Highways Agency Reports

A laboratory investigation and full-scale trial of Chemcrete U1-49 in a low-stability hot rolled asphalt are described. In laboratory tests, the addition of 2% of Checrete U1-49 resulted in improvements to stability, modulus and wheel-tracking rate. In a full-scale road trial, the same ashpalt mix with Chemcrete in 70% bitumen was laid satisfactorily under adverse weather conditions and, after 1 year, the test section showed superior rutting and retention of texture compared with a control material using an unmodified 70 pen bitumen; after this period of time the Chemcrete materials were not apparently fully cured.