• KIEAE Journal
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• v.7 no.4
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• pp.119-126
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• 2007

In this study, we processed two procedures of application test of filler for fire-resistance utility that are new application methods of aerated concrete and properties test of aerated concrete according to mixing ratio because we investigated the better use of aerated concrete as filler for fireproof safety and we proposed basic data about standardization of mixing of aerated concrete. We measured flow and volume change of aerated concrete. And if its volume doesn't change, we added measuring unit weight and compressive strength. To test application of aerated concrete as filler for fireproof safety, we filled up aerated concrete to fireproof safety according to suitable mixing ratio. Then we measured maximum temperature of inner part of fireproof safety in accordance with the standard test of fireproof. According to the results, aerated concrete as filler for fireproof safety could be possibly used. So when we make aerated concrete, we should consider using an adding agent as well as a foaming agent.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2017.05a
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• pp.176-177
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• 2017

IN order to use it for high-temperature fire, Fireproof boards mainly composed of Ca and Mg used. Korea does not have a fireproof board for explosive high temperatuer fire in tunnel, and it is applying existing fireproof coating. However, when a high-temperature fire(1350℃)with explosion occurs, it can not sustain its strength and can not be destroyed to have fire resistance. Each year, more than 100,100tons of wastes are produced by using Ca as an oyster shell. In this study, we try to determine whether or not to reuse the heat-heated fireproof board.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2013.11a
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• pp.104-105
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• 2013

The buildings constructed with steel structure is coated with certified fire resistive material to resist from fire. Coating materials lose their initial performances as time passes, so they need some maintenance. Fireproof spray-application also loses its performance and this performance loss of thr fireproof spray-application is very important because fire resistance of buildings depends on fireproof spray-application. So this study is to develop Acceleration durability test method of Fireproof spray-application, and use the Certification of fire resistant coating system.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2004.05a
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• pp.45-50
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• 2004

In this study, we processed two procedures of application test of filler for special-purpose utility that are new application methods of aerated concrete and properties test of aerated concrete according to mixing ratio because we investigated the better use of aerated concrete as filler for fireproof safety and we proposed basic data about standardization of mixing of aerated concrete. We measured flow and volume change of aerated concrete. And if its volume doesn't change, we added measuring unit weight and compressive strength. To test application of aerated concrete as filler for fireproof safety, we filled up aerated concrete to fireproof safety according to suitable mixing ratio. Then we measured maximum temperature of inner part of fireproof safety in accordance with the standard test of fireproof. According to the results, aerated concrete as filler for fireproof safety could be possibly used. So when we make aerated concrete, we should consider using an adding agent as well as a foaming agent.

• Journal of Korean Tunnelling and Underground Space Association
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• v.22 no.6
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• pp.669-680
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• 2020

In Korea, fireproof performance is evaluated through a series of fire-resistance tests for important structures, and the performance standard follows the guidelines suggested by ITA. The fireproof duct slab manufactured by combining the slab and the fireproof material with a precast method is effective in that it can eliminate the construction time of the fireproof material. In this study, a series of fire resistance tests was performed on the fire test specimens under the RWS fire scenario in order to secure the fire resistance performance of the precast fireproof duct slab. As a result of the test, it was found that the fireproof performance was secured when the thickness of the fireproof material was 30 mm or more. In both fireproof materials and concrete, the rate of temperature change initially increased, then decreased, and then increased again, and the temperature at the inflection point was measured as 110℃ for all fireproof materials and concrete. It is judged that this occurs when the C-S-H (CaO-SiO₂-H₂O) generated by the hydration reaction in both the fireproof material and concrete is dehydrated.

• Fire Science and Engineering
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• v.27 no.4
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• pp.35-40
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• 2013

This study investigated the evacuation characteristics of student of elementary school with single unit fireproof shutter. In particular, we gathered the data about fireproof shutter and checked the data. And we made comparison and did an analysis of the evacuation characteristics of elementary school student according to working of single unit fireproof shutter for fires. As a result, it took the last occupant 130 seconds to escape from the school with no fire shutter case. But it took time 190 seconds to escape when the single unit fireproof shutter worked. Some of elementary school students could not open the door installed on the shutter when the single unit fireproof shutter worked. Considering this circumstance, it can be led to time delays of escaping when the single unit fireproof shutter work. And many students can be exposed to the fire hazards. Therefore, the study on the power to open the door installed on the shutter must be done in the future.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2015.11a
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• pp.126-127
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• 2015

Because of the high-rise and bigger building structure, high strength concrete's demand was increased. However, chemicophysical property of concrete is changed by high temperature. Therefore, this study evaluated on spalling properties of 80MPa high strength concrete with fireproof coating. The result, when complex fireproof coating spread on concrete, it has good fire safety that was thinner than single fireproof coating spread on concrete.

• Journal of the Korea Institute of Building Construction
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• v.16 no.3
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• pp.193-199
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• 2016

This study is a research about performance of fireproof board using industrial waste such as oyster shell and dry process bottom ash through the heating test and conclusions were obtained as follows. Test samples show back side temperatures as follows : in $300^{\circ}C$, $103.1{\sim}125.1^{\circ}C$, in $600^{\circ}C$, $201.1{\sim}210.1^{\circ}C$, in $900^{\circ}C$, $249.2{\sim}276.9^{\circ}C$. In the test, temperature increases of specimens of fireproof board are kept at certain temperatures hence it could be concluded that the specimens withstand high temperatures. According to the test, it could be concluded that fireproof board made by smaller particles shows better performance up to $600^{\circ}C$ while at higher temperatures, fireproof board made by bigger particles shows better performance. It is estimated that fireproof board made by particles of bigger size has more pore structure and it delays heat conduction.

• Journal of the Architectural Institute of Korea Structure & Construction
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• v.35 no.11
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• pp.137-146
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• 2019

Recently, the Near-Surface-Mounting method using Fiber reinforced polymer (FRP) has been developed and applied to the reinforcement of many concrete structural members. However, as a part of the fire resistance design, there is a lack of research related to fire insulation for the areas reinforced with FRP. In case of NSM reinforcement, there is a difference in the transferred temperature from the external surface to the groove corresponding to the location of the groove where the FRP is embedded, and the effect of this should be reflected in the fireproof insulation design. Therefore, in this study, after forming grooves for surface embedding in concrete blocks, fireproof insulation reinforcement was performed using Calcium Silicate (CS) fireproof board and an experiment to evaluate the temperature transfer was performed. By observing the temperature at these groove positions, the reduction of temperature transfer according to fireproof insulation detail was studied. As a result, when the NSM-FRP is properly fire-insulated using the CS-based fireproof board, the epoxy inside the groove does not reach its glass transition temperature until the external temperature reaches $800^{\circ}C$.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2008.04a
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• pp.353-356
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• 2008

Recently, high-rise buildings have been increased with the development of economy in domestic, and theses fire riskiness has been brought up. However, fireproof design standards is not enough. So, this study was to make a comparative study on the fire resistance design standards of building in domestic and foreign. As a results, it is necessary that fireproof design standards is revised.