EXPERIMENTAL STUDY ON SMOLDERING COMBUSTION OF CONSTRUCTION PRODUCTS

摘要

This paper deals with the phenomenon of smoldering and smoldering fire propagation in constructionrnproducts. Numerous studies on this process describe and capture the basic conditions and propagationrnbehavior of this sensitive process for various products. The repeatability of the smoldering combustionrnresults is strongly dependent on constant ambient and material conditions. Against the background ofrnthe European standard harmonization and building authority requirements, we are investigating thernsmoldering behavior of construction products. Due to the non-transferability of results from thernreaction to fire tests (acc. to EN 13501-1:2010) to the smoldering process, a new standard test methodrnis being developed. One central task of this project is to distinguish materials in an equivalent, neutralrnand objective way according to their smoldering behavior as well as to identify and define theirrnreaction to smoldering initiation. The following four stages of reaction to smoldering initiation forrnconstruction materials classified A1 to E (acc. to EN 13501-1:2010) have been identified: 1. Nornsmoldering, not self-sustaining, not progressive, instantly self-extinguishing; 2. Smoldering, not selfsustaining,rnnot progressive, delayed self-extinguishing; 3. Smoldering, self-sustaining, progressive,rnself-extinguishing; 4. Smoldering, self-sustaining, progressive, not self-extinguishing. These stages arernbased on combinations of reactions in the materials during and after an initiation and in the course of arnsmoldering combustion. The initiated smoldering combustion and the course of the smolderingrncombustion after an initiation appear to be the situation in which a material indicates how high itsrninherent potential to smolder can be. It is planned to propose the reaction stages as elements for thernidentification of smoldering behavior of construction products in the developmental work on arnharmonized European standard test.