Materiales de Construcción, Vol 67, No 327 (2017)

Evaluation of bio-materials’ rejuvenating effect on binders for high-reclaimed asphalt content mixtures

A. Jiménez del Barco-Carrión, M. Pérez-Martínez, A. Themeli, D. Lo Presti, P. Marsac, S. Pouget, F. Hammoum, E. Chailleux, G. D. Airey

DOI: http://dx.doi.org/10.3989/mc.2017.04516

Abstract


The interest in using bio-materials in pavement engineering has grown significantly over the last decades due to environmental concerns about the use of non-recoverable natural resources. In this paper, bio-materials are used together with Reclaimed Asphalt (RA) to restore some of the properties of the aged bitumen present in mixtures with high RA content. For this purpose, two bio-materials are studied and compared to conventional and polymer modified bitumens. Blends of these materials with RA bitumen were produced and studied to simulate a 50% RA mixture. The rejuvenating effect of the two bio-materials on RA has been assessed and compared with the effect of the conventional binders. Apparent Molecular Weight Distribution of the samples (obtained by the ?-method) and different rheological parameters were used for this purpose. Results revealed the power of bio-materials to rejuvenate RA bitumen, showing their capability to be used as fresh binders in high-RA content mixtures.

Keywords


Bio-material; Reclaimed asphalt; High content; Rejuvenation; Rheology

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