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首页> 外文期刊>Construction and Building Materials >Development of eco-friendly fire-retarded warm-mix epoxy asphalt binders using reactive polymeric flame retardants for road tunnel pavements
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Development of eco-friendly fire-retarded warm-mix epoxy asphalt binders using reactive polymeric flame retardants for road tunnel pavements

机译：使用反应性聚合物阻燃剂进行环保防火热混合环氧沥青粘结剂，用于道路隧道路面

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摘要

Epoxy asphalt binder is flammable and plenty of fumes are produced during its high-temperature pavements in tunnels. To improve fire retardancy and reduce asphalt fumes, eco-friendly flame-retarded warm-mix epoxy asphalt binders (WEABs) for road tunnel pavements were developed by incorporation of reactive polymeric flame retardant (RPFR), which was composed of a reactive polymeric brominated epoxy oligomer (BEO) and antimony oxide. The influence of RPRF on flame retardancy, rotational viscosity, microstructures, thermal properties and mechanical performance of the pure WEAB was investigated using various techniques: oxygen index instrument, Brookfield viscometer, confocal microscope, differential scanning calorimeter, thermogravimetric analyzer and universal testing machine. The presence of RPFR significantly improved the limited oxygen index (LOI) of the pure WEAB. The LOI of RPFR modified WEABs increased in the flame retardant loading. The reaction of epoxide groups of RPFR with the curing agents of epoxy asphalt reduced the viscosity of the pure WEAB and extended the allowable construction time of the WEAB mixture. The inclusion of RPFR increased the glass transition temperature (Tg) of the pure WEAB. For modified WEABs, the Tg increased in the RPFR loading. RPFR reacted into the epoxy asphalt backbone through the reaction between epoxy groups and curing agents. The incorporation of RPFR improved the thermal stability of the pure WEAB. The addition of 8 wt% RPFR increased the tensile strength of the pure WEAB, while the inclusion of RPFR slightly decreased the break elongation of the pure WEAB. Double phase separation occurred in RPFR modified WEAB: the main phase separation included the continuous epoxy phase and the discontinuous asphalt domains, in which the secondary phase separation formed with asphalt as the continuous phase and spherical BEO domains as the discontinuous phase. The particle size of BEO domains decreased with the increase of the RPFR loading. (C) 2021 Elsevier Ltd. All rights reserved.
机译：环氧沥青粘合剂是易燃的，在隧道的高温路面期间产生大量烟雾。为了改善阻燃性和减少沥青烟雾，通过掺入反应性聚合物阻燃剂（RPFR）来开发用于道路隧道路面的环保阻燃热混合环氧沥青粘结剂（织布），其由反应性聚合物溴化环氧树脂组成低聚物（BEO）和氧化锑。使用各种技术研究了RPRF对阻燃性，旋转粘度，微观结构，热性质和机械性能的影响：氧指数仪器，布鲁克菲尔德粘度计，共聚焦显微镜，差示扫描量热计，热重分析仪和通用试验机。 RPFR的存在显着改善了纯Weab的有限氧指数（LOI）。 RPFR改性织物的LOI在阻燃载荷中增加。 RPFR的环氧基团与环氧沥青固化剂的反应降低了纯织物的粘度，并延伸了织物混合物的允许施工时间。包含RPFR增加了纯Weab的玻璃化转变温度（Tg）。对于修饰的织物，TG在RPFR载荷中增加。 RPFR通过环氧基团和固化剂之间的反应反应到环氧沥青骨架中。 RPFR的掺入改善了纯织造织物的热稳定性。添加8wt％的RPFR增加了纯织物的拉伸强度，而rpfr略微降低纯织物的断裂伸长率。在RPFR改性的Weab中发生双相分离：主相分离包括连续环氧相和不连续沥青结构域，其中用沥青形成的二次相分离为连续相和球形BEO结构域作为不连续阶段。随着RPFR载荷的增加，BEO结构域的粒度降低。 （c）2021 elestvier有限公司保留所有权利。

著录项

  • 来源
    《Construction and Building Materials》 |2021年第17期|122752.1-122752.11|共11页
  • 作者

    Chen Ru; Zhao Ruikang; Liu Ya; Xi Zhonghua; Cai Jun; Zhang Junsheng; Wang Qingjun; Xie Hongfeng;

  • 作者单位

    Nanjing Univ Sch Chem & Chem Engn MOE Key Lab High Performance Polymer Mat & Techno Nanjing 210093 Peoples R China;

    Nanjing Univ Sch Chem & Chem Engn MOE Key Lab High Performance Polymer Mat & Techno Nanjing 210093 Peoples R China;

    Nanjing Univ Sch Chem & Chem Engn MOE Key Lab High Performance Polymer Mat & Techno Nanjing 210093 Peoples R China;

    Nanjing Univ Expt Chem Teaching Ctr Sch Chem & Chem Engn Nanjing 210023 Peoples R China;

    Nanjing Univ Publ Instrument Ctr Sch Chem & Chem Engn Nanjing 210023 Peoples R China;

    Nanjing Univ Sch Chem & Chem Engn MOE Key Lab High Performance Polymer Mat & Techno Nanjing 210093 Peoples R China;

    Nanjing Univ Sch Chem & Chem Engn MOE Key Lab High Performance Polymer Mat & Techno Nanjing 210093 Peoples R China;

    Nanjing Univ Sch Chem & Chem Engn MOE Key Lab High Performance Polymer Mat & Techno Nanjing 210093 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Epoxy asphalt; Brominated flame retardant; Polymeric flame retardant; Limited oxygen index; Phase separation; Glass transition temperature; Thermal stability; Mechanical properties;

    机译：环氧沥青;溴化阻燃剂;聚合物阻燃剂;有限的氧指数;相分离;玻璃化转变温度;热稳定性;机械性能;

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