Field behaviour of cold-recycled asphalt mixtures for binder courses

Author(s): Andrea Grilli (1), Chiara Mignini (2) and Andrea Graziani
Paper category: Proceedings
Book title: Proceedings of the International Conference on Sustainable Materials, Systems and Structures (SMSS2019) New Generation of Construction Materials
Editor(s): Marijana Serdar, Nina Štirmer, John Provis
ISBN: 978-2-35158-217-6,
Vol 1. ISBN: 978-2-35158-223-7
e-ISBN: 978-2-35158-218-3
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 124-131
Total Pages: 8
Language : English

Abstract: A new awareness on sustainable materials and construction techniques is promoting field applications of cold bitumen emulsion mixtures. Cold in-plant recycling (CPR) techniques with bitumen emulsion ensure important benefits in terms of energy saving and amount of recycled materials while maximising the performance and production stability of mixtures. This study describes the construction of a pavement trial section where a cold-recycled asphalt mixture (CRAM) was placed as binder course. The CRAM was manufactured in-plant, using about 90% of reclaimed asphalt, bitumen emulsion and cement. The evolution of indirect tensile stiffness modulus (ITSM) was monitored on both laboratory-compacted specimens and cores extracted from the pavement.
From the analysis of results, it can be affirmed that the increase of ITSM due to the curing process was faster for laboratory specimens with respect to field cores. However, the long-term properties of the CRAM are expected to be very similar.

Online publication : 2019
Publication type : full_text
Public price (Euros) : 0.00