Research On The Application Technology Of Rock Bitumen In Leshan-Yibin Expressway

With the gradually increasing of heavy duty, heavy traffic and channel traffic phenomenon, the traditional conventional asphalt concrete pavement, because of its performance deficiencies, has been difficult to meet the requirements of today’s road traffic, resulting in road surface disease frequent, serious impact on the quality of road crossings. In order to effectively avoid the ordinary asphalt pavement deficiencies in the application of conventional asphalt modification, improving the quality of asphalt pavement, become an important issue in this stage road construction related research.Natural rock asphalt is an important modifier of asphalt has good road performance. Foreign research and application of green pavement engineering has made a lot of research, there is still a certain lack of the research and application of domestic rock asphalt. Departure from the characteristics of the rock asphalt, analyzed the necessary theoretical the performance of the rock asphalt, tested the rock asphalt modified bitumen necessary laboratory, carried out a detailed analysis from the evaluation index, the preparation process, trial efficacy. Around the high temperature stability, low temperature crack resistance, water stability properties of the rock asphalt, analyzed its modified asphalt mixture road performance. From the raw materials, optimum asphalt content, rock modified asphalt mixture mixing, transportation, paving, rolling, limited their technical requirements. Research on the rock asphalt and asphalt blending process, temperature, time, blending amount, to blend modified asphalt and asphalt reasonably. Combined with experience in engineering, construction temperature, mixing, transportation, paving, compaction, seams Treatment, open traffic time to carry out a detailed analysis and summary of key points of construction and quality control, to guide construction. The same time, relied on the Sichuan Yueyi Expressway project LM5contract section, analyzed and summarized the rock asphalt on the road, the following layer application and effect.The rock asphalt highway construction has a great advantage, can effectively reduce the road surface disease, reduce repair and maintenance costs, and extend the useful life of the road pavement to ensure the normal passage of road traffic, reduce people travel delays. The same time, rock asphalt is also an important natural resource in China has rich reserves of the rock asphalt used in highway pavement engineering, able to make full use of natural resources, reduce dependence on petroleum asphalt, reduce the consumption of oil and energy, is conducive to long-term development. Based on the rock asphalt road in Leyi Expressway, engineering applications, the following layer, the characteristics of the rock asphalt, rocks modified asphalt mixture than design, road performance, the construction process, would rock the promotion and application of asphalt in road construction, and provide some theoretical guidance and technical support.