Study on the Factors and Variability Affecting Recycled Asphalt Mixture by Orthogonal Test

The performance of the recycled asphalt mixture can be changed because the old asphalt mixture has variability.This paper researched the performance of recycled asphalt mixture,such as high-temperature stability,low-temperature crack resistance and water stability and its affection on the variability of the old asphalt mixture by using Marshall orthogonal experimental design and statistics methods.The purpose is to find out a scientific method to control the performance of the recycled asphalt mixture.