Combustion Properties of Wood Treated with Chemicals in the Cone Calorimeter.

Harada, Toshiro; Uesugi, Saburou

doi:10.5990/jwpa.22.262

Cited by 4 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the case of phosphorous and nitrogen chemicals, the required amount of chemicals is 70-100 kg/m 3 to meet the criteria for fi re retardant material and 150-200 kg/m 3 for quasi-noncombustible material, according to the Building Standard Law of Japan. 1 However, because the FRC for wood is water soluble, there is a concern that the fi re performance of FRT wood is degraded in exterior applications.…”

Section: Introductionmentioning

confidence: 99%

Weatherability and combustibility of fire-retardant-impregnated wood after accelerated weathering tests

et al. 2009

View full text Add to dashboard Cite

The weatherability and combustibility of fi reretardant-impregnated wood during accelerated weathering for up to 2000 h were evaluated. The ability of coating to retain fi re-retardant chemicals against leaching was also examined using four coating systems (water-borne or solvent-borne, pigmented or clear, fi lm-forming or penetrating). Furthermore, the distribution of fi re retardants in the specimens was observed by scanning electron microscopy in combination with energy dispersive analysis of Xrays (SEM-EDX). The fi re performance of the specimens during weathering depended on the chemical retention, and was maintained at a quasi-noncombustible material level if the chemical retention was above 150 kg/m 3 . The maximum duration of accelerated weathering to keep this retention was 250 h for the uncoated specimens, but increased to over 1000 h for pigmented coatings. SEM-EDX revealed that the fi re retardants were accumulated in the cell lumina throughout the wood tissues. However, in the uncoated samples, the leaching of fi re retardants occurred for surfaces exposed to light and water, and was observed down to a depth of ∼150 μm after 500 h. The leaching depth extended throughout the specimen after 1000 h. In contrast, the fi re retardants still remained in samples fi nished with a solvent-borne pigmented penetrating coating even after 1000 h due to their relatively high chemical retention.

show abstract

Section: Introductionmentioning

confidence: 99%

Weatherability and combustibility of fire-retardant-impregnated wood after accelerated weathering tests

et al. 2009

View full text Add to dashboard Cite

show abstract

“…Previous studies [12][13][14][15] reported that the time to ignition of sawn lumber in the cone calorimeter test was correlated with the apparent density. Although the apparent density of DLPW was 703-707 kg/m 3 which was similar to that of PB (648-725 kg/m 3 ), the time to ignition of DLPW was 20-22 s and was earlier than that of PB (33-43 s).…”

Section: Time To Ignitionmentioning

confidence: 99%

“…The tendency was the same as for sawn lumber. 15 The heat release rate of the wood-based boards underwent the following changes. The first peak value appeared just after the time to ignition, but the heat release rate gradually decreased as the charred layer grew, and then The relationships between the total heat release values for 5 min (during the periods of 0-5, 5-10 and 10-15 min) and the surface densities are plotted in Fig.…”

Section: Time To Ignitionmentioning

confidence: 99%

Fire resistance of thick wood-based boards

2006

View full text Add to dashboard Cite

Thick wood-based boards are used as construction materials for walls and floors in Japan. In this study, fire resistance tests (ISO 834-1) and cone calorimeter tests (ISO 5660-1) were conducted for thick plywood, particleboard, and medium density fiberboard with sample thicknesses of about 28-30 mm, and their suitabilities for quasi-fireproof or fire-preventive structures were evaluated. In the ISO 834-1 fire resistance test, the heat-shielding performance (insulation criterion) for walls was evaluated and the results showed that the larger the apparent density of a woodbased board, the higher its insulation performance. The insulation performance of thick wood-based boards in the fire resistance test could be forecast from the results of the cone calorimeter test, especially when the second peak of heat release rate appeared. In the cone calorimeter tests, the surface layer density of the plywood, particleboard, and medium density fiberboard was the dominant parameter for the time to ignition and initial heat release rate. These results indicate that thick wood-based board is a suitable fire-preventive construction material.

show abstract