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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Recycling of Local Qatar’s Steel Slag and Gravel Deposits in Road Construction
Husam Sadek
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DOI:10.17265/1934-7359/2024.08.005
Department of Civil and Architectural Engineering, College of Engineering, Qatar University, Doha 2713, Qatar
Every year, the State of Qatar generates about 400,000 tons of steel slag and another 500,000 tons of gravel as a result of steel manufacturing and washing sand, respectively. The two materials (by-products) are not fully utilized to their best market values. At the same time, infrastructural renewal will take place in Qatar over the next ten years, and there will be a greater demand for aggregates and other construction materials as the country suffers from the availability of good aggregates. This paper presents results obtained on the use of steel slag, gravel and gabbro (control) in HMAC (hot mix asphalt concrete) paving mixtures and road bases and sub-bases. Tests were conducted in accordance with QCS-2010 (Qatar Construction Specifications) and results were compared with QCS requirements for aggregates used in these applications. Based on the data obtained in this work, steel slag and gravel aggregates have a promising potential to be used in HMAC paving mixtures on Qatar’s roads, whether in asphalt base and asphalt wearing courses or as unbound aggregates in the base and sub-base pavement structure.
Steel slag, gravel, by-products, asphalt concrete, sub-base, Qatar.
Journal of Civil Engineering and Architecture 18 (2024) 403-414 doi: 10.17265/1934-7359/2024.08.005
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