Fatigue Performance of Terminal Blend Rubberized Asphalt Mixture

Abstract:

The fatigue performance of terminal blend rubberized asphalt mixture was researched by BFA which was selected to do four point bending beam fatigue tests. The fatigue performance considering self healing between Terminal Blend AC13 and SBS AC13 was compared which had the same air voids. Further research was done on fatigue performance and high temperature performance of the compound modified asphalt mixture though mixing SBS into terminal blend rubberized asphalt. The results show that NfNM is more suitable than Nf50 to be the fatigue damage standard for terminal blend asphalt mixtures. The correlation of terminal blend asphalt mixture’s fatigue performance and three factors which are strain, asphalt content and air void ratio is researched. Terminal blend asphalt mixture AC13’s fatigue equations is regressed. Regardless of whether the self healing is considered, when the air voids of mixture is 4%, SBS AC13 has longer fatigue life than TB AC13, but TB AC13 gets better self healing capability. Regardless of whether the self healing is considered, when the air voids of mixture is 4%, the fatigue life of TB+SBS AC13 is twice as much as the fatigue life of SBS AC13, and also TB+SBS AC13 gets better self healing capability than SBS AC13. The high temperature performance of TB+SBS AC13 can far exceed the SBS AC13.