首页|沥青复合阻燃抑烟剂的作用效果与协同机理

沥青复合阻燃抑烟剂的作用效果与协同机理

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采用氢氧化铝、有机蒙脱土与可膨胀石墨复配阻燃抑烟剂,通过极限氧指数(LOI)法、烘箱恒温加热试验、热重分析、傅里叶变换红外光谱、扫描电镜及X射线能谱分析了复合阻燃抑烟剂对沥青的作用效果与协同机理.结果表明:复配剂的加入起到明显的阻燃抑烟效果,含量为6%的复配剂可将沥青的LOI值提升至25.19%,单位沥青烟气释放量减少70%;复配剂拓宽了单一助燃剂的作用温度范围,在沥青燃烧过程中吸收热量,稀释可燃气体浓度,不仅能够提升沥青的热稳定性,还可形成复合阻隔层,起到协同阻燃抑烟作用.
Effect and Synergistic Mechanism of Composite Flame Retardant and Smoke Suppressant for Asphalt
Composite flame retardant and smoke suppressant was prepared by using aluminum hydroxide,organic montmorillonite and expandable graphite.By the limiting oxygen index(LOI)method,oven constant temperature heating,thermogravimetric analysis,Fourier infrared spectroscopy,scanning electron microscopy and X-ray energy spectrum were used to analyze the effect and synergistic mechanism of composite flame retardant and smoke suppressant for asphalt.The results show that the addition of the compound agent has obvious flame retardant and smoke suppression effect,6%of the compound agent can increase the LOI value of asphalt to 25.19%,and the unit asphalt smoke release amount is reduced by 70%.The compound agent broadens the temperature range of the single combustion promoter.It absorbs heat and dilutes the concentration of combustible gas during the combustion of asphalt.It not only improves the thermal stability of asphalt,but also forms a composite barrier layer,which plays a synergistic flame retardant and smoke suppression role.

pavement materialflame retardant and smoke suppressionsynergistic mechanismaluminum hydroxideorganic montmorilloniteexpandable graphite

李晓超、刘圣洁、曾俐豪、王海名、林钰

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河海大学 土木与交通学院,江苏 南京 210098

广西交科集团有限公司 广西道路结构与材料重点实验室,广西 南宁 530007

浙江交投高速公路运营管理有限公司,浙江 杭州 310000

路面材料 阻燃抑烟 协同机理 氢氧化铝 有机蒙脱土 可膨胀石墨

广西省重点研发计划广西省重点研发计划国家自然科学基金江西省交通厅科技项目

桂科AB20297033桂科AB23026144519081942023H0001

2024

10.3969/j.issn.1007-9629.2024.04.005

建筑材料学报
同济大学

建筑材料学报

CSTPCD北大核心
影响因子：1.046
ISSN：1007-9629
年,卷(期)：2024.27(4)
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