• Proceedings of the Korean Reliability Society Conference
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• 2002.06a
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• pp.115-115
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• 2002

최근 중장비용 도료의 외관 즉 색상 및 광택의 변화는 상품가치를 결정하는 중요한 요소의 하나로 대두되고 있다. 이와 관련 도장 품질향상을 위해서 각종의 신도료가 개발되고 있고 물성 확인은 필수적이다. 특히 검사 항목중 내후성 확인은 Field에서 2년 이상 장시간의 시험기간이 필요하나 검증기간 단축을 위해 시험실에서 Weathering test를 시행하고 있다. 그러나 이러한 Lab. test 결과와 실제 Field data와의 상관관계를 알 수 없어 추정에 그치는 것이 현실이었다. 본 연구에서는 중장비용 우레탄도료의 내후성에 영향을 미치는 인자를 고려, 물성을 대폭 향상시킨 도료에 대해 시험실 Weathering test 결과와 옥외폭로시험 결과, 실제 장비에 적용한 Data를 토대로 중장비용 우레탄 도료의 내후성시험 가속계수를 도출하여 개발도료의 내후성 검증기간을 단축하고자 하였다.

• Proceedings of the KSR Conference
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• 2004.10a
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• pp.1014-1020
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• 2004

In this study, durability of the nano-level inorganic polymer based coatings which can provide a barrier against the ingress of moisture or aggressive ions to concrete is discussed. For the durability evaluation of the coatings, chloride penetration test, accelerating carbonation test, freezing and thawing test, and sulfate ponding test are conducted. As the result of this study, concrete applied nano-level inorganic polymer based coatings has a much higher resistance to the ingress of chloride ion, carbon dioxide, moisture and aggressive acid than plain concrete and epoxy resin based paint by means of crosslinking three-dimensional structure with concrete structure.

• Journal of Korean Association for Spatial Structures
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• v.17 no.1
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• pp.41-47
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• 2017

Structures of steel frame buildings getting vary depending on the development of construction technology. Fire-resistant steel beams and Columns accredited by accreditation bodies from the performance of various fire-resistant coating is applied to the current pillar method is most H-beams. H-beam has been proposed a non-load test specifications in the relevant regulations, its scope of accreditation to be granted without limitation of size H-beams from the performance of the test specification. However, in the case of the rectangular steel structure is to check its performance and to a separate one of the receive acknowledge and so take advantage of the cross-sectional shape factor in this study to test the performance of the fire-resistant structure proposed for standard test specimen.

• Journal of Ocean Engineering and Technology
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• v.11 no.3
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• pp.95-99
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• 1997

In these days, the pollution of marine environment near island at Korean coastal zone caused by the trash human waste and livestocks excreata become intensified. One of the most economic and efficient way to prevent this pollution problem is to set up island circulating incineration system. In this paper, the result of feasibility study on the application of turtle boat hull form to the incinerating vessel has been summarized especially for the resistance and course keeping point of view.

• Journal of Powder Materials
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• v.10 no.6
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• pp.415-421
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• 2003

The study for producing the flake powders by milling of aluminum foil and gas atomized powders was carried out. The effects of lifter bars on the ball motions and milling of aluminum foils were also investigated. The aluminum foils were laminated each other, elongated, fragmented into small foils and finally formed into the flake powders during the dry ball-milling. The spherical atomized-powders were milled to coarse flake powders with high aspect ratio and then changed to fine flake powders with lower aspect ratio. Even though long times were required for making flake powders by milling of foils, the water covering areas of them were higher than those of powders milled using gas-atomized powders, suggesting aluminum foils were more plastically deformed by micro-forging. On the other hand, as the number of lifter bars increased, the necessary rotation speeds of milling jar for cascading mode and cataracting mode decreased drastically. It was possible to achieve same quality of milled flake powder by using the lifter bars under the lower milling speeds. The painting test showed that the appearance of painted surface was good and optimum content range of aluminum paste in car paint to maximize the degree of gloss was 3-5%.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2012.10a
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• pp.594-596
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• 2012

Currently, demands for outdoor broadcasts and concerts are increasing. Due to severe circumstance of outdoor places like rain, wet-damage in moved loudspeaker may occur. Experimental approaches to improve waterproof-effect for movable loud speaker have been investigated in this studies. For performance test of loud speaker, enclosures were made by MDF(Medium Density Fiberboard). Three types of finishing material, general paint, sheet paper and FRP(Fiber Reinforced Plastics) are proposed for comparing waterproof-effects.

• Journal of the Korea Institute of Building Construction
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• v.14 no.3
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• pp.259-265
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• 2014

This study is to analyze durability of water-repellent paints mixed with water-repellents as outer surface finishing materials, and evaluate its feasibility. General functions and water-repelling effects were tested, and the feasibility was evaluated based on the test results. The experimental results of heat conduction durability, air permeability, absorption, and bond strength suggested that water-repellent paints mixed with water-repellents were suitable for finishing materials. Considering overall general durability performances, stable mixing ratios were 2, 5, and 8%.

• KIEAE Journal
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• v.2 no.3
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• pp.55-62
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• 2002

While cognition about an environment pollution becomes important recently, the intense pollution measures about an indoor air environment is required. In the case of building indoor environment, over 80% of modem people is living in building and these days an interest of building interior materials which becomes a reason for indoor environmental pollution in public house, office, is increasing. An experimental measurement method of this study is as follows. (1) American EPA TO-17, ASTMD5116-97, measurement method in VOCs experiment of Japanese closet industrial association (2) 2.4-DNPH cartridge method in HCHO experiment, based on American EPA TO-11 and measurement method of Japanese closet industrial association (3) standard compound is analyzed by using HPLC after solvent extraction process (4) paint and furniture are selected as measurement objects (5) we also made small chamber to grasp an emission characteristic of HCHO and VOCs and to get an environment-amicable forecast model through it, then we developed the model which can forecast emission rate by chamber experiment.

• Fire Protection Technology
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• s.14
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• pp.18-33
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• 1993

This report is announced about thermal lag of painted heat detectors. Thermal lag is forecast result from painting the part of heat receiving. It is delayed responsive time to assume fire fighting, escape. Test is simulated that heat detector is painted by synthetic resin emulsion paint according to the circumstance of installation. Painting method, number, thick etc is determined by research worker based on the popular idea.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2022.11a
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• pp.201-202
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• 2022

In this study, the high performance silicone was developed to assure the inter-layer joint in apartment house. The tensile strength, the elongation, the bond strength and the fatigue tests were conducted. As a result, it was confirmed that the performance of high -performance silicone was superior to the existing elastic paint. Therefore, it is expected that it will help to secure the quality of inter-layer joints in apartment houses.