A Study on Burning Characteristics and Influencing Factors of Building Decorative Materials with a Cone Calorimeter

• Main Authors: Jae-lian Chain, 陳佳玲
• Other Authors: Yu-Pei Ke
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/74082330149328987291

碩士 === 國立高雄第一科技大學 === 營建工程所 === 98 === To determine the fire resistance rating, the cone calorimeter method is often applied. Since January 18, 2007, the Bureau of Standards, Metrology and Inspection (BSMI) under the Ministry of Economic Affairs has revised standard CNS14705 “Method of test for heat release rate for building materials - cone calorimeter method”, and will make it the exclusive method for testing the fire resistance of construction materials countrywide from September 1, 2011. This shows the much more importance of the test method. At present, the testing database of construction materials using the cone calorimeter is established. However, according to the standard, the specimens should be cured under certain temperature and humidity to reach a steady weight before testing. Though this curing process can lead to a stable data, however, for the initial conditions may not be the same as those on the real fire scene, which the materials are long exposed to the high temperature and humidity environment of Taiwan, the fire load and the heat release rate tested may not reveal the real behaviors. In addition, because surface materials are often applied on the construction materials for decoration, the fire characteristics may also be affected. Based on the above assumptions, this study is carried out to validate the current standard. On the first stage, plywood is used as the base material. The Taguchi method is applied with the thickness, surface materials, the initial temperature, and the initial humidity as the control factors. From the results, it is found that the surface materials is the most dominant factor. Improper surface treatment will even accelerate the ignition. The thickness and the initial temperature of the specimens are secondly important. Consequently, the humidity of the specimens has less effect on the test results. On the second stage, plywood, gypsum board, and particle board are employed to further investigate the influences of the initial temperature and humidity. Based on the testing data, it can be found that the total heat release rate, the peak value of the heat release rate, and the average weight loss rate are merely affected by the initial temperature and humidity. But it also shows the high humidity of the materials will delay the ignition.