Ability of High Elasticity Asphalt Mixture in Resisting Semi-rigid Pavement Reflective Cracking

Abstract:

A series of tests,such as fatigue test,reflective cracking modeling test and impact ductility test,are jconducted to compare the ability of high elasticity asphalt,AH-70 asphalt and AH50 asphalt to resist reflective cracking.Tests results show that the fatigue life of high elasticity asphalt hot mix asphalt(HMA) is 88 times as long as that of AH-70 asphalt and 55 times al long as that of the AH-50 asphalt.The corresponding load cycle of initial cracking of high elasticity asphalt HMA is 2 times lager than AH-70 and AH-50 asphalt HMA.High elasticity asphalt HMA is about 2 times stronger than AH-70 and AH50 asphalt HMA in the impact ductility.As a result,high elasticity asphalt is more resistant than the other two materials to resist the reflective cracking.

Key words:high elasticity asphalt,reflective cracking,evaluation test