温拌阻燃沥青阻燃机理的红外和热重差热分析  

Infrared and thermogravimetric analysis of flame retardant mechanism for warm-mix flame retardant asphalt

作　　者：刘卫东 刘圣洁 王海名 林钰 LIU Weidong;LIU Shengjie;WANG Haiming;LIN Yu(Guangxi Key Laboratory of Road Structure and Materials,Guangxi Transportation Science and Technology Co.,Ltd.,Nanning,Guangxi 530007,China;Research and Development Center on Technologies,Materials and Equipment of Highway Construction and Maintenance Ministry of Transport,Guangxi Transportation Science and Technology Co.,Ltd.,Nanning,Guangxi 530007,China;College of Civil and Transportation Engineering,Hohai University,Nanjing,Jiangsu 210098,China)

机构地区：[1]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 [2]广西交科集团有限公司高等级公路建设与养护技术、材料及装备交通运输行业研发中心,广西南宁530007 [3]河海大学土木与交通学院,江苏南京210098

出　　处：《江苏大学学报（自然科学版）》2024年第2期242-248,共7页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51908194);中国博士后科学基金资助项目(2019M650101);广西重点研发计划项目(桂科AB20297033);江西省科技厅重点研发项目(20192BBG70080)。

摘　　要：采用Sasobit温拌剂、氢氧化铝(ATH)、有机蒙脱土(OMMT)和基质沥青制备复合温拌阻燃沥青,通过傅里叶红外光谱(FTIR)扫描、热重分析法(TG)和差热分析法(DSC)等微观测试方法,研究了温拌剂和阻燃剂的协调增效作用和阻燃机理.结果表明:温拌剂和阻燃剂对基质沥青的改性作用以物理改性为主;阻燃剂的加入使得沥青热稳定性和阻燃、抑烟能力增强,且阻燃和抑烟效果会随着复合阻燃剂掺量的增加而提升;阻燃剂在沥青表面形成隔离层,具有裹附效果,有效地降低沥青燃烧的热流率,表现出良好的阻燃效果和燃烧控制效应;ATH和OMMT两种阻燃剂复配后具有协同阻燃作用,其阻燃机理主要为中断热交换阻燃机理和凝聚相阻燃机理两个方面;当复合阻燃剂掺量为8%时,沥青具有良好的阻燃和抑烟性能以及经济性.The warm-mix flame retardant composite modified asphalt was prepared with warm-mix agent(Sasobit),aluminum hydroxide(ATH),organic montmorillonite(OMMT)and base asphalt,and fourier transform infrared(FTIR)scanning,thermogravimetric(TG)analysis and differential scanning calorimetry were used to investigate the coordination and synergistic effect of warm-mix agent and flame retardant and the flame retardant mechanism.The results show that the modification effect of warm-mix agent and flame retardant on the base asphalt is mainly physical modification.The addition of flame retardant can improve the thermal stability,flame retardant and smoke suppression effects of asphalt,and the flame retardant,smoke suppression effects are improved with the increasing of the amount of flame retardant.The flame retardant can form barrier coating on the asphalt surface with wrapping effect,which can effectively reduce the heat flow rate with excellent flame retardant efficiency and combustion process control ability.The compounded flame retardants of ATH and OMMT can provide the synergistic flame retardant effect,and the flame retardant mechanisms are mainly heat exchange interruption and condensed phase flame retardant.When the compounded flame retardant content is 8%,the asphalt has good flame retardant and smoke suppression properties with good economy.

关 键 词：温拌阻燃沥青 阻燃机理 红外光谱分析法 热重分析法 差热分析法 

分 类 号：U414[交通运输工程—道路与铁道工程]