뛰어난 방식성이 입증되었다. This study was investigated to corrosion resistance of Cr-bearing rebars to macrocell corrosion caused by concrete with crack. Ten types of steel bars having different Cr contents were embedded in concretes with imitation crack. The corrosion resistance of the Cr-bearing rebar was examined by measuring half-cell potential, macrocell corrosion current, corrosion area and weight loss up to 105 cycles of salt spray testing. The results revealed that the Cr content required for corrosion resistance in a macrocell corrosion environment caused by chloride ion gap of 3kg/m3 was 9% or more. The corrosion-resisting performance of Cr-bearing rebar was particularly noticeable with a Cr content of 11% or more.
Corrosion Behavior of Cr-bearing Corrosion Resistant Rebar in Concrete with Chloride Ion Content
태성호 대한건축학회 2005 Architectural research Vol.7 No.1
Conventional studies have focused on the reduction in the water-cement ratio, the use of various admixtures, etc., to ensure the durability of reinforced concrete structures against such deterioration factors as carbonation and chloride attack. However, improvement in the concrete quality alone is not considered sufficient or realistic for meeting the recent demand for a service life of over 100 years. This study intends to improve the durability of reinforced concrete structures by improvement in the reinforcing steel, which has remained untouched due to cost problems, through subtle adjustment of the steel components to keep the cost low.As a fundamental study on the performance of Cr-bearing rebars in steel reinforced concrete structures exposed to corrosive environments, The test specimens were made by installing 8 types of rebars in concretes with a chloride ion content of 0.3, 0.6, 1.2, 2.4 and 24kg/m3. Corrosion accelerated curing were then conducted with them. The corrosion resistance of Cr-bearing rebars was examined by measuring crack widths, half-cell potential, corrosion area and weight loss after 155 cycles of corrosion-accelerating curing. The results of the study showed that the corrosion resistance increased as the Cr content increased regardless of the content of chloride ions, and that the Cr-bearing rebars with a Cr content of 5% and 9% showed high corrosion resistance in concretes with a chloride ion content of 1.2 and 2.4kg/m3, respectively.
태성호,조영상,신성우,이승민,맹준호 (사)한국교육녹색환경연구원 2010 교육·녹색환경연구 Vol.9 No.2
This study purposed realization and a phase reduction of school building CO2 emissions. Accordingly selected standard school buildings and evaluated life cycle environmental load(CO2). This study proposed Green building technology which separated design sector, energy sector,afforestation sector for carbon-neutral city school buildings realization of M-city. As a result, elementary, middle and high schools of M-city built in the year 2013 were required that design sector was Energy Performance Index(EPI) 75 point and energy sector was solar installations more than 25% of the power usage, Solar systems installed more than 10% of total gas consumption and the area of afforesting more than 35% of the ecological area to achieve 30%CO2 reduction compared to the Respectively standard school buildings.
실내 환경평가의 사례분석을 통한 국내외 친환경 건축물 인증제도의 비교 분석 연구
태성호,신성우,임수철 대한건축학회 2007 대한건축학회논문집 Vol.23 No.8
Earth is being threatened by the actions of human beings, This results in a warming global climate, declining resources and general harm back to human beings and future generations. Fortunately, there have been considerable steps taken to create a more sustainable living environment today, including environmental building assessment tools. This paper is a study on the indoor environmental ratings by comparing green building certification systems, namely GBCC, CASBEE, LEED and BREEAM. Indoor environment ratings of these certification systems are compared and analyzed, to find out the whether these certification systems represent a comprehensive evaluation of a livable indoor environment.The results of the study showed that the indoor environmental rating of GBCC, CASBEE, LEED and BREEAM had some differences, and that CASBEE, LEED, and BREEAM obtained a result that was each 17%, 41%, and 54% lower than GBCC, respectively.