竹地板燃烧特性的锥形量热仪分析

Combustion Characteristics of Bamboo Floorings Determined by a Cone Calorimeter

以锥形量热仪为研究手段,对侧拼竹地板、胶合竹地板和重竹地板的燃烧特性进行了研究.结果表明,重竹地板的点燃时间最长,相对于胶合竹地板和侧拼竹地板而言分别延长了6s和12s;重竹地板的热释放速率和有效燃烧热的第二峰值相对于胶合竹地板和侧拼竹地板而言分别延迟了4min和6min;在15min前,3种竹地板的总热释放量大小依次为胶合竹地板、侧拼竹地板、重竹地板;成炭率大小依次为重竹地板、胶合竹地板、侧拼竹地板;烟比率大小依次为侧拼竹地板、胶合竹地板、重竹地板;三者的CO浓度差别不大,重竹地板的CO_2曲线第二峰出现时间分别比胶合竹地板和侧拼竹地板延长了4min和6min;重竹地板相对于胶合竹地板和侧拼竹地板而言,更有利人们在火灾场中的逃生.

The aim of this research was to analyze the combustion characteristics of flat pressed bamboo flooring, side pressed bamboo flooring and strand woven bamboo flooring commonly used for residential flooring. Experiments on the three kinds of bamboo flooring were performed using a cone calorimeter ac cording to ISO 5660-1 specifications. The results showed that time to ignition （TTTI） Of strand woven bamboo flooring was the longest, extended by 6 s and 12 s compared to side pressed bamboo flooring and flat pressed bamboo flooring, respectively. The rate of heat release （RRHR） and the second peak of effective heat of combustion （EEHC） of strand woven bamboo were deferred by 4 min and 6 min, compared to side pressed bamboo flooring and flat pressed bamboo flooring, respectively. In the first 15 min of combustion, the total heat release （TTHR）, char yield and smoke ratio （SSR） of the three types of bamboo flooring were in the order of side pressed bamboo flooring 〉 flat pressed bamboo flooring 〉 strand woven bamboo flooring, strand woven bamboo flooring 〉 side pressed bamboo flooring 〉 flat pressed bamboo flooring, and flat pressed bamboo flooring ） side pressed bamboo flooring 〉 strand woven bamboo flooring, respectively. The difference in CO concentration was non-significant, and the second peak of CO2 of strand woven bamboo flooring was deferred by 4 min and 6 rain, compared to side pressed bamboo flooring and flat pressed bamboo flooring, respectively. So strand woven bamboo flooring was conducive to fire escape, compared to side pressed bamboo flooring and flat pressed bamboo flooring.