Combustion performance of engineered bamboo from cone calorimeter tests
Combustion performance of engineered bamboo from cone calorimeter tests
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DOI：
10.1007/s00107-016-1074-6
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发表时间：
2017-03-01
影响因子：
2.6
通讯作者：
Li, Xiangmin
中科院分区：
文献类型：
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作者：
Xu, Qingfeng;Chen, Lingzhu;Li, Xiangmin
通过锥形量热计在25、50和75 kW/m三种热流密度下进行的燃烧和炭化性能测试，研究了两种用于结构应用的工程竹子：层压竹片和竹片的燃烧和炭化性能。试验采用垂直于入射热通量和平行于入射热通量两种方式进行。计算了两种工程竹材的可燃性和可燃性参数，并对其着火时间、放热率和质量损失率、比熄灭面积、有效燃烧热、一氧化碳和二氧化碳产率进行了比较。根据对木材的观察，将热流密度为50 kW/m(2)、暴露时间为30-60 min的锥形量热计试验所测得的平均炭化率作为标准炉试验的等效炭化率，并与欧洲和澳大利亚标准颁布的等效炭化率进行了比较。竹材的密度几乎是层压竹子的两倍，在所有参数中都表现出优越的防火性能，接近典型硬木的性能。晶粒的取向对竹材的炭化性能的影响可以忽略不计，而对于竹材，晶粒垂直于入射热通量时的炭化速率略小于晶粒平行于入射热通量时的炭化速率。最后，本研究证明了相对便宜的锥形量热计测试的实用性，用于快速评估竹子的燃烧性能，特别是炭化性能。
The combustion and charring properties of two types of engineered bamboo for structural applications: laminated bamboo sheets and bamboo scrimber were investigated through cone calorimeter tests conducted at three levels of heat flux, 25, 50 and 75 kW/m(2). The test was conducted with the grain both perpendicular and parallel to incident heat flux. The ignitability and combustibility parameters of these two types of engineered bamboo were calculated and the time to ignition, heat release and mass loss rates, specific extinction area, effective heat of combustion, and carbon monoxide and carbon dioxide yield were compared. Based on observations for timber, the average measured charring rates from the cone calorimeter tests at a heat flux of 50 kW/m(2) and exposure time of 30-60 min were taken as equivalent charring rates for standard furnace tests and compared with those promulgated by European and Australian standards. Bamboo scrimber, having a density almost twice that of laminated bamboo, demonstrated superior fire performance in all parameters considered and approached the performance of a representative hardwood. The orientation of the grain was observed to have negligible influence on their charring performance for laminated bamboo, while for bamboo scrimber, the charring rate when the grain was perpendicular to the incident heat flux was slightly smaller than when the grain was parallel to incident heat flux. Finally, this study demonstrates the utility of the relatively inexpensive cone calorimeter test, for the rapid assessment of combustion and particularly charring performance of bamboo.