Towards storage-stable high-content recycled tyre rubber modified bitumen

Lo Presti, D.; Izquierdo, M.A.; Jiménez del Barco Carrión, A.

Abstract

The addition of crumb rubber particles as bitumen modifier can be currently considered as a well-established alternative to conventional polymers for bitumen modification. However, Recycle Tyre Rubber (RTR) modified binders still present drawbacks such as poor mix workability and hot storage stability. Within this study the authors try unlocking the full potential of devulcanised tyre rubber-heavy oils blend, named Liquid Rubber (LR), by exploring the possibility of tailoring recycled polymer modified bitumen with unconventional high-content of RTR and designed to overcome the above mentioned technological problems of RTR modified bitumen while keeping its advantages. Results show that LR-bitumen blends incorporating up to 30% RTR in weight of total binder clearly improves useful temperature interval of base bitumen by maintaining solubility values allowing them to be considered stable at hot-storage temperature. Furthermore, the LR modifier allows reducing usual manufacture temperatures up to 30 °C by providing superior low and intermediate temperature rheology, however high service temperature properties are improved only at low strain.

Citation

Lo Presti, D., Izquierdo, M., & Jiménez del Barco Carrión, A. (2018). Towards storage-stable high-content recycled tyre rubber modified bitumen. Construction and Building Materials, 172, https://doi.org/10.1016/j.conbuildmat.2018.03.226

• Journal Article Type: Article
• Acceptance Date: Mar 23, 2018
• Online Publication Date: Mar 31, 2018
• Publication Date: May 30, 2018
• Deposit Date: Jul 2, 2018
• Publicly Available Date: Apr 1, 2019
• Journal: Construction and Building Materials
• Print ISSN: 0950-0618
• Electronic ISSN: 1879-0526
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 172
• DOI: https://doi.org/10.1016/j.conbuildmat.2018.03.226
• Keywords: recycled tyre rubber, Liquid rubber, bitumen modification, storage stability, asphalt rubber, no-agitation wet process
• Public URL: https://nottingham-repository.worktribe.com/output/934673
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0950061818307256?via%3Dihub
• Contract Date: Jul 2, 2018