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research article

Cluster phenomenon and partial differential aging in RAP mixtures

Bressi, Sara  
•
Dumont, Andre-Gilles  
•
Pittet, Michel  
2015
Construction And Building Materials

The present study defines a procedure for gaining a better understanding of the interaction between the aged and the virgin binders and what actually occurs during a mix process. Indeed, the authors propose a methodology to determine and quantify the cluster phenomenon in mixtures containing RAP, defining how the aged binder interacts in the mix. Rheology, in particular the complex modulus, becomes the tool thanks to which it is possible to support the hypothesis of the composition of clusters of RAP particles surrounded by the virgin binder during the new mix production, considering different percentages of RAP. Moreover, the authors aim to establish the basis for the hypothesis of the existence of a partial differential aging: the RAP binder on the external surface (i.e. the crust around the aggregate) is more exposed td external factors and oxidation and is over-aged with respect to the binder under the crust that is more protected and less oxidated. (C) 2015 Elsevier Ltd. All rights reserved.

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Type
research article
DOI
10.1016/j.conbuildmat.2015.09.024
Web of Science ID

WOS:000364258100031

Author(s)
Bressi, Sara  
•
Dumont, Andre-Gilles  
•
Pittet, Michel  
Date Issued

2015

Publisher

Elsevier Sci Ltd

Published in
Construction And Building Materials
Volume

99

Start page

288

End page

297

Subjects

RAP

•

Cluster phenomenon

•

Aging

•

Complex modulus

•

Binder

•

Binder blend

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LAVOC  
Available on Infoscience
February 16, 2016
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/124040
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