• Title/Summary/Keyword: Fire Properties

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An Experimental Study on the Fire Resistance and Mechanical Properties of ECC Permanent Form (ECC 영구거푸집의 내화성능 및 역학적 특성에 관한 실험적 연구)

  • Kim, Yong-Ro;Song, Young-Chan;Oh, Jae-Keun;Kim, Jae-Hwan;Kim, Ook-Jong;Lee, Do-Bum
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2009.05c
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    • pp.75-78
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    • 2009
  • It was investigated fire resistance properties and mechanical properties of high strength concrete column using ECC(Engineered Cementitious Composites) permanent form by KS F 2257 Methods of fire resistance test for elements of building construction and compression test for application of precast concrete column method of high rise building in this study. As a test result, it was appeared that ECC permanent form is available as fire resistance method of high strength concrete and new precast concrete construction method for facilitating construction of high rise building.

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Temperature on structural steelworks insulated by inorganic intumescent coating

  • Choi, J. Yoon;Choi, Sengkwan
    • Steel and Composite Structures
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    • v.15 no.1
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    • pp.1-14
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    • 2013
  • Predicting the fire resistance of structures has been significantly advanced by full scale fire tests in conjunction with improved understanding of compartmental fire. Despite the progress, application of insulation is still required to parts of structural steelwork to achieve over 60 minutes of fire rating. It is now recognised that uncertainties on insulation properties hinder adaptation of performance based designs for different types of structures. Intumescent coating has recently appeared to be one of most popular insulation types for steel structures, but its design method remains to be confirmed by empirical data, as technical difficulties on the determination of the material properties at elevated temperatures exist. These need to take into account of further physiochemical transitions such as moving boundary and endothermic reaction. The impetus for this research is to investigate the applicability of the conventional differential equation solution which examines the temperature rise on coated steel members by an inorganic intumescent coating, provided that the temperature-dependent thermal/mechanical insulation properties are experimentally defined in lab scale tests.

A Study on Enhancing Institutionalization of the Fire Proofing and the Safety Management for Architectural Buildings as Cultural Properties (문화재 건축물의 화재예방 및 안전관리 제도개선 방안 연구)

  • Yi, Waon-Ho;Park, Byung-Cheol;Kim, Hee-Kyu;Park, Sang-Hyun;Lee, Jung-Han
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
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    • 2008.04a
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    • pp.325-328
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    • 2008
  • The fire ravage of Sungnyemun in 10th Feb 2008 gave an opportunity to overview an existing management system regarding cultural assets, which have been out of disaster and safety management. According to this consideration, we could provide enhanced plans of safety management policy with regard to cultural properties. The incident has taught us the important experiences in terms of the safety management in normal and the cultural assets; moreover, we should do our best through dispassionate reflection and consistent efforts to inherit priceless cultural assets to the next generation.

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Mechanical and Electrical Properties of Overhead Conductor due to Forest Fire (산불에 노출된 가공송전선의 기계적 및 전기적 특성 거동)

  • Kim, Byung-Geol;Jang, Young-Ho;Kim, Shang-Shu;Han, Se-Won
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.21 no.11
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    • pp.1042-1048
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    • 2008
  • Forest Fire can cause a serious damage to overhead conductors. Therefore, the detailed investigation for the changes of mechanical and electrical properties of damaged conductors should be carried out to understand the effect of forest fires on conductors. This is very much important to maintain transmission line safely. Especially, this paper describes the changes of mechanical and electrical properties of flame exposed conductor. Overhead conductors temperature were almostly 55$\sim$65% of ambient temperature. Tensile Strength decreased according to incerase of Forest Fire temperature. The detailed will be given in the text.

Interrelationships of Fire and Explosion Properties for Chlorinated Hydrocarbons (염화탄화수소의 화재 및 폭발 특성치 간의 상관관계)

  • Ha, Dong-Myeong
    • Journal of the Korean Society of Safety
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    • v.17 no.4
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    • pp.126-132
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    • 2002
  • By using the reference data, the empirical equations which describe the interrelationships of explosion properties and physical properties of n-chlorinated hydrocarbons have been derived. The properties which have been correlated are the lower and upper explosive limits, the stoichiometric coefficients, the heats of combustion, the carbon numbers. Also, the new equations using the mathematical and statistical methods for predicting the temperature dependence of lower explosive limits(LEL) of chlorinated hydrocarbons on the basis of the literature data are proposed. The fire and explosion properties calculated by the proposed equations in this research were a good agrement with literature data within a few A.A.P.E.(Average Absolute Percent Error) and A.A.D.(Average Absolute Deviation.) From a given explosive properties, by using the proposed equations, it is possible to predict to the fire and explosion characteristics for the other chlorinated hydrocarbons.

Evaluation of Fire Performance for High Strength Concrete Mock-up Column with Fiber by Unloaded Fire Test (비재하 내화시험에 의한 섬유혼입 고강도 콘크리트 Mock-up 기둥의 내화성능 평가)

  • Song, Young-Chan;Kim, Yong-Ro;Kim, Ook-Jong;Lee, Do-Bum
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2009.11a
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    • pp.97-100
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    • 2009
  • Fire resistance properties and mechanical properties of high strength concrete mock-up column using organic fiber by KS F 2257 Methods of fire resistance test for elements of building construction and compression test was investigated for application of precast concrete column method of high rise building in this study. As a test result, it was appeared that ECC permanent form is available as fire resistance method of high strength concrete and new precast concrete construction method for facilitating construction of high rise building.

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The Improvements for Fire Retardancy and Radiation Resistance of Chloroprene Rubber (클로로프렌 고무의 난연성 및 내방사선 특성 향상)

  • Kim, Ki-Yup;Lee, Chung;Ryu, Boo-Hyung
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.17 no.11
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    • pp.1205-1211
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    • 2004
  • This study has investigated radiation degradation of chloroprene rubber in the presence of some fire retardant. Ammonium polyphosphate, aluminium trihydroxide, magnesium hydroxide, calcium carbonate and antimony trioxide were selected as flame retardant. Samples were irradiated using a Co$^{60}$ ${\gamma}$ -ray and ray up to 2000 kGy at a dose rate of 5 kGy/hr in the presence of air atmosphere at room temperature. After irradiation, samples were assessed fire retardancy with electrical properties and mechanical properties. Some considerations concerning the effects of the fire retardants added to chloroprene rubber on the radiation and thermal stability of chloroprene rubber are presented. From fire retardancy with electrical and mechanical property measurements, it was found that addition of magnesium hydroxide resulted in maximum fire retardant effect.

A Study on the Mechanical Properties of Concrete with Aggregate Type (골재 종류에 따른 콘크리트의 고온역학적 특성에 관한 연구)

  • Yoon, Dae-Ki;Kim, Gyu-Yong;Lee, Tae-Gyu;Choe, Gyeong-Choel;Koo, Kyung-Mo;Nam, Jeong-Soo
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2012.05a
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    • pp.63-64
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    • 2012
  • In case of concrete, it should be deformed by many factors, such as explosive spalling, thermal strain and creep at high temperature. Structural fire design has been proposed to predict fire damage as national standard. It is general safer to use values obtained from tests of unstressed residual test in stead of stressed test. But most of thermal properties on concrete were conducted with normal aggregate. In this study, it evaluated mechanical properties of concrete with aggregate type and loading condition. we use normal and light aggregate to have different thermal properties. Also, we test mechanical properties to use Ø100×200 mm cylinder specimen according to target temperature and 0%, 20%, 40% loading.

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