EXPERIMENTAL INVESTIGATION OF THERMAL DEGRADATION FOR THREE KINDS OF WOOD

摘要

Wood is one of the largest materials used currently for house product. Thus, it is a necessity to studyrnthe thermal behavior of wood during fire. For that raison, this work aims to compare three kinds ofrnwood (one raw wood and two plywoods) with their thermal degradation data.rnWood is present under different form like raw wood or plywood. These two sorts of wood have beenrntested to determinate their general thermal behavior during fire. Tests have been conducted in a conerncalorimeter apparatus at heat fluxes from 10 to 60kW.m-2. The mass loss and the time to ignition havernbeen continuously monitored during each experiment. Moreover, the cone calorimeter has beenrncoupled with two gas analyzers (FTIR and HORIBA) in order to characterize the exhaust gasesrnemitted during the experiments.rnThis work is composed of two parts. Firstly, a comparison of the thermal behavior of the three kinds ofrnwood is led. It concerns the stages of the thermal degradation and the estimation of ignitability andrncombustibility parameters. Secondly, the comparison concerns the gases emitted during the thermalrndegradation of the two plywoods and the raw wood. Indeed, one of the major aspects of therndegradation comes from the smoke and the products of combustion. Indeed, in the past physical andrnthermal aspect have been conducted in different kinds of wood, but few on the gases emitted duringrnthe combustion whereas this aspect of the degradation represent a lot of hazards to take into account.