两种新型无机复合阻燃改性沥青的流变性能及其阻燃机制

发布时间：2018-04-22 02:10

本文选题：路面材料 + 改性沥青　；参考：《复合材料学报》2014年06期

【摘要】：针对目前沥青阻燃剂存在的毒性大、造价高及耐热性差等问题,制备了两种由金属氧化物和金属氢氧化物组成的新型无机复合阻燃剂。通过动态剪切流变试验、弯曲梁流变(BBR)试验和Brookfield旋转黏度试验,深入研究了两种新型阻燃改性沥青的高温流变性能、低温流变性能以及黏度特性。在此基础上,借助DSC试验探究了两种复合阻燃改性沥青的阻燃机制,并对比了两种无机复合阻燃剂与常用阻燃剂的经济效益。试验结果表明:两种无机复合阻燃剂阻燃的抑烟效果良好,可显著改善沥青的高温抗车辙性能,提高沥青胶浆的低温性能,增加沥青黏度;两种无机复合阻燃改性沥青的抗车辙因子与温度呈现良好的相关性;将两种复合阻燃剂加入到沥青中,能使沥青相态变化需要更多能量,改性沥青在受热过程中更加稳定。
[Abstract]:Two new inorganic composite flame retardants composed of metal oxides and metal hydroxides were prepared to solve the problems of high toxicity, high cost and poor heat resistance of asphalt flame retardants. The high temperature rheological properties, low temperature rheological properties and viscosity properties of two new flame retardant modified asphalt were studied by dynamic shear rheological test, bending beam rheological test and Brookfield rotational viscosity test. On this basis, the flame-retardant mechanism of two kinds of composite flame retardant modified asphalt was explored by means of DSC test, and the economic benefits of two inorganic composite flame retardants and common flame retardants were compared. The results show that the smoke suppression effect of two inorganic composite flame retardants is good, which can significantly improve the rutting resistance of asphalt at high temperature, improve the low temperature performance of asphalt mortar and increase the viscosity of asphalt. The rutting resistance factors of the two inorganic composite flame retardant modified asphalt show good correlation with temperature, and adding two kinds of composite flame retardant to the asphalt can make the change of the phase state of the asphalt need more energy, and the modified asphalt is more stable in the process of heating.
【作者单位】：长安大学公路学院;天津市市政工程设计研究院;
【基金】：国家自然科学基金(51208045) 高等学校博士学科点专项科研基金(20110205120007) 天津市市政公路管理局科技项目(2012-23)
【分类号】：U414

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