Investigation on the rheological behaviour and ageing characteristics of crumb rubber and polyurethane blends under dynamic shear conditions

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dc.authorid0000-0002-4872-154X
dc.authorid0000-0002-7496-6006
dc.authorid0000-0002-6389-4211
dc.contributor.authorKok, Baha Vural
dc.contributor.authorYalcin, Erkut
dc.contributor.authorOzdemir, Ahmet Munir
dc.contributor.authorOzdemir, Nisanur Gurcay
dc.date.accessioned2026-02-08T15:15:33Z
dc.date.available2026-02-08T15:15:33Z
dc.date.issued2025
dc.departmentBursa Teknik Üniversitesi
dc.description.abstractThis study aims to investigate the effects of the use of crumb rubber (CR) with polyurethane (PU) in bitumen modification on rheological and ageing properties. A novel modified palm-oil-based polyol was reacted with 4,40-diphenylmethane diisocyanate (MDI) to synthesise a polyurethane-derived polymer. Multiple stress creep recovery (MSCR), single point and frequency sweep tests were carried out. The analysis of the binders' viscoelastic behaviour was conducted using the Christensen-Anderson (CA) model. The complex viscosity was modelled using the Cross model. The low-temperature behaviour of the binders was determined by the bending beam rheometer (BBR) test, and the mixing-compaction temperatures were determined by the steady shear flow (SSF) method. Compared to single CR modification, the use of 4% PU in combination with 8% CR (8C + 4P) was found to broaden the relaxation spectrum, increase stiffness, improve shear-thinning resistance, and lead to a notable increase in resistance against ageing. Due to the polymeric networks developed in the 8C + 4P binder, it was determined that it exhibits superior elastic properties at high temperatures and also offers improved durability against low-temperature cracks. It was ascertained that the 8C + 4P binder demonstrated superior performance in both low- and high-temperature conditions compared to the 4% SBS modification, while there was no significant difference in terms of production temperatures.
dc.description.sponsorshipFimath;rat University Scientific Research Projects (FUBAP)
dc.description.sponsorshipThe study was founded as MF 24.12 by F & imath;rat University Scientific Research Projects (FUBAP).
dc.identifier.doi10.1080/10298436.2025.2553718
dc.identifier.issn1029-8436
dc.identifier.issn1477-268X
dc.identifier.issue1
dc.identifier.scopus2-s2.0-105016354784
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1080/10298436.2025.2553718
dc.identifier.urihttps://hdl.handle.net/20.500.12885/5846
dc.identifier.volume26
dc.identifier.wosWOS:001571893300001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherTaylor & Francis Ltd
dc.relation.ispartofInternational Journal of Pavement Engineering
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzWOS_KA_20260207
dc.subjectBitumen
dc.subjectmodification
dc.subjectageing
dc.subjectpolyurethane
dc.subjectcrumb rubber
dc.subjectmodelling
dc.titleInvestigation on the rheological behaviour and ageing characteristics of crumb rubber and polyurethane blends under dynamic shear conditions
dc.typeArticle

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