Effect of Jordanian Oil Shale Fly Ash on Asphalt Mixes
Publication: Journal of Materials in Civil Engineering
Volume 17, Issue 5
Abstract
It is estimated that about of oil shale is available in the southern part of Jordan. Several studies are being carried out to utilize this source of energy efficiently. Upon direct combustion of this oil shale, more than 50% of its quantity will be left as fly ash. Resulting fly ash is considered undesirable and environmentally hazardous. This investigation was conducted to make use of the fly ash in the modification of local asphalt mixes. The modification efficiency was evaluated by the improvement in the performance of prepared asphalt concrete mixes. To carry out this study, enough quantity of oil shale was collected from Al-Lajjoun quarries (about south of Amman, Jordan). This material was then crushed, sieved, and burned to obtain the fly ash. Chemical and physical analyses of the fly ash were then performed. Asphalt concrete mixes having different percentages of fly ash (0, 10, 50, and 100%) as a replacement of the mineral filler, material passing the sieve, were prepared. These samples were characterized using the Marshall Stability, indirect tensile strength, stripping resistance, resilient modulus, dynamic creep, fatigue, and rutting tests. Test results were statistically analyzed and indicated that, in general, the addition of fly ash improved both strength, and water sensitivity of the asphalt concrete mixes. Replacing 10% of the mineral filler by fly ash proved to be the most effective percentage in improving the mechanical properties of all the prepared samples.
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Acknowledgments
The writers would like to acknowledge the support of the College of Graduate Studies and Scientific Research at Hashemite University for funding this research study. Thanks are extended to Eng. Mazen Al-Zou’bi, for his assistance during the experimental work.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 17 • Issue 5 • October 2005
Pages: 553 - 559
Copyright
© 2005 ASCE.
History
Received: Mar 23, 2004
Accepted: Dec 28, 2004
Published online: Oct 1, 2005
Published in print: Oct 2005
Notes
Note. Associate Editor: Louay N. Mohammad
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