Infrared and thermogravimetric analysis of flame retardant mechanism for warm-mix flame retardant asphalt
LIU Weidong1,2， LIU Shengjie3， WANG Haiming3， LIN Yu3
(1. Guangxi Key Laboratory of Road Structure and Materials, Guangxi Transportation Science and Technology Co., Ltd., Nanning, Guangxi 530007, China； 2. 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; 3. College of Civil and Transportation Engineering, Hohai University, Nanjing, Jiangsu 210098, China)
Abstract：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.
刘卫东1,2， 刘圣洁3， 王海名3， 林钰3. 温拌阻燃沥青阻燃机理的红外和热重差热分析[J]. 江苏大学学报（自然科学版）, 2024, 45(2): 242-248.
LIU Weidong1,2， LIU Shengjie3， WANG Haiming3， LIN Yu3. Infrared and thermogravimetric analysis of flame retardant mechanism for warm-mix flame retardant asphalt[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2024, 45(2): 242-248.
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