Effect of the substrate on the results of the fire tests of thin layers of floor, wall, and ceiling coverings

Olavi Keski-Rahkonen

Research output: Book/ReportReport

Abstract

In the fire tests of many building materials a thin sheet of the sample is mounted on a thicker substrate. The thermal properties of the substrate could have a considerable effect on the heating of a thin slab. This changes the ignition time, burning rate and other measured quantities, and could influence the conclusions from the fire test. Results from a simple linearized heat conduction model are reviewed and used to delineate regions in terms of Fourier and Biot numbers where that effect should be considered while designing fire tests for thin samples. The effective heat transfer coefficient is determined by an asymptotic approach devised here. Experimental evidence supports this linearized theory for steel plates on wooden substrates. CEN/TC127/WG1 has proposed standard substrates for the fire tests of surface products. These substrates should represent and cover well common usage. These theoretical and experimental results are used to make a new proposal for standard substrates for CEN/TC127/WG1.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages51
ISBN (Print)951-38-4229
Publication statusPublished - 1992
MoE publication typeNot Eligible

Publication series

SeriesVTT Publications
Number111
ISSN1235-0621

Fingerprint

Roof coverings
Ceilings
Fires
Substrates
Heat conduction
Heat transfer coefficients
Ignition
Thermodynamic properties
Heating
Steel

Keywords

  • fire ignition
  • fire tests
  • thin films
  • coatings
  • substrates
  • floor coverings
  • burning rate
  • fire protection
  • fire safety
  • surface finishing
  • utilization
  • ceiling materials
  • wall materials
  • thermal resistance
  • standards
  • construction materials
  • steel industry
  • heat transfer
  • CEN
  • wooden structures

Cite this

Keski-Rahkonen, O. (1992). Effect of the substrate on the results of the fire tests of thin layers of floor, wall, and ceiling coverings. Espoo: VTT Technical Research Centre of Finland. VTT Publications, No. 111
Keski-Rahkonen, Olavi. / Effect of the substrate on the results of the fire tests of thin layers of floor, wall, and ceiling coverings. Espoo : VTT Technical Research Centre of Finland, 1992. 51 p. (VTT Publications; No. 111).
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abstract = "In the fire tests of many building materials a thin sheet of the sample is mounted on a thicker substrate. The thermal properties of the substrate could have a considerable effect on the heating of a thin slab. This changes the ignition time, burning rate and other measured quantities, and could influence the conclusions from the fire test. Results from a simple linearized heat conduction model are reviewed and used to delineate regions in terms of Fourier and Biot numbers where that effect should be considered while designing fire tests for thin samples. The effective heat transfer coefficient is determined by an asymptotic approach devised here. Experimental evidence supports this linearized theory for steel plates on wooden substrates. CEN/TC127/WG1 has proposed standard substrates for the fire tests of surface products. These substrates should represent and cover well common usage. These theoretical and experimental results are used to make a new proposal for standard substrates for CEN/TC127/WG1.",
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author = "Olavi Keski-Rahkonen",
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Keski-Rahkonen, O 1992, Effect of the substrate on the results of the fire tests of thin layers of floor, wall, and ceiling coverings. VTT Publications, no. 111, VTT Technical Research Centre of Finland, Espoo.

Effect of the substrate on the results of the fire tests of thin layers of floor, wall, and ceiling coverings. / Keski-Rahkonen, Olavi.

Espoo : VTT Technical Research Centre of Finland, 1992. 51 p. (VTT Publications; No. 111).

Research output: Book/ReportReport

TY - BOOK

T1 - Effect of the substrate on the results of the fire tests of thin layers of floor, wall, and ceiling coverings

AU - Keski-Rahkonen, Olavi

N1 - Project code: PAL9503

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N2 - In the fire tests of many building materials a thin sheet of the sample is mounted on a thicker substrate. The thermal properties of the substrate could have a considerable effect on the heating of a thin slab. This changes the ignition time, burning rate and other measured quantities, and could influence the conclusions from the fire test. Results from a simple linearized heat conduction model are reviewed and used to delineate regions in terms of Fourier and Biot numbers where that effect should be considered while designing fire tests for thin samples. The effective heat transfer coefficient is determined by an asymptotic approach devised here. Experimental evidence supports this linearized theory for steel plates on wooden substrates. CEN/TC127/WG1 has proposed standard substrates for the fire tests of surface products. These substrates should represent and cover well common usage. These theoretical and experimental results are used to make a new proposal for standard substrates for CEN/TC127/WG1.

AB - In the fire tests of many building materials a thin sheet of the sample is mounted on a thicker substrate. The thermal properties of the substrate could have a considerable effect on the heating of a thin slab. This changes the ignition time, burning rate and other measured quantities, and could influence the conclusions from the fire test. Results from a simple linearized heat conduction model are reviewed and used to delineate regions in terms of Fourier and Biot numbers where that effect should be considered while designing fire tests for thin samples. The effective heat transfer coefficient is determined by an asymptotic approach devised here. Experimental evidence supports this linearized theory for steel plates on wooden substrates. CEN/TC127/WG1 has proposed standard substrates for the fire tests of surface products. These substrates should represent and cover well common usage. These theoretical and experimental results are used to make a new proposal for standard substrates for CEN/TC127/WG1.

KW - fire ignition

KW - fire tests

KW - thin films

KW - coatings

KW - substrates

KW - floor coverings

KW - burning rate

KW - fire protection

KW - fire safety

KW - surface finishing

KW - utilization

KW - ceiling materials

KW - wall materials

KW - thermal resistance

KW - standards

KW - construction materials

KW - steel industry

KW - heat transfer

KW - CEN

KW - wooden structures

M3 - Report

SN - 951-38-4229

T3 - VTT Publications

BT - Effect of the substrate on the results of the fire tests of thin layers of floor, wall, and ceiling coverings

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Keski-Rahkonen O. Effect of the substrate on the results of the fire tests of thin layers of floor, wall, and ceiling coverings. Espoo: VTT Technical Research Centre of Finland, 1992. 51 p. (VTT Publications; No. 111).