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Fundamental characterisation of reclaimed asphalts: the importance of testing homogeneous specimens

Lo Presti, D.; Hassan, N.A.; Airey, G.; Collop, A.

Authors

D. Lo Presti

N.A. Hassan

GORDON AIREY GORDON.AIREY@NOTTINGHAM.AC.UK
Professor of Pavement Engineering Materials

A. Collop



Abstract

This study highlights the importance of defining appropriate specimen manufacturing procedures when assessing the fundamental properties of reclaimed asphalt (RA) mixes for further modelling purposes. Two gyratory compactor procedures were used: the first leading to specimens with a non-uniform air voids distribution and the second tailored to obtain homogeneous specimens. The study was performed by using three stone mastic asphalts incorporating up to 30% of RA but designed to have identical properties. A detailed characterisation of the loose mixes and binders, an X-ray computer tomography micro-structural study of the manufactured specimens and a further mechanical characterisation showed that testing non-homogeneous gyratory specimens leads to a significant overestimation of the mechanical properties of asphalt mixes. This study has been developed within the FP7 project ReRoad. © 2013 Copyright Taylor and Francis Group, LLC.

Journal Article Type Article
Publication Date May 22, 2013
Print ISSN 1468-0629
Publisher Taylor & Francis
Peer Reviewed Peer Reviewed
Volume 14
Issue SUPPL.1
Pages 120-131
APA6 Citation Lo Presti, D., Hassan, N., Airey, G., & Collop, A. (2013). Fundamental characterisation of reclaimed asphalts: the importance of testing homogeneous specimens. Road Materials and Pavement Design, 14(SUPPL.1), 120-131. doi:10.1080/14680629.2013.774750
DOI https://doi.org/10.1080/14680629.2013.774750
Keywords gyratory compactor; reclaimed asphalt; ReRoad; X-ray CT; Fundamental properties; Gyratory compactor; Manufacturing procedure; Mechanical characterisation; ReRoad; Stone mastic asphalts; X-ray computer tomography; X-ray CT; Computerized tomography; Mechani
Publisher URL https://www.tandfonline.com/doi/abs/10.1080/14680629.2013.774750
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