Effect of Jordanian Oil Shale Fly Ash on Asphalt Mixes

It is estimated that about 40 billion tons 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. The oil shale used in this study was 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 as a replacement of the mineral filler, material passing the 0.075 mm sieve, were prepared. The 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 improve d 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 the prepared samples.

  • Availability:
  • Authors:
    • Asi, Ibrahim
    • Assa'ad, Abdullah
  • Publication Date: 2005-10


  • English

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  • Accession Number: 01005806
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 10 2005 9:18AM