This paper describes aspects of three studies concerned with the treatment of cracked asphaltic concrete road surfacings. In the first study a model has been developed, based on five years data, which calculates the probability of reflection cracking occurring in thin bituminous maintenance overlays. The key factors influencing the rate of reflection cracking were the severity of cracking and the deflection prior to overlay, and traffic.
In the second study the effectiveness of six alternative crack relieving interlayers have been tested on a heavily trafficked site and the paper describes the early performance of these alternatives.
The third study is concerned with sealing cracks in asphaltic concrete surfacings. The effectiveness of a number of different techniques has been tested on a moderately trafficked site.
Rolt, J.; Hasim, M.S.; Hameed, M.; Suffian, Z. Second Malaysian Road Conference ‘96, Innovations in Road Building, Kuala Lumpur, 10-13 June 1996. TRL - Crowthorne, UK, (1996) 11 pp.