冷拌超薄罩面沥青混合料试验研究

发布时间：2018-05-21 00:45

本文选题：冷拌超薄罩面 + 沥青混合料　；参考：《武汉轻工大学》2015年硕士论文

【摘要】：我国的高速公路大多以沥青混合料作为面层材料。由于沥青路面的早期破坏比较严重,需要及时进行路面的养护工作,常见的养护形式就是对路面进行罩面处理。沥青罩面主要采用了热拌沥青混合料、微表处和Nova Chip超薄磨耗层等,但这些都不满足“节能环保、低碳减排”的要求。在查阅大量国内外参考文献的基础上,本文提出了一种新型的冷拌超薄罩面沥青混合料,它具有噪音小、行车舒适度高、抗滑性能好、安全性高、综合造价低、可延长施工季节、环境污染小等特点,预计在路面养护中会有广阔的使用前景。沥青混合料的强度和水稳定性是冷拌超薄罩面最为关键的性质,本文介绍了其强度的形成机理和水稳定性的黏附理论,并针对这两个方面介绍了各自的测试和评价方法。混合料原材料选择后,使用规划求解法得到了矿质混合料的配合比,然后通过修正马歇尔试验和浸水马歇尔试验,求出了最佳矿粉用量、最佳基质沥青用量和最佳级配,得到冷拌超薄罩面沥青混合料的最佳配合比。采用冻融劈裂试验、车辙试验和小梁弯曲试验,通过在常规条件下和模拟养生条件下冷拌超薄罩面沥青混合料的性能试验,验证了冷拌超薄罩面沥青混合料的抗水损害性、高温稳定性和低温抗裂性的良好效果。最后,本文对冷拌超薄罩面沥青混合料的生产、储存、施工工艺、质量控制和工程验收等提出了建议,它对后续的现场施工具有一定的指导意义。
[Abstract]:Asphalt mixture is mostly used as surface material in expressway of our country. Due to the serious early damage of asphalt pavement, it is necessary to carry on the pavement maintenance work in time, the common maintenance form is to cover the pavement surface. The asphalt overlay mainly adopts hot mix asphalt mixture, micro-surface and Nova Chip ultra-thin wear layer, but these do not meet the requirements of "energy saving, environmental protection, low carbon emission reduction". On the basis of consulting a large number of references at home and abroad, this paper presents a new type of cold mix ultra-thin overlay asphalt mixture, which has low noise, high driving comfort, good skid resistance, high safety and low comprehensive cost. It can prolong the construction season, and the environmental pollution is small, which is expected to have a broad application prospect in pavement maintenance. The strength and water stability of asphalt mixture are the most important properties of cold mix ultra-thin overlay. This paper introduces the forming mechanism of its strength and the adhesion theory of water stability, and introduces the respective testing and evaluation methods in view of these two aspects. After selecting the raw materials of the mixture, the mixture ratio of the mineral mixture is obtained by using the programming solution method. Then, through the modified Marshall test and the immersion Marshall test, the optimum mineral powder dosage, the best base asphalt content and the optimum gradation are obtained. The optimum mix ratio of cold-mixed ultra-thin overlay asphalt mixture is obtained. By using freeze-thaw splitting test, rutting test and trabecular bending test, the water damage resistance of cold mixed ultra-thin overlay asphalt mixture is verified by the performance tests of cold mix ultra-thin overlay asphalt mixture under conventional and simulated health conditions. Good effect of high temperature stability and low temperature crack resistance. Finally, this paper puts forward some suggestions on the production, storage, construction technology, quality control and engineering acceptance of cold mix ultra-thin overlay asphalt mixture, which has certain guiding significance for subsequent field construction.
【学位授予单位】：武汉轻工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414

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