Site trials and specifications for lower temperature asphalts

Low temperature asphalts, often categorised into warm, half-warm and cold mix asphalts, are being promoted as a way of reducing the carbon dioxide footprint of pavement construction and maintenance. A trial with sections of low temperature asphalt surface and binder course was laid and monitored for initial properties. Based on the results and information from other trial and contracted constructions, a series of specifications have been drafted in order to encourage the greater use of such mixtures.