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多年冻土地区硅藻土改性沥青混合料路用性能试验

, PP. 23-28

Keywords: 道路工程,硅藻土改性沥青,路用性能试验,隔热性能,多年冻土

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Abstract:

?针对青藏公路多年冻土区极端恶劣的自然地理条件及黑色路面强吸热作用引起多年冻土融化下沉的特点,采用硅藻土对青藏公路改建完善工程中使用的AH-110#道路石油沥青进行了改性研究,对改性沥青及沥青混合料的高温稳定性、低温抗裂性、水稳定性等路用性能进行了评价,对硅藻土改性沥青的隔热性能进行了试验分析。研究结果表明:硅藻土改性沥青混合料的低温抗裂性、高温稳定性、水稳定性等路用性能均有所改善,隔热性能得到明显提高;铺筑的试验段病害率明显低于SBR改性沥青路段,表明硅藻土改性沥青在多年冻土地区具有良好的适用性。

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