Experimental investigation on the fire performance of wood bio-concrete using Cone Calorimeter

IF 3.4 3区 工程技术 Q2 ENGINEERING, CIVIL
Amanda L.D. Aguiar , Bruno M.C. Gomes , Monique A.F.R. Nascimento , Alexandre Landesmann , Romildo D. Toledo Filho
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Abstract

Nowadays, wood bio-concrete (WBC) can be seen as an alternative to reduce environmental impacts of the construction industry. The behavior of this material under fire conditions, however, is still poorly understood. In this sense, this work aims to investigate the behavior of wood bio-concrete under fire conditions. In this study, the wood shavings content varied from 40 to 90 %. A Mass Loss Cone Calorimeter with an incident heat flux of 50 kW/m2 was used to analyze the combustion and reaction to fire of WBCs. Then, properties such as heat release rate, total heat released, total mass loss, mass loss rate, effective heat of combustion, time to ignition and temperature of ignition were evaluated. Thermogravimetric analysis (TG) and scanning electron microscopy (SEM) were used to better explain the results from the Cone Calorimeter tests. The results showed that the cementitious matrix promoted the protection of the wood and no ignition was observed for the materials studied, excepted when 90 % of shavings were used. The lower the density of the bio-concrete, the higher the values of combustion properties. This study confirmed that, under high heat flux conditions, most of the WBCs did not exhibit characteristics that promote ignition or flame propagation.

使用锥形量热计对木质生物混凝土的防火性能进行实验研究
如今,木质生物混凝土(WBC)已被视为减少建筑业对环境影响的一种替代材料。然而,人们对这种材料在火灾条件下的行为仍然知之甚少。因此,本研究旨在探讨木质生物混凝土在火灾条件下的行为。在这项研究中,木屑的含量从 40% 到 90% 不等。使用入射热通量为 50 kW/m2 的质量损失锥形量热仪分析木质生物混凝土的燃烧和火灾反应。然后,对热释放率、总热释放量、总质量损失、质量损失率、有效燃烧热、点火时间和点火温度等特性进行了评估。热重分析(TG)和扫描电子显微镜(SEM)被用来更好地解释锥形量热计测试的结果。结果表明,水泥基质促进了对木材的保护,除使用 90% 的刨花外,所研究的材料均未观察到着火现象。生物混凝土的密度越低,燃烧性能值越高。这项研究证实,在高热通量条件下,大多数 WBC 不会表现出促进点燃或火焰传播的特性。
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来源期刊
Fire Safety Journal
Fire Safety Journal 工程技术-材料科学:综合
CiteScore
5.70
自引率
9.70%
发文量
153
审稿时长
60 days
期刊介绍: Fire Safety Journal is the leading publication dealing with all aspects of fire safety engineering. Its scope is purposefully wide, as it is deemed important to encourage papers from all sources within this multidisciplinary subject, thus providing a forum for its further development as a distinct engineering discipline. This is an essential step towards gaining a status equal to that enjoyed by the other engineering disciplines.
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