Standard Test Method for Determining the Combustion Behavior of Layered Assemblies using a Cone Calorimeter

Importancia y uso:

5.1 Flammable liquid products can be generated by either pyrolysis or melting of polymers. Materials that generate flammable liquid products include thermoplastic polymers (for example, polyolefins) and thermosetting polymers (for example, polyurea and flexible polyurethane), which degrade to yield, in part, liquid pyrolyzates when pyrolyzing. Such liquid material can accumulate underneath a burning item and eventually ignite to form a pool fire, generally leading to a sharp increase in heat release rate and increase in fire hazard.

5.2 Fire barriers are able to hinder the formation of a pool fire by delaying the generation and the release of flammable liquid products.

5.3 This test method is intended to simulate the combustion of a central (that is, away from the edges) cross-section of a single material or a multi-layered product with ignition occurring on the top surface of the specimen.

5.4 The test method is designed to assess whether liquid products are released during the test and the time at which they are released.

5.5 The test method is designed to assess whether dripping occurs during the test and the time at which it occurs.

5.6 The test method is designed to assess whether bottom ignition occurs during the test and the time at which it occurs.

5.7 The test method is designed to assess whether pool ignition occurs during the test and the time at which it occurs.

5.8 The test method is designed to assess whether burn-through occurs during the test and the time at which it occurs.

5.9 The test measures heat release rate, mass loss rate and the resulting smoke obscuration as a result of exposing the specimen to a radiant heat source.

5.10 The test method assesses whether the components of the specimen under examination demonstrates any of the following behaviors: breaking open, charring, appearance of superficial cracks without complete separation of the parts, melting, or shrinkage.

5.11 The test method does not assess flame spread and does not account for other factors such as aging, wear and tear of a product or vandalism.

Subcomité:

E05.21

Volúmen:

04.07

Número ICS:

13.220.50 (Fire-resistance of building materials and elements), 17.200.10 (Heat. Calorimetry)

Palabras clave:

burn-through; dripping; heat release rate; oxygen consumption calorimetry; pool fire;