Abstract
ABSTRACT Spray and chip seals are the most important form of road surfacings in Australia. The long term hardening of the asphalt binder (its durability) is of critical importance in determining their life. The Australian Road Research Board (ARRB) Durability Test measures the intrinsic resistance of an asphalt cement to oxidative hardening and has been used in specifications for many years. A model which allows calculation of the rate of asphalt hardening in a sprayed seal has already been presented. It is based on data from road trials monitored for up to 15 years. A second model now permits calculation of the viscosity level at which seal distress occurs in a particular climatic area. By using the combined models it is possible to predict surfacing life. The parameters required for the calculation are the average temperature at the site and the asphalt Durability Test result. Application of the models to sites; in the U.S. suggests that, if seal lives comparable to those in Australia are to be achieved...
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
