Study On Attenuation Law Of Asphalt Pavement Anti Skid Performance Based On Fractal Theory

At present,the application of asphalt pavement is more and more extensive in our country.Most highways adopt asphalt pavement structure,while the skid resistance of pavement directly affects traffic safety.Therefore,the main factors affecting the anti skid performance of asphalt pavement are explored through experimental research,and the influence of various factors on the attenuation of anti skid performance of asphalt pavement can be obtained,which can effectively predict the attenuation of anti skid performance of asphalt pavement and ensure that the anti skid index of asphalt pavement meets the requirements of standard,so as to reduce the occurrence of accidents.In view of this,based on fractal theory and digital image technology,this paper analyzes the microstructure and macro gradation of asphalt mixture,and studies the factors affecting the anti skid performance of the pavement,and the results have practical application value for predicting the attenuation performance of asphalt pavement.The main research contents are as follows:(1)This paper introduces the definition of fractal theory,and introduces the methods to characterize the anti skid performance of the pavement in China,which mainly uses the fractal dimension of aggregate and the fractal dimension of the aggregate,and introduces how to use software to deal with the digital picture so as to get a reliable fractal dimension.(2)Based on the fractal theory,the microstructure of the mixture is analyzed by the discrete exposed size function.The correlation between the fractal dimension of the surface of the pavement and the fractal dimension of the aggregate quality is demonstrated,and the quantitative relation between the fractal dimension of the asphalt mixture and the anti skid performance of the road surface is established.(3)An laboratory test is designed to demonstrate that the grade of coarse aggregate and bituminous mixture have an effect on the attenuation of anti skid performance,and the effect of the two is different,and it is found that the quantitative evaluation of the effect of the dimension fractal dimension of the aggregate on the attenuation rate of the anti skid performance can make up for the deficiency of the laboratory test.(4)Based on the simulation test,the prediction model of anti skid performance of Asphalt Pavement Based on Aggregate and Gradation is established,and the model is verified by example,and the reliability of the model is proved by the research project of the project group.