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硅藻土改性沥青微观机理分析

Keywords: 道路工程,改性沥青,电镜分析和DSC试验,微观机理

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Abstract:

利用扫描电镜结合DSC量热试验,研究了硅藻土微观结构与沥青之间相互作用的机理,发现硅藻土可以均匀分布于沥青中.并与沥青形成稳定体系.硅藻土所具有的特殊微观结构,能吸收沥青的油分,有助于改善沥青的路用性能.硅藻土加入沥青,不仅起填料的作用,更主要的是改性作用.结果表明,硅藻土改性沥青能显著提高混合料的高温稳定性,对低温抗裂性也有所改善,为硅藻土改性沥青的应用提供了理论依据.

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