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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

, PP. 1597-1603

Keywords: 路面材料,改性沥青,阻燃剂,流变性能,阻燃机制

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Abstract:

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.

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