Performance improvement of a crumb rubber modified bitumen using polyoctenamer and cross linking agent

Abstract

Polyoctenamer, crumb rubber (CR) and sulphur were combined to modify the base bitumen in order to improve the performance of bitumen. Based on the results obtained from conventional tests (penetration, softening point, elastic recovery, viscosity and storage stability) and Rheological and low-temperature cracking test result showed that modification of the bitumen binder with the combination of reactive polyoctenamer and cross-linking agent was found to promote anchoring of CR in bitumen to produce storage stable CR-modified bitumen. The results overall indicate that these modified crumb rubber modified bitumen binder have significantly improved the performance of bitumen.