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

Davide, Lo Presti and Abdul Hassan, Norhidayah and Airey, Gordon D. and Collop, Andrew (2013) Fundamental characterisation of reclaimed asphalts: the importance of testing homogeneous specimens. In: European Asphalt Technology Association Conference.

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Abstract

This study highlights the importance of defining appropriate specimen manufacturing procedures when assessing the fundamental properties of reclaimed asphalt 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 SMAs incorporating up to 30% of reclaimed asphalt but designed to have identical properties. A detailed characterisation of the loose mixes and binders, a X-Ray CT micro-structural study of the manufactured specimens and a further mechanical characterisation showed that testing nonhomogeneous gyratory specimens leads to a significant overestimation of the mechanical properties of asphalt mixes. This study has been developed within the FP7 project ReRoad.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:reclaimed asphalt, gyratory compactor
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Civil Engineering
ID Code:37755
Deposited By: Liza Porijo
Deposited On:14 Apr 2014 04:30
Last Modified:20 Sep 2017 08:08

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