广东地区OGFC矿料级配及配合比优化设计研究

发布时间：2018-08-15 12:18

【摘要】：截止到2014年底,广东省高速公路通车里程已达6280公里,居全国各省市首位。其建成的高速公路主要采用沥青路面结构,尽管目前有关修筑沥青路面方面的技术日益发展,但由于广东地区高温多雨的特殊气候条件,对于解决路面雨天安全性能及高温稳定性的研究工作尚存在诸多不足,无法满足现阶段行业的需求。OGFC路面表层有大量内部连通空隙,遇到降雨,雨水会首先进入混合料内部,在表面层中排出路表范围,这种排水方式可以避免或者尽量减少路表积水,降低路表的水膜厚度,这对提高行车安全性十分有利。OGFC混合料的骨架空隙结构同时拥有良好的结构稳定性,高温条件下相比传统沥青路面有更好的抗车辙能力。再加上OGFC在抗滑,降噪等其他方面的优点,本文认为OGFC路面在广东地区有较好的发展空间。采用断级配设计理念与CAVF法相结合的的方法,优化OGFC的矿料级配与配合比设计方法,突出沥青混合料内部骨架嵌挤能力,以实现抗滑所需的良好构造及耐久性。基于搓揉车辙试验仪,对OGFC-13混合料进行长期路用性能衰减评价,对影响OGFC抗衰减性能的各项因素进行研究。针对广东地区降雨强度,从OGFC路面排水性能及保证抗水害强度两方面入手,得到推荐的目标空隙率范围,从中选择抗衰减性能更好的目标空隙率值。最后,对包茂高速粤境段OGFC试验路段进行配合比实例设计,通过室内试验证明,采用改进CAVF法设计的OGFC-13混合料各项性能都有令人满意的结果。
[Abstract]:By the end of 2014, Guangdong Province highway mileage has reached 6280 km, ranking first in all provinces and cities. The highway built mainly adopts asphalt pavement structure. Although the technology of building asphalt pavement is developing day by day at present, due to the special climate conditions of high temperature and heavy rain in Guangdong area, There are still many deficiencies in the research on the safety performance and high temperature stability of pavement in rainy days, which can not meet the needs of the industry at present. There are a large number of internal connected voids in the surface layer of OGFC pavement. When rainfall occurs, Rain Water will enter the mixture first. This drainage method can avoid or minimize the amount of water in the surface layer and reduce the thickness of the water film in the surface layer. This is very beneficial to improve the safety of running. The skeleton void structure of OGFC mixture has good structural stability and has better rutting resistance than the traditional asphalt pavement at high temperature. In addition to the advantages of OGFC in anti-skid, noise reduction and other aspects, this paper thinks that OGFC pavement has a better development space in Guangdong area. This paper adopts the method of combining the idea of gradation design with CAVF method, optimizes the design method of aggregate gradation and mix ratio of OGFC, and highlights the inlay ability of internal framework of asphalt mixture, in order to realize the good structure and durability of anti-slide. Based on the rutting test instrument, the long-term road performance attenuation evaluation of OGFC-13 mixture was carried out, and the factors affecting the anti-attenuation performance of OGFC were studied. In view of rainfall intensity in Guangdong area, the recommended range of target voidage is obtained from two aspects of drainage performance of OGFC pavement and water damage resistance intensity, and the target voidage ratio value with better anti-attenuation performance is selected. Finally, the mix ratio design of the OGFC test section of Baomao Expressway in Guangdong Province is carried out. The results of laboratory tests show that the performance of the OGFC-13 mixture designed by the improved CAVF method has satisfactory results.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414

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