Research on quantitative method of rheological test evaluation index of asphalt mixture
Aiming at addressing the problems of inaccuracy of flow number calculations from direct test method and difference method,which affects the accuracy of high-temperature performance evaluation for asphalt mixture,a four-parameter model fitting method is proposed to determine flow number,and the model fitting stability is analyzed.Meanwhile,the effectiveness of the results obtained by using direct test method,difference method and four-parameter model fitting method is compared.The results indicate that the zero point of the second derivative function of the four-parameter model fitting method is the flow point,and the flow numbers obtained by this method remain stable and unaffected by the data fluctuation in test process,and exhibit strong correlation and high effectiveness with the dynamic stability.
road engineeringrheological testflow numberquantitative index
NETL
NSTL
万方数据
