Research of various fire-retardant treated wood species

Abstract

The study presents a review of the published data on the construction wood species and fire retardant coatings for wood. Fire properties of the wood are discussed. The wood chosen for the research is spruce and pine for their incidence in wood constructions production. In observance of the manufacturer’s instructions on the product’s spread rate, certified fire retardant agents (BAK-1 and Flamasepas 2) have been applied using a brush onto both wood species. The specimens have also been treated with flame retardant agents using the spread rates that are less and more than the spread rate given in the manufacturer’s instruction (40 %, 60 %, 80 % and 120 % of the declared spread rate). Tests have been conducted in accordance with LST EN ISO 1716 standard that is used for determination of the combustion class „Reaction to fire tests for building products. Determination of the heat of combustion“. The paper describes the procedure for sample preparation and testing. The results of fire-retardant treated and non-treated wood tests and the problems of sampling are discussed in the study. The graphs of dependency of the residue (salts) and relative calorific values on the percentage of the declared spread rate are presented and discussed. At the end of the paper the conclusions are provided.