考虑隧道阻燃的纳米黏土/ATH复合改性沥青优化设计

doi:10.11896/cldb.20090343

材料导报

2022, Vol. 36

Issue (21): 20090343-8 https://doi.org/10.11896/cldb.20090343

无机非金属及其复合材料

考虑隧道阻燃的纳米黏土/ATH复合改性沥青优化设计

杨小龙^1,*, 申爱琴², 刘贵勇¹, 蒋宜馨¹, 吴寒松²

1 广西大学土木建筑工程学院, 南宁 530004
2 长安大学公路学院,西安 710064

Optimum Design of Nano-clay/ATH Composite Modified Asphalt Considering Tunnel Flame Retardant Properties

YANG Xiaolong^1,*, SHEN Aiqin², LIU Guiyong¹, JIANG Yixin¹, WU Hansong²

1 College of Civil Engineering and Architecture, Guangxi University, Nanning 530004
2 School of Highway, Chang'an University, Xi'an 710064, China

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摘要为提高隧道沥青材料阻燃性能,选取不同类型纳米黏土(膨润土(OMMT)和层状双金属氢氧化物(LDH))和金属氢氧化铝(ATH)进行复掺制备复合改性沥青,并采用三大指标和极限氧指数(LOI)试验方法,对不同复合改性沥青的性能进行表征,在此基础上,利用综合指数法,通过多指标分析优选复合改性沥青的最佳配比,并采用热重(TG)测试方法,对优化的复合改性沥青的热解特性进行测试。结果表明,ATH/纳米黏土复合改性材料降低了沥青材料的针入度和延度并提高了其软化点,ATH/OMMT复合改性材料对沥青材料三大指标的影响程度高于ATH/LDH复合改性材料;与ATH单掺改性沥青相比,ATH/纳米黏土复合改性沥青的LOI值显著增大,两者表现出良好的协同阻燃作用,ATH/OMMT改性沥青的协同作用明显优于ATH/LDH改性沥青,而改性剂粒径对沥青性能的影响较小;基于综合指数分析方法,最终优选OMMT和ATH进行纳米复合改性沥青的制备,其中ATH掺量优选为10%,OMMT掺量为1%和3%(质量分数)。热重测试结果表明,复合改性沥青的热解成炭率显著提高,其成炭性与其阻燃性能具有良好的相关性。

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关键词: 隧道路面阻燃沥青纳米黏土金属氢氧化铝(ATH) 协同阻燃

Abstract: To improve the flame retardant performance of tunnel asphalt pavement, different types of nano clay, bentonite (OMMT) and layered double metal hydroxide (LDH), and aluminum hydroxide (ATH) were selected to prepare composite modified asphalt. The performance of different composite modified asphalt was characterized by three-index tests and limit oxygen index (LOI) test. On this basis, the optimal ratio of composites in modified asphalt was optimized by multi-index analysis. Additionally, the pyrolysis characteristics of the optimized composite modified asphalt were investigated by thermogravimetric (TG). The results show that the penetration and ductility of the modified asphalt are reduced, while the softening point is increased, with the addition of nano-clay/ATH composites. The influence of ATH/OMMT composite on the three indexes of asphalt material is more obvious than that of ATH/LDH composite. Compared with ATH modified asphalt, the LOI value of ATH/NC modified asphalt is significantly increased, and the synergistic effect of ATH/OMMT modified asphalt is obviously better than that of ATH/LDH modified asphalt. What's more, ATH and OMMT show good synergistic flame retardancy. A particle size of modifier has slight effect on the performance of asphalt. Based on the comprehensive index analysis method, OMMT and ATH are selected to prepare nano composite modified asphalt, with the content of ATH 10%, OMMT 1% and 3%. The results of TG test show that the char residual of the composite modified asphalt is significantly higher than that of the control, and the char residual of the composite modified asphalt has a good correlation with its flame retardant performance.

Key words: tunnel pavement flame retardant asphalt nano clay aluminum hydroxide (ATH) synergistic flame retardant

出版日期: 2022-11-10 发布日期: 2022-11-03

ZTFLH:

U414

基金资助: 广西研究生教育创新计划资助项目(YCSW2022074);广西科技计划项目(桂科AD21238001);广西自然科学基金项目(2022GXNSFBA035587)

通讯作者: * xiaolongyang@gxu.edu.cn

作者简介: 杨小龙,广西大学讲师、硕士研究生导师。2020年7月,在长安大学获得道路与铁道工程专业工学博士学位,毕业后于广西大学土木建筑工程学院任教。以第一及通信作者发表SCI、EI等高水平论文20余篇。目前主要从事路面材料、路面结构以及公路养护新技术等方向的研究,主持并参与完成了国家自然科学基金项目、广西交通运输部科技项目、陕西省自然科学基金项目、广西科技计划项目等多项科研课题。

引用本文:

杨小龙, 申爱琴, 刘贵勇, 蒋宜馨, 吴寒松. 考虑隧道阻燃的纳米黏土/ATH复合改性沥青优化设计[J]. 材料导报, 2022, 36(21): 20090343-8.
YANG Xiaolong, SHEN Aiqin, LIU Guiyong, JIANG Yixin, WU Hansong. Optimum Design of Nano-clay/ATH Composite Modified Asphalt Considering Tunnel Flame Retardant Properties. Materials Reports, 2022, 36(21): 20090343-8.

链接本文:

http://www.mater-rep.com/CN/10.11896/cldb.20090343 或 http://www.mater-rep.com/CN/Y2022/V36/I21/20090343

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