• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2011.11a
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• pp.498-501
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• 2011

본 연구에서는 방염제가 적용되는 방염대상물에 대한 검정기술기준과 목조문화재에 적용되는 방염제의 검정기준의 차이에 대해 비교하여 보았으며 이를 통해 단청 등이 도색되어 있는 대부분의 목조문화재에 적용되는 방염제의 성능과 방염 처리되어진 일반 목재의 방염성능평가방법에 대하여 생각해 보았다. 목조문화재용 방염제 검정기준 내의 방염성 평가는 소방방재청 고시 제 2009-31호의 "방염제의 형식승인 및 검정기술기준"과 비교하였을 때 목재를 비교대상으로 할 경우 방염성능 기준 및 측정방법과 동일하거나 거의 유사하였으며 방염제의 물성 등에 대한 기본적인 평가방법 또한 동일한 것으로 나타났다. 그러나 시험시편에 대한 규정에 있어서 목조문화재용 시험편의 경우 일정 두께이하로 규정하고 있어 시험하는 시편의 두께에 따라 방염성능 평가기준에 도달하지 못하는 경우가 발생할 수 있을 것으로 판단되어진다.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2010.04a
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• pp.383-388
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• 2010

1999년 씨랜드 청소년 수련원 화재로 19명이 사망하여 샌드위치 패널의 위험성이 대두되었으며, 2008년도 이천 냉동창고 화재 그리고 최근 2009년 11월 19일에도 샌드위치 패널로 건축된 물류창고에서 화재가 발생하였다. 이러한 샌드위치 패널로 시공된 물류창고 등의 화재는 확대가 빠르므로 난연재 소재의 샌드위치 패널의 필요성에 대한 관심이 높아져 가고 있다. 따라서 본 연구에서는 폴리스티렌 폼을 심재로 한 샌드위치 패널의 장점에 난연성을 부과하여 화재 안전성을 도출하는 하고자 한다. 샌드위치 패널의 심재로 주로 사용되어지는 EPS 비드에 저가의 물유리를 코팅하여 난연성을 도출하고자 한다. 2차 발포 성형시에 물유리가 고온의 스팀에 씻겨 내려가지 않고 남아서 난연성을 나타내도록 하는 것이 목표이다.

• Structural Engineering and Mechanics
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• v.78 no.1
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• pp.67-75
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• 2021

This work studies the behaviour of a steel portal frame selection under fire exposure, considering both span lengths and fire exposure times as variables. Such structures combine carbon steel (S275), fireproof micro-alloyed steel (FR), and coatings of intumescent paint with variable thicknesses, improving thereby the flame retardant behaviour of the steel structure. Thus, the main contribution of this study is the optimization of the portal frames by combining both steels, analysing the resulting costs influence on the final dimensions. Besides, the topological optimization of each steel component within the structure is also defined, in accordance with the following variables: weather conditions, span, paint thickness, and cost of steel. The results mainly confirmed that using both FR and S275 grades with intumescent painting is the Pareto optimum when considering performance, feasibility and costs of such portal frames widely used for industrial facilities.

• Special Issue of the Society of Naval Architects of Korea
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• 2009.09a
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• pp.18-23
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• 2009

After the installation of electric cables at block, PE(pre-erection) and hull stages, the coating stains on the electric cable sheath were unavoidably occurred by additional painting process. According to class rules paint or coating applied on the electric cables shall not adversely affect the mechanical, chemical of fire resistant characteristics of the electric cable sheath. However, there has not been quantitatively studied about the effect of coating stains on properties of sheath materials. In this study, we tried to investigate the effect of coating stains on the performance and deterioration of sheath materials by using FTIR, SEM analysis, flame retardant, high potential voltage and tensile test. The results sowed that coating stains, which were occurred during painting work on site could not adversely affect on the performance and deterioration of sheath materials.

• Journal of the Korea Institute of Building Construction
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• v.18 no.6
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• pp.559-567
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• 2018

In the case of fire, surface treatment agents used in external insulation finishing methods are substances that are vulnerable to fire due to thin finishes and the combustion of polymers. In this study, it was expected that the performance of surface preparation mortars could be improved by using expandable graphite with excellent thermal performance. Experimental results showed that the mechanical properties of surface preparation mortar were improved by using the fly ash and silica fume. Surface treatment materials using expanded graphite have a characteristic of expanding when a fire occurs. It has been shown that heat-swellable surface treatment materials can reduce the penetration of heat sources into the surface of synthetic insulation.

• Fire Science and Engineering
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• v.34 no.1
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• pp.18-25
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• 2020

In this study, the heat release rate of pipe insulation is analyzed by considering the installation status in accordance with the standards ISO 20632 and NFPA 274. The flame retardation rate was evaluated for six types of test samples: polyethylene foam covered with beaten silver (PE(S)), PE foam tapped (PE(N)), elastomeric closed cell thermal insulation (rubber), Japanese PE foam (PE(J)), Japanese polyurethane foam (PU(J)), and Japanese styro form (ST(J)) by EN 13501-1 and fire growth curve. The results show that PU(J), PE(J), and PE(N) were Class E and ultra-fast, NFPA 274 test standards for Class D and Fast, and PE(S) by ISO 20632 were Class C and Slow, and Rubber and ST(J) were Classes and Low. However, the changes in the time-averaged maximum heat release rate for each test standard (ISO 20632 and NFPA 274) to evaluate the flame retardation rate differed among identical materials. This means that the fundamental study is necessary to analyze the more accurate reasons.

• Fire Science and Engineering
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• v.26 no.3
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• pp.106-111
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• 2012

In this study, EIFS (Exterior insulation finish system) of exterior cladding was applied Cone calorimeter test to confirm the effect of flame retardant. As a results, the initial ignition points in accordance with the coated form and concentration of the flame retardant was delayed. But flame resistant treatment of EIFS cladding to control the fire will not affect confirmed that. In addition, EIFS that uses high-density and low-density due to difference in the density of the impact of the fire was no difference. The exterior of the ignition experiment occurred before and after 40 seconds, heat release rate to 100 seconds appears to occur about 90 % compared with the other exterior wall materials, the initial fire spread very fast was confirmed. EIFS cladding in order to prevent the spread of fire in the application of EIFS legally use is limited by the use of the building. And flame spread can be prevented, such as a vertical outer wall compartment measures are urgently needed.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2009.04a
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• pp.229-234
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• 2009

본 연구에서는 친환경 인테리어용으로 개발된 벽포지에 대해 방염성능이 시험되었다. 실제로 방염성능은 "45$^{\circ}$ 연소시험" 및 "접염시험", 그리고 "연기밀도시험"에 의해서 수행되었다. 벽포지의 주성분이 고온에서 쉽게 용융하는 PET(폴리에스터) 이다. PET의 이런 물성으로 인하여 "45$^{\circ}$ 연소시험"과 "연기밀도시험"의 요구조건들은 쉽게 만족시킬 수 있었지만, 용융 물품에 대해 추가로 요구되는 "접염시험"은 통과하기 어려웠다. 총 47종 109점에 대해 방염성능시험을 수행한 결과 18종 54점이 요구조건을 만족하였다. 일반적으로 보드에 배접된 상태로 시공되는 모듈의 난연성능을 개선하기 위해서는 벽포지의 방염성능뿐만 아니라 보드, 접착제 등의 특성에 관한 보다 많은 연구가 필요하다.

• Fire Science and Engineering
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• v.29 no.6
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• pp.84-90
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• 2015

Multi-layered material (sandwich panel) consists of double-sided steel plate which is incombustible material or similar material and core material which is not incombustible material. In case of sandwich panel which uses combustible material as insulation, flames spread inside the steel plate at the time of fire so that it is difficult to extinguish fire from the outside and flames spread rapidly and may cause the building to collapse. The current Building Act requires the sandwich panel to secure fire-retardant performance according to the purpose and size of building. In this study, the fire spreading prevention structure applied to partial exterior walls was applied to multi-layered material and its effect was measured through full scale fire test and the possibility to secure fire safety of buildings by applying the fire spreading prevention structure to multi-layered material in future was presented.

• Composites Research
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• v.34 no.1
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• pp.57-62
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• 2021

As interest in the eco-friendly ships and lightweight equipment is increasing in the shipbuilding and marine industry, composite materials are applied to equipment such as pipes. In this study, a basalt fiber reinforced furan composite (BFC), an eco-friendly material, was manufactured to apply the pipe insulation cover that requires environment-friendly and heat/flame retardant performance. An optimization study of post-curing conditions of BFC was conducted, and experiments and analysis were performed on mechanical strength, heat/flame retardant properties, and affinity properties. Finally, as a result of the study BFC material is proved to be a good candidate to apply pipe insulation cover.