Bamboo and wood materials have the characteristics of low carbon and high strength, making them the best building material for building green buildings. Compared to traditional building materials, the easy to burn characteristic has become an obstacle to the promotion and widespread application of bamboo and wood materials, so it is urgent to study their combustion characteristics. This article investigated the combustion characteristics of engineered bamboo at different heat fluxes, taking into account the smoldering and self-extinction characteristics through cone calorimeter experiments. The combustion performance, mass loss rate, heat release rate, etc. were studied, and the self-extinction phenomenon of the specimens was explored. The results indicated that the direction of heating had a certain impact on the combustion characteristics of glued laminated bamboo (LBL), and the fire resistance of parallel strand bamboo (PSB) was better than that of LBL. When the heat flux exceeded 50 kW/m, the color of the flame on the surface of the specimen would change from bright yellow to strong orange, which is an important sign that the flame will self-extinguish. The self-extinction of flames at different heat fluxes was caused by insufficient supply of combustible gas generated by bamboo pyrolysis, with slightly different specific reasons. The multi-layer structure of glued laminated bamboo also makes it more difficult to self-extinguish than PSB, cross-laminated timber (CLT), and solid wood is the most prone to self-extinguish. The impact of adhesive layer delamination was not considered in this experiment, and further research is needed.

中文翻译：

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考虑阴燃和自熄的工程竹燃烧特性实验研究


竹木材料具有低碳、高强度的特点，使其成为建设绿色建筑的最佳建筑材料。与传统建筑材料相比，易燃烧的特性成为竹木材料推广和广泛应用的障碍，因此迫切需要研究其燃烧特性。本文研究了工程竹在不同热通量下的燃烧特性，并通过锥形量热仪实验考虑了阴燃和自熄特性。研究了试件的燃烧性能、质量损失率、放热率等，并探讨了试件的自熄现象。结果表明,加热方向对胶合竹(LBL)的燃烧特性有一定影响,且平行股竹(PSB)的耐火性能优于LBL。当热通量超过50kW/m时，试样表面的火焰颜色会从鲜黄色变为浓橙色，这是火焰将自熄的重要标志。不同热通量下火焰自熄的原因是竹子热解产生的可燃气体供应不足，具体原因略有不同。胶合竹的多层结构也使其比PSB、交叉层压木材（CLT）更难自熄，而实木最容易自熄。本实验未考虑胶层分层的影响，有待进一步研究。