Study On The Relationship Between Btructural Modulus Of Asphalt Pavement And Friction Coefficient Of Pavement

With the rapid development of China’s highway industry,the frequency of traffic accidents has also tended to increase.Indeed,the cause of traffic accidents is multifaceted,Poor road surface skid resistance is one of the important reasons,and the coefficient of friction between the vehicle tire and the road pavement has a direct relationship with the skid resistance.Measuring the surface friction is simple,with the inaccurate test results.Therefore,developing a real-time measurement simulate tire-the dynamic friction contact surface friction tester for pavement interaction system,measuring changes in real-time rolling,sliding friction coefficient and long-term load skid resistance,which seems very importance.In this paper,adopting the newly developed surface friction tester for searching the relationship with the pavement modulus and the road surface friction resistance,the research is good for improving the pavement skid resistance and reducing accidents.Specific studies are as follows:Developing and testing a new coefficient of friction tester.The pavement structure、speed and vehicle load are selected as the design parameters,design a new coefficient of friction tester,and verify the safety and feasibility with the mechanical commissioning and experimental debugging.The test of asphalt pavement structure compressive resilient modulus,select test pavement structure layer type,and then determine the structure of each layer and protocol specification based on the structure of each layer,compressive resilient modulus test,test the compressive resilient modulus and by the corresponding formula,in terms of the overall structure of the pavement modulus..Adopting the new surface friction tester,and set on the upper load and driving speed,three kinds of grass-roots type of road surface friction coefficient was measured,and the relationship of the overall structure of pavement modulus with the rolling friction resistance and the sliding friction resistance was concluded.Firstly,With the increase of the overall structure of the modulus,the rolling friction of road surface coefficient gradually decreases,as the vehicle speed increases,the road surface rolling friction coefficient decreasing.When the overall structure of the road surface modulus increase,the road surface rolling friction coefficient decreases more obviously.With the increase of the upper load,the road surface rolling friction coefficient gradually increased,and when the overall structure of the pavement modulus increased,the road rolling friction coefficient increasing trend weakened.Secondly,With the increase of the overall structure of the modulus,the sliding friction of road surface coefficient gradually decreases,as the vehicle speed increases,the road surface sliding friction coefficient decreasing.When the overall structure of the road surface modulus increase,the road surface sliding friction coefficient decreases more obviously.With the increase of the upper load,the road surface sliding friction coefficient gradually increased,and when the overall structure of the pavement modulus increased,the road sliding friction coefficient increasing trend weakened.