老化对无机复配阻燃沥青路用及阻燃性能的影响  

Effect of aging on inorganic compound flame retardant asphalt pavement application and flame retardant properties

作　　者：姜浩嘉 黄亚东 吴珂[3,4] 朱凯 Jiang Haojia;Huang Yadong;Wu Ke;Zhu Kai(School of Quality and Safety Engineering,China Jiliang University,Zhejiang Hangzhou 310018,China;Zhejiang Fire and Rescue Brigade,Zhejiang Hangzhou 310005,China;Center of Balance Architecture,Zhejiang University,Zhejiang Hangzhou 310007,China;Engineering Research Center for Urban Fire Safety,Zhejiang University,Zhejiang Hangzhou 310058,China)

机构地区：[1]中国计量大学质量与安全工程学院,浙江杭州310018 [2]浙江省消防救援总队,浙江杭州310005 [3]浙江大学平衡建筑研究中心,浙江杭州310007 [4]浙江大学市火灾安全工程研究中心,浙江杭州310058

出　　处：《消防科学与技术》2023年第6期747-751,共5页Fire Science and Technology

基　　金：国家自然科学基金资助项目(51808521);浙江省科技计划项目(2018C03029)。

摘　　要：为探究无机复配阻燃沥青在不同老化情况下的路用性能和火灾安全性能的变化规律,利用旋转薄膜烘箱(RTFOT)对阻燃沥青进行85 min短期老化、270 min长期老化和长期湿热老化。采用针入度、软化点、延度和黏度试验研究老化阻燃沥青的路用性能指标,同时结合氧指数(LOI)、热重(TG)和锥形量热试验,分析阻燃沥青老化后的火灾安全性能。试验结果表明:相较于基质沥青,阻燃沥青的抗老化性能更优,氢氧化铝、硼酸锌复配阻燃剂能有效减少老化对沥青路用性能的影响;在火灾安全性能方面,随着热氧老化时间的增加,阻燃剂与羧酸反应更多,阻燃沥青氧指数下降,同时在燃烧初期的热烟释放速率与释放量增加;而燃烧后期,老化过程中沥青生成较多重质组分,能有效抑制沥青燃烧,其热烟释放速率降低。In order to investigate the changes of pavement application and fire safety performance of flame retardant asphalt under different aging conditions,85 min short-term aging,270 min longterm aging and long-term wet heat aging of flame retardant asphalt were carried out by rotating film oven(RTFOT).The penetration,softening point,ductility and viscosity were used to research the pavement performance indexes of aging flame retardant asphalt.At the same time,the fire safety performance of aging flame retardant asphalt was investigated by combining the Oxygen index test(LOI),thermogravimetric test(TG)and conical calorimetry test.The experimental results show that the anti-aging performance of the flame retardant asphalt is better than that of the base asphalt,which can effectively reduce the influence of asphalt aging on the pavement performance.In terms of fire safety performance,with the increase of thermal oxygen aging time,the decomposition of flame retardant is more,the oxygen index of flame retardant asphalt decreases,and the release rate and amount of smoke at the initial stage of combustion increase.However,in the late combustion stage,due to the formation of multiple components of asphalt during the aging process,the combustion of asphalt can be effectively inhibited,and the release rate of hot smoke is reduced.

关 键 词：阻燃沥青 热氧老化 湿热老化 路用性能 火灾安全性能 

分 类 号：X924.4[环境科学与工程—安全科学] TU545[建筑科学—建筑技术科学]