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低碳多功能电气石改性沥青制备及性能研究

, PP. 34-41

Keywords: 道路工程,电气石改性沥青,试验研究,机理,流变性能,低碳功能

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Abstract:

?为改善沥青的低碳环保功能,选择压、热电材料电气石对沥青改性,制备电气石改性沥青,并采用电性能试验研究电气石改性沥青的压、热电性能,借助傅里叶变换红外光谱(FTIR)试验分析其作用机理,采用动态剪切流变试验(DSR)、弯曲梁流变试验(BBR)和Brookfield旋转粘度试验,系统分析电气石掺量及类型对电气石改性沥青高温性能、低温性能和粘温特性的影响规律,在此基础上,对电气石改性沥青的低碳功能进行全面研究。结果表明:电气石添加到沥青后,其压、热电性能的发挥不受影响;电气石能明显改善沥青的高温流变性能,随掺量增加,电气石改性沥青的动态剪切流变性能逐渐升高,电气石负离子粉(5000ions)改性沥青的高温性能最佳;电气石改性沥青低温性能良好,其粘度随电气石掺量的增加而增大,随负离子释放量的增大而降低;电气石改性沥青具有热拌减排、阻燃抑烟及净化空气等功能。

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