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부착방지 택코트 적용에 따른 아스팔트 포장 역학적 특성 평가
임치수,정홍기,장대성,박진후,이재준 한국도로학회 2017 한국도로학회논문집 Vol.19 No.2
PURPOSES:The purpose of this paper is to evaluate interface performance while using various tack coat materials for asphalt overlay.METHODS:The evaluation was conducted with tracking test, permeability, and interface bond strength. Tracking test was conducted using an image processing technique, to investigate the susceptibility of the tack coat materials. BBS and pull-off test were conducted to evaluate bond strength. The permeability test was conducted to evaluate the effect of tack coat materials.RESULTS :Results reveal that the trackless tack coat material demonstrates less tracking compared to other materials. Moreover, both BBS and pull-off tests can effectively evaluate the bond strength at the interface. RSC-4 was measured less bond strength. Moreover, tack coat prevents water penetration through the surface and aids the extension of the surface life of asphalt pavement.CONCLUSIONS :Trackless tack coat demonstrated a high and consistent bond strength performance. The tack coat types demonstrate marginally different performance as function of curing times. Field applicability was tested based on visual observation. Therefore, these should be considered when trackless tack coat is slightly enhanced the pavement performance based on limited this study results. Finally, it is necessary to allow reasonable time for the tack coat to completely cure.
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열전모듈을 이용한 도로 공간에서의 에너지 하베스팅 기초연구
임치수,임재규,이재준 한국도로학회 2015 한국도로학회 학술발표회 논문집 Vol.2015 No.3
최근 에너지 생산에 대한 환경적인 문제가 중요한 해결 과제로 대두 되면서, 친환경적인 에너지 생산의 중요성이 강조되고 있다. 그 중 에너지원으로 이용이 가능한 풍력, 태양열, 조력 등은 일상생활에서 쉽게 발견 할 수 있는 에너지원의 대표적인 예 이다. 특히 온도차를 전기에너지로 변환 시키는 열전효과를 이 용한 에너지 하베스팅의 경우 향후 발전 가능성이 매우 높아 자동차, 의료기기, 무선 네트워크 등 첨단산 업 분야에서 관심도가 높아지고 있지만 토목·건축 분야에 있어서는 낮은 변환효율 때문에 관심도가 높지 않은 상황이다. 그러나 토목분야에서 적용시킬 수 있는 태양열을 이용한 에너지 하베스팅은 반 영구적 이 라는 특성이 있기 때문에, 발전효율을 증가시킨다면, 경제적인 측면에서 매우 효율적일 것이다. 따라서 본 연구에서는 콘크리트 구조물의 적용되는 열전모듈의 온·냉열부 온도차를 증가시키는 방법으로, 동일조 건 하에서 열전도율이 높은 알루미늄 재질의 판을 두께에 따라 열전모듈의 온·냉열부에 압착시키는 방법 과 서로 다른 재질을 이용한 케이싱을 설치하여 발전효율을 비교 하는 방향으로 연구를 진행·분석하였다.
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탄소섬유 쉬트를 활용한 도로 결빙방지 시스템 개발을 위한 기초연구
임치수,박광필,이재준,이병석 한국도로학회 2016 한국도로학회논문집 Vol.18 No.3
PURPOSES : This paper aims to develop a road pavement de-icing system using carbon sheet to replace the older snow de-icing method. Carbon sheet is a light and high-strength metal. Hence, various bodies of research for its applications in many industries have progressed. METHODS : The experiment was conducted in a laboratory. The carbon sheet supplied voltage through a power supply system, and produced heat transfers to the concrete surface. Various factors, such as pavement material, carbon sheet width, penetration depth, and freezingthawing resistance, were considered in the conducted experiments to confirm the heating transfer efficiency of the carbon sheet. RESULTS : The carbon sheet used was a conductor. Therefore, it produced heat if voltage was supplied. The exposed carbon sheet on the atmosphere did not affect the carbon sheet width when it provided constant voltage. However, the sheet showed different heating behaviors by width change when the carbon sheet penetrated into the concrete. Moreover, the freezing-thawing resistance was decreased by the carbon sheet with increasing width. CONCLUSIONS : The experiments confirmed the possibility of developing a road snow melting system using a carbon sheet. The antiicing system using the carbon sheet to replace the traditional anti-icing system has disadvantages of environmental pollution risk and electric leakage. The pavement also improved its toughness resistance. The utilization value will be very high in the future if carbon sheet heat loss can be minimized and durability is improved.
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WIM 센서 설치에 적합한 실런트 개발을 위한 기초적인 연구
임치수,김두병,김용주,이강훈,이재준 한국도로학회 2017 한국도로학회논문집 Vol.19 No.2
PURPOSES :This study aims to develop a sealant for use in the installation of Weigh-In-Motion (WIM) sensor for asphalt concrete or cement concrete pavements.METHODS:In order to investigate the properties of various sealants that were mixed with latex and carbon fiber, various test methods were adopted, such as bituminous bond strength test, softening point test, and cone penetration test. To evaluate moisture susceptibility, the BBS test was conducted under moist condition. The bond strength ratio (BSR) was calculated based on tensile strength ratio method.RESULTS :The sealant’s properties significantly varied according to the amount of latex or carbon fiber. The usage of latex marginally enhanced the cone penetration test result, notwithstanding reduced asphalt content. This implies that the sealant will be proper cold temperature reason. Moreover, the addition of latex and carbon fiber evidently increased the softening point. This indicates that the tendency of the material to flow at elevated temperatures is encountered during service. With the addition of latex and carbon fiber, the moisture susceptibility measured with BSR improved marginally, while the bond strength under dry condition decreased marginally. Sealant F displays the highest bond strength and BSR under limited test conditions.CONCLUSIONS :According to the proportion of latex and carbon fiber mixed, properties of sealant, such as softening point, cone penetration, and BSR varied marginally. This indicates that the sealant has to be applied considering the environmental condition, to improve service life.
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임치수(Lim, Chisu),이재준(Lee, Jaejun) 한국도로학회 2015 한국도로학회논문집 Vol.17 No.5
PURPOSES : The purpose of this paper is to investigate the application of thermoelectric technology to concrete structures for harvesting solar energy that would otherwise be wasted. In various fields of research, thermoelectric technology using a thermoelectric module is being investigated for utilizing solar energy. METHODS: In our experiment, a halogen lamp was used to produce heat energy instead of the solar heat. A data logger was used to record the generated voltage over time from the thermoelectric module mounted on a concrete specimen. In order to increase the efficiency of energy harvesting, various factors such as color, architecture, and the ability to prevent heat absorption by the concrete surface were investigated for the placement of the thermoelectric module. RESULTS : The thermoelectric module produced a voltage using the temperature difference between the lower and upper sides of the module. When the concrete specimen was coated with an aluminum foil, a high electric power was measured. In addition, for the power generated at low temperatures, it was confirmed that the voltage was generated steadily. CONCLUSIONS: Thermoelectric technology for energy harvesting can be applied to concrete structures for generating electric power. The generated electricity can be used to power sensors used in structure monitoring in the future.
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탄소섬유 쉬트를 활용한 도로 결빙방지 시스템 개발을 위한 기초연구
임치수,박광필,이재준,이병석 한국도로학회 2016 한국도로학회논문집 Vol.18 No.3
PURPOSES : This paper aims to develop a road pavement de-icing system using carbon sheet to replace the older snow de-icing method. Carbon sheet is a light and high-strength metal. Hence, various bodies of research for its applications in many industries have progressed. METHODS : The experiment was conducted in a laboratory. The carbon sheet supplied voltage through a power supply system, and produced heat transfers to the concrete surface. Various factors, such as pavement material, carbon sheet width, penetration depth, and freezingthawing resistance, were considered in the conducted experiments to confirm the heating transfer efficiency of the carbon sheet. RESULTS : The carbon sheet used was a conductor. Therefore, it produced heat if voltage was supplied. The exposed carbon sheet on the atmosphere did not affect the carbon sheet width when it provided constant voltage. However, the sheet showed different heating behaviors by width change when the carbon sheet penetrated into the concrete. Moreover, the freezing-thawing resistance was decreased by the carbon sheet with increasing width. CONCLUSIONS : The experiments confirmed the possibility of developing a road snow melting system using a carbon sheet. The antiicing system using the carbon sheet to replace the traditional anti-icing system has disadvantages of environmental pollution risk and electric leakage. The pavement also improved its toughness resistance. The utilization value will be very high in the future if carbon sheet heat loss can be minimized and durability is improved.
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