Utilization of Reclaimed Asphalt Pavements in Indian Low-Volume Roads
Publication: Journal of Materials in Civil Engineering
Volume 28, Issue 2
Abstract
Utilization of reclaimed asphalt pavement (RAP) in the construction industry is gaining an advantage over conventional materials in terms of sustainable credits. However, the amount of production of RAP and its utilization has no comparison. The general practice is to replace a small fraction of virgin aggregates with RAP, usually restricted to a maximum of 30%, in base layers to promote RAP usage in the pavement industry. The present study focuses on the utilization of a high proportion of RAP () substitution in virgin aggregates (VA) as a base material in low volume roads (LVR). Mixes containing , , and proportions of stabilized with different dosages of fly ash were evaluated for maximum dry density (MDD), optimum moisture content (OMC), unconfined compressive strength (UCS), resilient modulus () and California bearing ratio (CBR). It was observed that the design mix with 40% fly ash meets the design requirements ( and ) specified by the Ministry of Rural Development (MoRD), Government of India, and was considered to be an optimum mix. An example is discussed to design an LVR with an optimum mix according to the Indian Roads Congress (IRC) and AASHTO methods. The results revealed that the fatigue and rutting strains are well within the permissible limits for the new mix. The new mix design proved economical, as there was a 50% reduction in base layer thickness compared with the conventional design mix.
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Acknowledgments
The authors would like to thank the Technology Systems Development program of the Department of Science and Technology, Government of India, for providing financial assistance to carry out this project. The authors would also like to thank M/S Neyveli Lignite Corporation for their support in supplying fly ash for this research study. The authors acknowledge Ms. Anu M. George for her support and assistance with the work.
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Information & Authors
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Published In
Journal of Materials in Civil Engineering
Volume 28 • Issue 2 • February 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Oct 7, 2014
Accepted: May 6, 2015
Published online: Jul 16, 2015
Discussion open until: Dec 16, 2015
Published in print: Feb 1, 2016
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