抗车辙沥青混合料路用性能研究
发布时间:2018-05-17 04:02
本文选题:沥青路面 + 抗车辙剂 ; 参考:《长安大学》2012年硕士论文
【摘要】:随着公路交通量的增长、汽车轴载的加大以及渠化交通的加剧,沥青路面的车辙损坏越来越普遍,车辙问题成为沥青路面早期病害中亟须解决的问题。本文在深入研究国内外车辙防治措施的基础上,选用Antiru-I和PR PLAST.S两种抗车辙剂,研究抗车辙剂对沥青结合料和沥青混合料性能的影响规律和改性机理。 本文针对新型抗车辙剂Antiru-I进行研究,采用湿法、干法两种改性工艺,根据改性工艺的复杂性、经济性和路用性能试验结果,提出干法改性工艺优于湿法改性工艺。在此基础上,选用Antiru-I和PR PLAST.S两种抗车辙剂,进行抗车辙剂沥青混合料高温稳定性能、低温抗裂性能、水稳定性能和抗老化性能的试验研究,并与基质沥青混合料和SBS改性沥青混合料性能进行对比,得出Antiru-I抗车辙剂能够大幅度地提高沥青混合料的高温稳定性能,对沥青混合料的低温抗裂性能、水稳定性能和抗老化性能也有不同程度的改善作用,但提高幅度有限。 针对抗车辙剂的改性目的,提出抗车辙剂沥青混合料性能检验的参考标准:沥青混合料的高温稳定性能应依据改性沥青混合料的技术要求执行,沥青混合料的低温抗裂性能可依据普通沥青混合料的技术要求执行。结合车辙试验和低温弯曲试验结果,得到Antiru-I、PR PLAST.S抗车辙剂在不同气候分区中适用的掺量范围。综合考虑沥青混合料的各项路用性能,采用多级模糊综合评价模型对不同掺量抗车辙剂方案进行综合评价,确定出抗车辙剂的最佳掺量,,建议Antiru-I抗车辙剂的最佳掺量为6‰,PR PLAST.S抗车辙剂的最佳掺量为4‰。
[Abstract]:With the increase of highway traffic, the increase of vehicle axle load and the aggravation of channelized traffic, rutting damage of asphalt pavement is becoming more and more common. Rutting problem becomes an urgent problem in the early disease of asphalt pavement. On the basis of deep research on rutting prevention measures at home and abroad, two kinds of anti-rutting agents, Antiru-I and PR PLAST.S, are selected to study the influence law and modification mechanism of anti-rutting agents on asphalt binder and asphalt mixture performance. In this paper, a new anti-rutting agent (Antiru-I) is studied. Wet and dry modification techniques are adopted. According to the experimental results of complexity, economy and road performance of the modified process, it is suggested that the dry modification process is superior to the wet modification process. On this basis, two kinds of rutting resistant agents, Antiru-I and PR PLAST.S, are selected to study the high temperature stability, low temperature crack resistance, water stability and aging resistance of asphalt mixture. Compared with base asphalt mixture and SBS modified asphalt mixture, it is concluded that Antiru-I rutting resistant agent can greatly improve the high temperature stability of asphalt mixture and the low temperature crack resistance of asphalt mixture. The water stability and the anti-aging property also have different degree of improvement, but the increase range is limited. In view of the modification purpose of rutting resistance agent, the paper puts forward the reference standard for performance inspection of rutting agent asphalt mixture: the high temperature stability performance of asphalt mixture should be carried out according to the technical requirements of modified asphalt mixture. The low temperature crack resistance of asphalt mixture can be carried out according to the technical requirements of ordinary asphalt mixture. Combined with the results of rutting test and low temperature bending test, the suitable range of antirusting agent antirutting agent PLAST.S in different climatic zones was obtained. Considering the pavement performance of asphalt mixture, the multi-stage fuzzy comprehensive evaluation model is used to evaluate the scheme of anti-rutting agent with different dosage, and the optimum amount of anti-rutting agent is determined. It is suggested that the best dosage of Antiru-I antirutting agent is 6 鈥
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