摘要
以钛酸酯改性沥青阻燃剂BFR-Ti和阻燃增效剂硼酸锌ZB为助剂,以SBS改性沥青为母体制备隧道阻燃沥青,通过氧指数法、烟密度法、锥形量热法和热重分析等方法系统研究了BFR-Ti与ZB协同阻燃SBS改性沥青的燃烧性能,探讨了二者的协同阻燃机理。结果表明,与SBS改性沥青/BFR-Ti相比,SBS改性沥青/BFR-Ti/ZB体系的氧指数略有上升,烟密度、热释放速率(HRR)、质量损失速率(MLR)以及有效燃烧热(EHC)等指标均明显下降,实际成炭量增加;SBS改性沥青/BFR-Ti具有显著的吸热阻燃机理和凝聚相阻燃机理的特征,SBS改性沥青/BFR-Ti/ZB是以凝聚相阻燃机理为主,兼具协效阻燃和吸热阻燃机理。
Tunnel fire resistant asphalt can be prepared by mixing SBS modified asphalt and BFR-Ti/ZB.The combustion performances of the SBS modified asphalt/BFR-Ti/ZB and the synergism mechanism of the BFR-Ti and ZB are studied systematically through different methods,such as oxygen index（LOI） method,density of smoke,cone calorimetry,thermogravimetric analysis,etc.The result indicates that compared with SBS modifiedasphalt/BFR-Ti,BFR-Ti/ZB has synergistic effect which can make smoke density,heat release rate（HRR）,mass loss rate（MLR） and effective heat of combustion（EHC） of SBS modified asphalt/BFR-Ti/ZB systems significantly decrease while the oxygen index of the SBS modified asphalt/BFR-Ti/ZB and the practice carbon content increase.SBS modified asphalt/BFR-Ti system has significant endothermic-antiflaming mechanism and condensed phase flame-retardance character.SBS modified-asphalt / BFR-Ti/ZB is based on the condensed phase flame-retardance mechanism while with synergistic flame-retardance and endothermic-antiflaming mechanism.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第3期53-58,共6页
Journal of Chongqing University
基金
国家自然科学基金资助项目(50978263)
关键词
隧道
阻燃改性
沥青
硼酸锌
偶联剂
协同作用
阻燃机理
tunnel
flame-retardant modified
asphalt
zinc borate
coupling agent
synergistic effect
flame-retardant mechanism
