Application Of Oil Shale Waste Residue In Asphalt Road Engineering

Asphalt pavement has many advantages,such as driving comfort,simple construction process and short open traffic time.In recent years,it has been widely used in the construction of highway engineering in China.With the rapid development of China's economy,people are traveling.The demand for asphalt pavement has been raised,and more than 90% of the road surface in China's highway construction is asphalt pavement.Therefore,the research and analysis of the performance and disease of asphalt pavement has become the focus of scholars.The summer in the south is hot,the temperature is up to 40 °C,the road surface temperature can reach above 60 °C,the asphalt in the high temperature environment,the adhesion is reduced,and it is easy to be deformed.Under the action of the driving load,the defects such as rutting and bagging are prone to occur..In the cold regions of northern China,the winter temperature can reach below-30 °C,and the road surface temperature can reach below-40 °C,so in the northern region,the pavement damage accounts for more than 60% of the pavement damage.Due to freezing and spring freezing and thawing cycles.Firstly,from the perspective of environmental protection,this paper seeks to solve the problem of oil shale waste accumulation pollution.It is based on the performance of asphalt pavement and seeks to solve the common diseases of asphalt pavement.This paper combines the two ingeniously.The oil shale waste residue replaces the fine aggregate in the asphalt mixture,and has been verified by a large number of experiments to solve the problem of accumulation of oil shale waste residue and improve the road performance of the asphalt mixture.Since the oil shale waste is acid stone,its adhesion to asphalt is not good.Therefore,the silane coupling agent is used to modify the asphalt to improve the bonding performance between the oil shale waste and the asphalt.First,the optimum amount of the silane coupling agent is determined by the penetration and softening point.Secondly,through experiment data,the best oil-stone ratio of various oil shale wastes to replace the fine aggregate range is determined,and then the Marshall test piece is formed by using the best oil-stone ratio in each alternative range,and the Marshall stability test is carried out,and the oil is obtained through experimental data analysis.The best alternative range for shale waste.Finally,the road performance of oil shale instead of asphalt mixture was analyzed and evaluated.The three asphalt mixtures of non-replacement asphalt mixture,SBS non-replacement asphalt mixture and oil shale replacement asphalt mixture were compared and analyzed.Including: rutting experiment,low temperature rupture test,trabecular bending test,water immersion Marshall experiment and freeze-thaw cycle Marshall stability test.Through experimental analysis,it is found that the road performance of oil shale instead of asphalt mixture is stronger than that of non-alternative asphalt mixture,which is equivalent to the road performance of SBS non-replacement asphalt mixture.This provides a theoretical basis for the application of oil shale waste in asphalt road engineering.In this paper,the three asphalt mixtures are analyzed economically.The material cost of oil shale instead of asphalt mixture is the lowest.The material cost of SBS no substitute asphalt mixture is the highest,and the road performance of the two is equivalent.The replacement of asphalt mixture by oil shale waste has good economics and offers the possibility of practical engineering use.This paper mainly studies the road performance of oil shale waste residue instead of asphalt mixture,and proves that the fine aggregate of oil shale waste residue instead of asphalt mixture can effectively improve the road performance of asphalt mixture,but Its mechanical properties and tensile properties are subject to further study.