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광합성 남세균을 도포한 투수 콘크리트의 이산화탄소 고정에 의한 물성 변화
장인동,이남곤,박정준,곽종원,문훈 한국건설순환자원학회 2023 한국건설순환자원학회 논문집 Vol.11 No.4
Concrete emits a large amount of carbon dioxide throughout its life cycle, and due to the societal demand for carbon dioxide reduction, research on storing carbon dioxide in concrete in the form of minerals is ongoing. In this study, cyanobacteria, which absorb carbon dioxide through photosynthesis and fix it as calcium carbonate, were applied to a porous concrete substrate, and the changes in the properties of the concrete substrate due to their special environmental curing condition were analyzed. The results showed that the calcium carbonate precipitation by the microorganisms was concentrated in the light-exposed surface area, and most of the precipitation occurred in the cement paste part, not in the aggregate. This microbially induced calcium carbonate precipitation enhanced the mechanical performance of the paste and improved the overall compressive strength as the curing age progressed. In addition, the increase in microbial biofilm and calcium carbonate improved the pore structure, which influenced the reduction in water permeability.
장인동,이경호,이동호,김우식,박한준 한국항공우주학회 2013 한국항공우주학회 학술발표회 논문집 Vol.2013 No.11
무장헬기 사격통제시스템의 개념에 기초하여 시현기 타입의 훈련 시스템 프로토타입을 개발하였다. 제안된 시스템은 사격 통제 시스템의 효율적인 훈련이 가능하고 내장형 소프트웨어로 구현하였다. 본 논문에서 제안한 훈련모드는 추가적인 하드웨어 없이 저비용으로 훈련을 극대화할 수 있다. The prototype of display type training system was developed based on the definition of Fire Control System(FCS) in armed helicopter. Efficient FCS training can be possibile with this training system. Training system consits of emedded software. The proposed training mode can maximize train efficiency at a low cost without additional hardware.
장인동,이동호,박한준 한국항공우주학회 2013 한국항공우주학회 학술발표회 논문집 Vol.2013 No.4
무장시스템의 개념을 정의한 뒤 무장시스템의 기능 및 성능 검증을 위한 무장시스템 System Integration Laboratory(SIL)을 제안한다. 무장시스템 SIL은 실제 상황과 유사한 전장상황 모의와 무장 시스템의 하부 장비간 연동 데이터 모니터링을 통해 무장시스템의 기능을 검증할 수 있다. The definition of weapon system was defined, then Weapon System(WS) SIL(System Integration Laboratory) to verify performance and functions of WS was proposed. The proposed WS SIL can verify performance of WS through simulation of a battlefield situations and real-time monitoring of interface between subequipments of the weapon system.
장인동,박한준 한국항공우주학회 2014 한국항공우주학회 학술발표회 논문집 Vol.2014 No.4
무장헬기의 사격통제시스템의 개념을 정의한 뒤 전장시에 사격통제시스템 운용의 효율성 증대를 위한 데이터링크 메시지를 제안한다. 또한, 국내외 헬기들의 사격통제시스템을 위한 데이터링크 전송 사례를 통해 국내 무장헬기 개발시 필요한 데이터링크 메시지를 고찰한다. The definition of fire control system installed at armed helicopter was defined, then data-link message to increase efficiency of operation of a fire control system was proposed. In this paper, examples of other helicopters were introduced and data-link messages for the development of armed helicopter were reviewed.
Micro-CT 활용 콘크리트 내 철근 早식 정량을 위한 실험적 연구
장인동 ( Jang In-dong ),이종구 ( Yi Chong-ku ) 한국건축시공학회 2019 한국건축시공학회 학술발표대회 논문집 Vol.19 No.1
Corrosion of rebars in reinforced concrete structures is a major factor that shortens the life of the structure. As corrosion progresses, the adhesion between the concrete tissues and the rebar decreases and the cracks in the concrete due to the expansion of the oxide intensify. Although it is necessary to measure corrosion behavior of rebars inside the concrete to measure degradation of structures due to rebar corrosion, no studies have been conducted to measure corrosion of rebars in In-situ state. In this study, corrosion of rebars in reinforced concrete specimens was attempted to be quantified using micro-computer tomography. Since corrosion of concrete takes several months per 10mm of cover, accelerated corrosion techniques were applied. Accelerated corrosion on the specimen was conducted by applying a 10 V magnetic field to the buried rebar and external electrodes with the specimen submerged in a 10% calcium chloride solution. The experiment found that within two weeks, more than 40% of rebar reduction occurred, and the cracks in the radial cracks occurred through the concrete structure, leading to the transfer of the oxide produced through the cracks to the surface of the specimen.