摘要
采用热重法研究了基质沥青和Mg(OH)2阻燃沥青的燃烧特性。实验发现:为了保证沥青的低温抗裂性能,Mg(OH)2添加比例不宜超过25%;添加Mg(OH)2后沥青的阻燃性能明显提高,其燃烧的挥发分析出阶段的峰值温度推后49℃,随后的胶质分解阶段和沥青质残炭燃烧阶段也均被延迟;通过Guass分峰验证了Mg(OH)2的阻燃机理为其分解反应产生的吸热、稀释和阻隔等物理作用。
Combustion characteristics of bitumen and bitumen with Mg（OH）2 were studied by thermo gravimetric analysis. It was shown that, in order to ensure the low-temperature crack- ing resistance of bitumen, the addition ratio of Mg（OH）2 should not exceed 25% ; the thermal stability of bitumen is im- proved by mixing Mg（OH）2 ： the peak temperature of the stage of oil content release was postponed by 49 C, and the tempera ture of stage of resins pyrolysis and stage of asphaltenes/char combustion were also delayed; by Gauss peak fitting of DTG curves, the flame retardant mechanism of Mg（OH）2 can be concluded as the cooling, dilution, and blocking effects from Mg（OH）2 thermal decomposition.
出处
《消防科学与技术》
CAS
北大核心
2013年第11期1263-1266,共4页
Fire Science and Technology
关键词
沥青
MG(OH)2
阻燃
热重分析
燃烧特性
bitumen
Mg（OH）2
flame-retardant
thermo grav imetric analysis
combustion characteristics
