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    Author(s): Mark A. Dietenberger
    Date: 2006
    Source: Proceedings of the conference on recent advances in flame retardancy of polymeric materials : volume XVII, applications research and industrial development markets. Norwalk, CT : BCC Research, c2006: ISBN: 1596232218: 9781596232211: pages 13-24.
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (178 KB)

    Description

    Our analytical model of fire growth for the ASTM E 84 tunnel, which simultaneously predicts heat release rate, flame-over area, and pyrolysis area as functions of time for constant conditions, was documented in the 2001 BCC Symposium for different treated wood materials. The model was extended to predict ignition and fire growth on exterior fire-resistive structures and ornamental vegetation for an efficient assessment of fire hazard in the wildland-urban interface. The improved model accommodates the following changing conditions: (1) transient variation of imposed heat fluxes in pyrolysis and flame-over regions, (2) non-linearity in flame-over lengths, (3) transient changes in environmental conditions, and (4) transition in flame spreading from thermally thick to thin behavior. Re-validation of the updated model with an ISO 9705 room-burn series that contained upward fire spread data is in process and will be presented at the proceedings. Cone calorimeter data for fire-resistive materials such as redwood, fire- resistant-treated plywood, and single-layer stucco-coated oriented strandboard were used in the validation work. Burning characteristics of Class B brand used in the ASTM E 108 test were also determined in a specialized cone calorimeter test to help guide model development.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Dietenberger, Mark A. 2006. Analytical modeling of fire growth on fire-resistive wood-based materials with changing conditions. Proceedings of the conference on recent advances in flame retardancy of polymeric materials : volume XVII, applications research and industrial development markets. Norwalk, CT : BCC Research, c2006: ISBN: 1596232218: 9781596232211: pages 13-24.

    Keywords

    Calorimetry, fire models, flame spread, fire testing, pyrolysis, fireproofing of wood, thermal properties, heat flux, cone calorimetry, fire hazard, ignition temperature, treated wood, fire resistance, tests, thermal degradation, ASTM E108, ASTM E84, flammability, heat release rate

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