Sectioned linear fitting method of parameters for asphalt mastics viscoelastic Burgers model

The static creep curve character of asphalt mastics was analyzed, the head section and end section of the curve were fitted by sectioned linear fitting method, the parameters of asphalt mastics viscoelastic Burgers model were solved in the condition of shear creep, and sectioned linear fitting method was compared with traditional method. It is pointed that in low temperature, the average errors of two methods are less than 5%, but the maximal error of traditional method is more than 20%, and the error of sectioned linear fitting method is more than 5% only in a small time range; under high temperature, Burgers model parameters are difficultly determined by using traditional method, but the errors from sectioned linear fitting method are less than 0.01%. Analysis result shows that the new method is feasible, its fitting error is less, and its maneuverability is better.