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Effect of mixing time on reclaimed asphalt mixtures: An investigation by means of imaging techniques

Abdul Hassan, Norhidayah and Khan, Rawid and Raaberg, J. and Lo Presti, Davide (2015) Effect of mixing time on reclaimed asphalt mixtures: An investigation by means of imaging techniques. Construction And Building Materials, 99 . pp. 54-61. ISSN 0950-0618

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Official URL: http://dx.doi.org/10.1016/j.conbuildmat.2015.09.00...


This paper presents an application of imaging techniques to investigate the distribution of reclaimed asphalt and air voids within gyratory compacted specimen. Stone Mastic Asphalt specimens containing reclaimed asphalt, were produced at five different laboratories participating in the collaborative project Re-Road: University of Nottingham, Belgium Road Research Centre, Danish Road Directorate, TU Braunschweig and Laboratoire Centrale de Ponts et Chaussees (now IFSTTAR). This study applies the X-ray Computed Tomography and Optical Microscopy techniques to view the internal structure of the specimen with particular focus on the air voids and reclaimed asphalt distributions within the specimen. The observations revealed that with doubling the mixing time the reclaimed asphalt is well mixed with the fresh materials within the gyratory compacted specimen and also the air voids distribution along the specimen height result to be more consistent.

Item Type:Article
Uncontrolled Keywords:gyratory compaction, optical microscopy, reclaimed asphalt, X-ray CT
Subjects:A General Works
ID Code:58377
Deposited By: Haliza Zainal
Deposited On:04 Dec 2016 12:07
Last Modified:11 Apr 2017 16:23

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