The Enhancement Technology Of Anti Sliding Performance Of Longitudinal Slope Asphalt Pavement Under Heavy Transportation

In recent years, with the rapid development of highway in our country, it is axle load and speed, leading to frequent traffic accidents, especially in the growing up longitudinal slope sections. Studies have shown that the traffic accident rate has an important relationship with the skid resistance of pavement, therefore the research for skid resistance of highway surface has important significance.Based on the macro texture and micro texture of asphalt pavement tectonic characteristics, the paper studies anti slide performance and the key factors that influence the performance by explaining the force analysis of car and the interface features of tires contact with the pavement surface.According to the structure characteristics and strength of asphalt mixture in the view of formation mechanism is analyzed in theory, and gives the requirements of raw materials and technology By comparing with common design method, it is considered that Marshall design method is simple and economic, and the standard of our country also provides the use of this method, so this paper uses Marshall design method.On the basis of AC and SMA grading, a new type of anti- skid mix ratio with two types of advantages is designed. This paper introduces the ratio design steps of the hot mix asphalt mixture, according to the lessons from previous research results, and chooses basalt aggregate, finely ground limestone powder, modified asphalt; Marshall test procedure are introduced in detail, according to the physical and mechanical indexes, it is to determine the gradation of the optimum asphalt content and through rutting test, analysis of leakage test, dispersion test indicators to comprehensive test mix of rationality.Friction coefficient and tectonic depth is evaluation of pavement skid resistance index, to measure initial anti sliding ability of new pavement.Through the loading instrument track to study different gradation and different nominal maximum size against sliding performance impact, there is drawing that the anti sliding performance with more coarse aggregate content and grain size grade is good, and that the anti sliding ability at the beginning of the test drops considerably from the pendulum swing value of attenuation curves indicated. Along with the test, attenuated amplitude decreases gradually and tends to be stable with the test.