Abstract
ABSTRACT Existing research has shown that the inclusion of polyethylene terephthalate (PET)-based additives can help in improving the performance of crumb rubber-modified bitumen (CRMB). However, its field applicability is limited as a result of inadequate storage stability and phase separation issues. This study was concerned with the further improvement in the stability of such binders by the incorporation of a dicarboxylic acid group into the blend, achieved with the addition of sebacic acid. The CRMB binders were prepared by the additives synthesised from waste PET and sebacic acid at different proportions, and tested through various conventional binder tests, storage stability test, superpave performance grading, Marshall Stability tests and Hamburg wheel tracking tests. The results indicated that the combination of sebacic acid and PET additives considerably improved the storage stability of CRMB, to within the acceptable limits for field applicability. It was further proposed that the chemical interaction of these additives with bitumen will help in increasing the phase integrity of CR in the bitumen matrix. From the various rheological tests conducted, it was also seen that the modified binders provided comparative performance at high temperatures when compared to CRMB, and improved performance at intermediate and low temperatures.
Sign-in/Register to access full text options 
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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
