沥青混合料应用于寒冷地区的配合比优化设计研究
发布时间：2019-01-26 16:42
【摘要】：我国寒区面积广阔,包括所有的冰川区、多年冻土区和绝大多数稳定性季节积雪区,沥青路面以其良好的使用性能成为目前高等级公路的主要路面结构型式,由于冬季严寒、夏季恶劣、雨热同季的恶劣气候条件,寒区沥青路面更容易出现横向裂缝、坑槽、车辙等各种早期病害,严重影响了沥青路面使用质量和寿命,使得养护维修成本高居不下。已有研究表明,沥青膜厚度及沥青混合料矿料级配是影响沥青混合料水稳定性、高温稳定性及低温开裂性的两个重要方面。为提升寒区沥青路面的路用性能,本文通过寒区运营期高速公路沥青路面车辙、横向裂缝的调查和分析、在建高速公路沥青混合料矿料级配与路用性能相关性分析、沥青用量对沥青混合料路用性能分析及沥青混合料配合比优化试验研究,系统分析了两者对沥青混合料路用性能的影响,提出了适合寒区的ATB-25、AC-20及SMA-16三种沥青混合料的矿料级配范围与粉胶比范围。为验证本文提出的沥青混合料矿料级配范围及沥青用量控制指标的合理性,以通丹高速公路为依托,修筑了长400m的沥青下面层试验路段,通过对试验段沥青路面的设计、施工及后期观测数据的分析研究,验证了研究结论的适用性,对寒区沥青公路沥青路面建设具有良好的借鉴意义。
[Abstract]:The cold area of our country is vast, including all glacial regions, permafrost regions and most stable seasonal snow cover areas. Asphalt pavement has become the main pavement structure type of high grade highway due to its good service performance. In the severe summer and the severe weather conditions of the same season, asphalt pavement in cold area is prone to various early diseases, such as transverse cracks, potholes, ruts and so on, which seriously affect the quality and service life of asphalt pavement, and make the maintenance cost high. It has been shown that the thickness of asphalt film and the gradation of asphalt mixture are two important aspects that affect the water stability, high temperature stability and low temperature cracking of asphalt mixture. In order to improve the road performance of asphalt pavement in cold region, this paper analyzes the rutting and transverse cracks of highway asphalt pavement during operation period in cold area, and analyzes the correlation between asphalt mixture aggregate gradation and road performance of the highway under construction. The influence of asphalt content on pavement performance of asphalt mixture and mixture ratio optimization of asphalt mixture is analyzed systematically, and the ATB-25, suitable for cold region is put forward. The range of aggregate gradation and powder / binder ratio of AC-20 and SMA-16 asphalt mixture. In order to verify the rationality of the asphalt mixture gradation range and asphalt dosage control index proposed in this paper, based on Tongdan Expressway, a 400m long test section of asphalt underlayer was built, and the design of asphalt pavement in test section was carried out. The analysis and study of the construction and later observation data verify the applicability of the research conclusion and have a good reference significance for the construction of asphalt pavement of asphalt highway in cold area.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U414
，
本文编号：2415677
[Abstract]:The cold area of our country is vast, including all glacial regions, permafrost regions and most stable seasonal snow cover areas. Asphalt pavement has become the main pavement structure type of high grade highway due to its good service performance. In the severe summer and the severe weather conditions of the same season, asphalt pavement in cold area is prone to various early diseases, such as transverse cracks, potholes, ruts and so on, which seriously affect the quality and service life of asphalt pavement, and make the maintenance cost high. It has been shown that the thickness of asphalt film and the gradation of asphalt mixture are two important aspects that affect the water stability, high temperature stability and low temperature cracking of asphalt mixture. In order to improve the road performance of asphalt pavement in cold region, this paper analyzes the rutting and transverse cracks of highway asphalt pavement during operation period in cold area, and analyzes the correlation between asphalt mixture aggregate gradation and road performance of the highway under construction. The influence of asphalt content on pavement performance of asphalt mixture and mixture ratio optimization of asphalt mixture is analyzed systematically, and the ATB-25, suitable for cold region is put forward. The range of aggregate gradation and powder / binder ratio of AC-20 and SMA-16 asphalt mixture. In order to verify the rationality of the asphalt mixture gradation range and asphalt dosage control index proposed in this paper, based on Tongdan Expressway, a 400m long test section of asphalt underlayer was built, and the design of asphalt pavement in test section was carried out. The analysis and study of the construction and later observation data verify the applicability of the research conclusion and have a good reference significance for the construction of asphalt pavement of asphalt highway in cold area.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U414
，
本文编号：2415677
本文链接：https://www.wllwen.com/kejilunwen/jiaotonggongchenglunwen/2415677.html
