用于可持续建筑的橡胶和塑料生态集料的热分析和防火性能量化

IF 2 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Yohannes Werkina Shewalul, Natalia Flores Quiroz, Richard Walls
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引用次数: 0

摘要

在可持续建筑的推动下,各种产品被引入以促进回收利用,但它们的特性与火灾行为的关系往往是未知的。本文对橡胶屑和塑料生态骨料RESIN8的防火性能进行了评价。进行了各种测试,包括锥量热计、热重分析(TGA)和差示扫描量热法(DSC)。这些都辅以数值计算和Coats-Redfern动力学模型来量化这些材料的热性能和防火性能。锥形量热计在35和50 kW m - 2下进行了测试,而临界热流密度(CHF)值是使用一系列辐照水平确定的。对着火时间(TTI)、热释放率(HRR)、峰值热释放率(pHRR)和热火灾危险参数进行了量化。这两种材料都属于高热火灾危险类。CR的热分解速率峰值出现在365°C(单峰),RESIN8的热分解速率峰值出现在435°C和550°C(双峰)。在第一阶段和第二阶段,橡胶屑的活化能分别为66.7 kJ mol−1,树脂8的活化能分别为55.1 kJ mol−1和43.9 kJ mol−1。这些生态聚集体在回收过程中和之后的回收设施中,以及在散装储存和在建筑系统中大量使用时,可能造成严重的热火灾危险。从消防安全的角度来看,进一步的调查对于理解将这些生态骨料纳入砖石和混凝土系统的影响至关重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Thermal Analysis and Fire Property Quantification of Crumb Rubber and Plastic Eco-Aggregates for Sustainable Construction

Thermal Analysis and Fire Property Quantification of Crumb Rubber and Plastic Eco-Aggregates for Sustainable Construction

With a drive for sustainable construction, various products are being introduced to promote recycling, but often their properties relation to behaviour in fire are not known. In this paper, the fire performance of crumb rubber and a plastic eco-aggregate, called RESIN8, were assessed. Various tests, including cone calorimeter, thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC), were conducted. These are supplemented by numerical calculations and the Coats–Redfern kinetic model to quantify the thermal and fire properties of these materials. Cone calorimeter tests were conducted at 35 and 50 kW m−2, while the critical heat flux (CHF) values were determined using a range of irradiance levels. Time to ignition (TTI), heat release rate (HRR), peak heat release rate (pHRR), and thermal fire hazard parameters were quantified. Both materials were classified under the high thermal fire hazard class. The peak thermal decomposition rates occurred at 365°C (single peak) for CR and at 435°C and 550°C (two peaks) for RESIN8. The calculated activation energy values were 66.7 kJ mol−1 for crumb rubber and 55.1 and 43.9 kJ mol−1 for RESIN8 in the first and second stages, respectively. These eco-aggregates could pose a significant thermal fire hazard, in the recycling facility during and after the recycling process, as well as when stored in bulk and when incorporated in large quantities in construction systems. Further investigation is crucial for understanding the effect of incorporating these eco-aggregates within masonry and concrete systems from a fire safety perspective.

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来源期刊
Fire and Materials
Fire and Materials 工程技术-材料科学:综合
CiteScore
4.60
自引率
5.30%
发文量
72
审稿时长
3 months
期刊介绍: Fire and Materials is an international journal for scientific and technological communications directed at the fire properties of materials and the products into which they are made. This covers all aspects of the polymer field and the end uses where polymers find application; the important developments in the fields of natural products - wood and cellulosics; non-polymeric materials - metals and ceramics; as well as the chemistry and industrial applications of fire retardant chemicals. Contributions will be particularly welcomed on heat release; properties of combustion products - smoke opacity, toxicity and corrosivity; modelling and testing.
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