The Experimental Research Of Asphalt Mixture Dynamic Modulus

The load Vehicle for road surface, is a kind of dynamic load. Dynamic load exert verticalvibration impact and horizontal pushing force on the road surface. The impact and forcechange over time. The mechanical properties of asphalt mixture is far more different underdynamic load and static load. So researching of the testing method of dynamic modulus ofasphalt mixture, the relationship between dynamic modulus and static modulus, the change ofmechanical properties law of asphalt mixture under dynamic load, has very importantsignificance.This paper simply analyses the present research situation on dynamic modulus indomestic and foreign, and simply introduce the application of dynamic modulus in pavementdesign. Through the comparative analysis, decided that the repeat loading method is used astest method, and also as the basic ways of laboratory test; Analyses the theory of theviscoelastic property of asphalt mixture, and introduce the concept of static modulus,dynamic modulus, and the time-temperature equivalent principle of asphalt mixture;Illustrates the asphalt, aggregate used in the test, and determines several typical grading in theexperiment.Introduce the standard test methods of dynamic and static modulus. Analyses the variousinfluencing factors of dynamic modulus, study the rut factor E*/sin Ф, analysis therelationship between the phase Angle and load frequency. Using time-temperature equivalentprinciple obtain some typical grading dynamic modulus master curve。Reference to researchresults at home and abroad, gives the forecast equation, of the dynamic modulus and obtainsthe relationship between dynamic modulus and static modulus.