增塑剂改性沥青路用性能试验研究

发布时间：2018-01-18 02:15

本文关键词：增塑剂改性沥青路用性能试验研究　出处：《郑州大学学报(工学版)》2017年03期 　论文类型：期刊论文

【摘要】：为了提高沥青结合料的柔韧性,借鉴增塑剂在塑料制品的成功应用,选用两种不同类型的增塑剂,研究其对沥青的改性效果.通过针入度、软化点、延度、黏度、测力延度和弹性恢复等试验对两种增塑剂改性沥青性能进行研究,并从沥青的感温性、高低温性能、弹性恢复和老化特性等方面对路用性能改善效果做出评价.试验结果表明,两种增塑剂对沥青低温柔韧性改善效果显著,同时对沥青结合料的感温性、弹性恢复和抗老化性也有一定的改善效果,但不利于沥青的高温稳定性;对比两种增塑剂改性沥青的路用性能,马来酸二辛酯的改性效果优于邻苯二甲酸二辛酯,且建议马来酸二辛酯最佳掺量值为3.0%.
[Abstract]:In order to improve the flexibility of asphalt binder, using plasticizer for reference in the successful application of plastic products, two different types of plasticizer were selected to study the modification effect of asphalt through penetration, softening point and ductility. The properties of two plasticizers modified asphalt were studied by experiments of viscosity, force ductility and elastic recovery, and the temperature sensitivity, high and low temperature properties of asphalt were studied. The experimental results show that the two plasticizers can improve the flexibility of asphalt at low temperature and the temperature sensitivity of asphalt binder at the same time. Elastic recovery and aging resistance also have some improvement effect, but not conducive to the high temperature stability of asphalt. Compared with the pavement performance of two kinds of plasticizer modified asphalt, the modification effect of dioctyl maleate is better than that of dioctyl phthalate, and the optimum blending value of dioctyl maleate is 3.0.
【作者单位】：长安大学材料学院;长安大学公路学院;
【基金】：国家自然科学基金资助项目(51108038;51108039)
【分类号】：U414
【正文快照】： 0引言目前,应用在沥青中的改性材料,主要有3类:高分子聚合物、矿物质填料和添加剂.聚合物改性沥青可以分为3类:(1)热塑性弹性体类,代表为SBS;(2)橡胶类,如丁苯橡胶(SBR)、橡胶粉等;(3)树脂类,如聚乙烯(PE)、聚丙烯(PP)、EVA等.SBS改性沥青可以同时改善沥青的温度敏感性、高低

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