The Research On The Dynamic Modulus Of Asphalt Mixture

Since the reform and opening up,China's rapid economic development,at the same time,China's highway demand is also increasing,so our country constantly improve the highway system and build more and more roads into operation.The design method of asphalt pavement in our country is also corresponding with development of national economy and highway transportation system and constantly improve,all relevant departments and colleges have increased attention to the improvement of asphalt pavement design method and design index.The asphalt mixture dynamic conditions,the mechanical properties and mechanical properties under static effect condition compared with the relatively large differences,but the actual pavement stress state can be reflected through the dynamic modulus,the stress state of the dynamic modulus of asphalt mixture of asphalt pavement has important real the significance of the.In this paper,the dynamic modulus of asphalt mixture is studied as much as possible through a large number of laboratory tests.Based on a large number of experiments,this paper makes a comprehensive study on dynamic modulus.The first is the preparation of dynamic modulus of the specimen,which can be achieved by rotating compaction instrument and other experimental equipment.In order to increase the accuracy of the test and the diversity of influencing factors,this paper chooses 12 kinds of asphalt mixture,including three kinds of asphalt and the mixture of the four kinds of mixture,to prepare the test specimens.The dynamic modulus of the test specimen is tested by using the basic performance tester at six frequencies of 5 temperatures.After the dynamic modulus test,we get the relationship between the various factors and the dynamic modulus of asphalt mixture through the data processing analysis,and the trend of the influence of various factors.At the same time,based on the time temperature equivalence principle,the main curve of asphalt mixture is established.Finally,the dynamic modulus prediction model is studied,and the prediction model of the dynamic modulus of asphalt mixture is obtained.In this paper,it is of great reference value to study the influence factors and prediction model of dynamic modulus of asphalt mixture.