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Materials and Structures

, Volume 47, Issue 9, pp 1425–1450 | Cite as

Laboratory study of the effect of RAP conditioning on the mechanical properties of hot mix asphalt containing RAP

Original Article

Abstract

This paper evaluates the effect of reclaimed asphalt pavement (RAP) laboratory conditioning on the rheological properties of recycled hot-mix asphalt. Four different conditioning processes were used on a single RAP source before mixing: unheated RAP, RAP heated at 110 °C in a microwave, RAP heated in a covered pan at 110 °C in a draft oven, and RAP heated in a non-covered pan at 110 °C in a draft oven. Dense graded 20 mm HMA was designed using a PG 64-28 binder and mixed with 25 % of the four different conditioned RAPs. Thermal stress restrained specimen test (TSRST) and complex modulus test were used to characterize RAP conditioning effect. Test results showed that the complex modulus of the four mixes has no different rheological behaviour, and did not affect TSRST results as much.

Keywords

Reclaimed asphalt pavement Recycling Binders Complex modulus TSRST RAP conditioning 

Notes

Acknowledgments

This work was funded by the Missions Sectors in Egypt and the École de Technologie Supérieure. The authors would like to thank the companies in Quebec that provided us with the materials and with all the needed data for the project.

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Copyright information

© RILEM 2013

Authors and Affiliations

  1. 1.Département du Génie de la ConstructionÉcole de Technologie SupérieureMontrealCanada

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