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摘要
聚苯乙烯板作为建筑外墙外保温系统的核心材料,发生火灾时火焰蔓延速度快,容易产生大量有毒烟气,影响建筑火灾安全。以α石膏和粉煤灰作为自流平砂浆基材,加入不同掺量的氢氧化镁阻燃剂,研究自流平饰面防火聚苯乙烯板的烟气产生规律。结果表明,涂覆自流平砂浆的聚苯乙烯板燃烧级别均能到达V-0级,平均烟密度最大值比聚苯乙板低4～13倍,烟密度峰值到达时间延长60～120s,并有效降低CO的浓度;氢氧化镁的加入可以降低饰面层中产生的SO2浓度,随着氢氧化镁含量的增加,饰面层阻燃和抑烟效果更佳;水胶比为0.30,砂胶比为0.50,粉煤灰取代率为30%,减水剂掺量为0.2%,氢氧化镁掺量为10%的饰面层阻燃和抑烟性能最好。
Abstract
Polystyrene(PS) board is the core material of building exterior insulation system.When fire occurs,the flame spreads quickly,and it is easy to produce a large amount of toxic fumes,which affected the fire safety of building.Gypsum and fly ash were used as self-leveling mortar base materials,and different amounts of magnesium hydroxide flame retardant were added to study the smoke generation law of self-leveling fireproof PS board.The results shown that the burning grade of PS board coated with self-leveling mortar can reach V-0 level,the average smoke density was 4～13 times lower than that of PS board,and the peak value of smoke density was extended by 60～120s,and effectively reduced the concentration of CO,magnesium hydroxide can reduce the surface layer of SO2 concentration.With the increase of magnesium hydroxide content,the flame retardant and smoke suppression effect of the veneer layer was better.The water-to-binder ratio was 0.30,the sand-to-binder ratio was 0.50,and the fly ash substitution rate was 30%.The decorative layer with a water reducing agent content of 0.2% and a magnesium hydroxide content of 10% had the best flame retardant and smoke suppressing properties.
关键词
聚苯乙烯板
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火灾安全
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烟气规律
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烟密度
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阻燃性能
Key words
polystyrene board
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fire safety
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smoke law
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smoke density
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flame retardant
自流平饰面防火聚苯乙烯板烟气产生规律研究[J].
化工新型材料, 2020, 48(7): 184-187 DOI:10.19817/j.cnki.issn 1006-3536.2020.07.042
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基金资助
国家重点研发计划(2018YFC0807900);教育部长江学者和创新团队发展计划项目(IRT0618)
