Properties of blends of fresh and RAP binders with rejuvenator: Experimental and estimated results

• Published in: Construction & building materials 2020-03, Vol.236, p.117555, Article 117555
• Main Authors: Forton, A., Mangiafico, S., Sauzéat, C., Di Benedetto, H., Marc, P.
• Format: Article
• Language: English
• Subjects: Binder blending; Engineering Sciences; Estimations; RAP extracted binder; Rejuvenator; Steady-shear viscosity
• ISSN: 0950-0618; 1879-0526
• DOI: 10.1016/j.conbuildmat.2019.117555

•Properties of blends of two binders with and without rejuvenator were studied.•Steady-shear viscosity was calculated from complex modulus test results.•Strong correlations were found between penetration and other properties.•Properties of all blends were estimated from base constituents with two approaches.•Good correspondences were found between estimated and experimental results. The properties of various blends of a fresh binder (50/70 penetration grade) and a RAP-extracted binder, with and without a rejuvenator, were studied. A mixture of vegetal oils was used as rejuvenator in different dosages. A total of 17 binders were tested, including pure fresh and RAP binders. Conventional tests were performed in order to determine penetration at 25 °C, softening point (TR&B), Fraass breaking point (TFraass), ductility (elongation at 25 °C) and density at 25 °C. The steady-shear viscosity (η0) of all binders was calculated from complex modulus test results. Two different approaches were proposed in order to estimate values of penetration, TR&B, TFraass and η0 of blends from properties of base constituents. Excellent correspondences with experimental results were observed.