Gray Relational Analysis of the Mechanical Responses of Asphalt Pavement Structure with Graded Crushed Stone Base

In this paper,mechanical indexes of two typical kinds of graded crushed stone base asphalt pavement structures are compared and analyzed under different thickness using an American software KENPAVE,such as surface deflection,tensile strain at the bottom of asphalt layer,compressive strain on the top of subgrade etc. . The impacting degree of all the indexes on pavement structure is analyzed using the grey relational analysis method. The results indicate that inverted pavement structure is superior to flexible base pavement structure,and the structure is optimum when the thickness of granular interlayer is about 15 cm.