A Study on the Necessity of Complex Hazard Assessment for Combustion Products of Wood-Based Building Materials

Kim, Nam-Kyun; Kang, Yoonsoon; Rie, Dong-Ho

doi:10.9798/kosham.2017.17.5.173

Cited by 1 publication

(1 citation statement)

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“…In the case of wood particles (EG 0 wt.%), the average time to inactivity was 5.8 min, which does not meet the required standard. In the case where the expanded graphite was 30 wt.% of composite material, the time to inactivity apparently increased because the burned mass was smaller compared to that observed for wood particles, thus reducing the generated amount of harmful gases such as CO and CO2 [27]. Moreover, the ISO 1182, ISO 5660-1 standards for fire retardant material for evaluating flame retardation in case of the expandable graphite composite material are shown in Table3.…”

Section: Thermal Characteristics Of Expandable Graphite Compositesmentioning

confidence: 99%

Thermal Characteristics of Expandable Graphite–Wood Particle Composites

2020

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According to the Fire Statistics Yearbook of the National Fire Agency of the Republic of Korea, the total number of fires in 2018 was 42,338, which resulted in 2500 victims and amounted to property damages of approximately 560 billion KRW. The number of fires in buildings where wood was used as a finishing material was 28,013 (66%) in that period. To minimize human and property damage, composite materials were prepared by mixing wood particles with expandable graphite. The physical and thermal properties of the composite materials were investigated. It was observed that the expansion rate increased by 341.7% according to the expandable graphite content. Additionally, the total heat released and the thermal conductivity decreased from 38.63 to 2.5 MJ/m2 and from 24.62 to 7.8 W/m·K. The time to inactivity of white mouse in the smoke toxicity test was 14.9 min and exceeded the toxicity standard for flame retardant performance. The expandable graphite added to composite materials adopted worm-like shapes as a result of combustion, and it formed a fine lattice layer structure with 16–22 μm gaps that could reduce thermal conductivity. In addition, we can minimize the damage to people and property in the event of a fire.

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Section: Thermal Characteristics Of Expandable Graphite Compositesmentioning

confidence: 99%