alexa Evaluation of Combined Excavation Waste and Reclaimed A
ISSN: 2165-784X

Journal of Civil & Environmental Engineering
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Research Article

Evaluation of Combined Excavation Waste and Reclaimed Asphalt Pavement Aggregates for Use in Road Bases and Sub-bases

Ramzi Taha1*, Okan Sirin1 and Husam Sadek1,2
1 Department of Civil & Architectural Engineering, Qatar University, Doha, Qatar
2 Centre for Engineering Sustainability, University of Liverpool, Liverpool, UK
Corresponding Author : Ramzi Taha
Department of Civil and Architectural Engineering
Qatar University, P.O. Box 2713, Doha, Qatar
Tel: + 97444034118
E-mail: [email protected]
Received January 29, 2014; Accepted March 27, 2014; Published April 04, 2014
Citation: Taha R, Sirin O, Sadek H (2014) Evaluation of Combined Excavation Waste and Reclaimed Asphalt Pavement Aggregates for Use in Road Bases and Sub-bases. J Civil Environ Eng 4:141. doi: 10.4172/2165-784X.1000141
Copyright: © 2014 Taha R, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


More than 15 million tons of aggregates are imported each year to Qatar from neighbouring countries. Large quantities of waste materials (around 20 million tons/year) from excavation waste, demolition rubble and reclaimed asphalt pavement (RAP) are being generated. The main objective of this paper is to present the results on the use of combined excavation waste (EW) and RAP aggregates in the construction of road bases and sub-bases. Physical and chemical properties were determined. Different combinations of both materials were subjected to compaction and California Bearing Ratio (CBR) testing in accordance with Qatar Construction Specifications. Results indicated that, for the materials tested, it is not feasible to use excavation waste, RAP aggregates or a combination of the two materials in road bases and sub-bases. The materials failed to meet some Qatari standards such as Los Angeles abrasion, liquid limit, plasticity index and CBR specified for road construction.


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