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Investigation into the properties of asphalt mixtures containing magnesium hydroxide flame retardant

机译：含氢氧化镁阻燃剂的沥青混合料性能研究

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摘要

In this study, horizontal burning, limiting oxygen index (LOI) and direct burning tests were conducted to evaluate the effects of magnesium hydroxide (MH) on flame retardancy for asphalt. The influence of MH on the mechanical properties of the asphalt mixtures was also evaluated using a Marshall stability test and an indirect tensile strength test. The results indicate that MH improves the thermal stability of asphalt. The presence of MH reduces the horizontal burning classification of asphalt from FH-3 to FH-1, and the LOI is also increased. Reductions in the average burning time and mass loss were observed. The volume of flammable volatiles released from asphalt was reduced. By replacing some of the mineral filler in asphalt with equal quantities of MH, the Marshall stability was increased, its loss decreased. Similarly, the indirect tensile strength (ITS) was increased, but the ITS loss increased slightly. It is concluded that MH can be used as flame retardant for asphalt mixtures without significantly reducing the original pavement performance. This may provide a novel and safer road material, especially for use in tunnel roadways.
机译：在这项研究中，进行了水平燃烧，极限氧指数（LOI）和直接燃烧测试，以评估氢氧化镁（MH）对沥青阻燃性的影响。还使用马歇尔稳定性试验和间接拉伸强度试验评估了MH对沥青混合料机械性能的影响。结果表明，MH提高了沥青的热稳定性。 MH的存在将沥青的水平燃烧分类从FH-3降低到FH-1，并且LOI也增加了。观察到平均燃烧时间和质量损失的减少。减少了从沥青释放的易燃挥发物的体积。通过用等量的MH代替沥青中的某些矿物填料，可以提高马歇尔稳定性，并减少其损失。同样，间接拉伸强度（ITS）有所增加，但ITS损失略有增加。结论是，MH可以用作沥青混合料的阻燃剂，而不会显着降低原始路面性能。这可以提供新颖和更安全的道路材料，尤其是用于隧道道路的材料。

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  • 来源
    《Fire Safety Journal》 |2011年第6期|p.330-334|共5页
  • 作者

    Tao Xu; Xiaoming Huang; Yongli Zhao;

  • 作者单位

    School of Transportation, Southeast University, Nanjing 210096, Jiangsu, China,Department of Mechanical Engineering, Louisiana State University, Baton Rouge, LA 70803, USA,Corresponding author at: School of Transportation, Southeast University, Nanjing 210096, Jiangsu, China;

    School of Transportation, Southeast University, Nanjing 210096, Jiangsu, China;

    School of Transportation, Southeast University, Nanjing 210096, Jiangsu, China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    asphalt binder; magnesium hydroxide; flame retardancy; pavement performance;

    机译：沥青粘合剂氢氧化镁阻燃性路面性能;

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