Abstract
Combustion of heavy fuel oil at power generation facilities and desalination plants produce large quantities of heavy oil fly ash (OFA). Waste ash production is expected to increase with the increasing use of heavy or cracked oil as fuel in inefficient power generation facilities. Oil ash can pose a health hazard by affecting the respiratory system and may contaminate the water table if improperly dumped. Utilization of the heavy oil ash in construction materials provides a viable use for this by-product, thereby protecting the environment and eliminating the need for building special disposal areas for the ash. In this study, three different chemical treatment methods were used for the surface modification of oil fly ash. Elemental analysis indicated that the treatment process removes some of the elements such as vanadium, iron, and nickel from the OFA samples. FTIR analysis shows that the main difference between the three treatment methods is the introduction of three different functional groups. Untreated and surface-modified oil fly ash were blended with asphalt binder at a ratio of 2 % and used in asphalt concrete mixes. Performance grade of ash modified asphalt binders increased from 64–16 to 76–16. Asphalt concrete mixes modified with chemically treated OFA has 11 % higher split tensile strength, 25 % higher resilient modulus, 1,400 % increase in fatigue life and 55 % reduction in rutting as compared to neat asphalt concrete mix treated with the same asphalt content. Modifying asphalt binder with 2 % of chemically treated OFA significantly improves the performance of the asphalt pavement.
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References
American Coal Ash Association (2011) Coal combustion product (CCP) production & use survey report. AACA, Farmington Hills
Woo-Teck K, Dong-Hyun K, Yung-Phil K (2005) Characterization of heavy oil fly ash generated from a power plant. AZ J Mater Online. doi:10.2240/azojomo0135
Abu-Rizaiza AS (2004) Characteristics of fly ash from residual oil combustion at Rabigh Electric Power Plant. J Environ Sci, Inst Environ Stud Res 8(2):349–369
Daous MA (2004) Utilization of cement kiln dust and fly ash in cement blends in Saudi Arabia. J King Abdulaziz Univ: Eng Sci 15(1):33–45
Shawabkeh R, Khan MJ, Al-Juhani AA, Al-Abdul Wahhab HI, Hussein IA (2011) Enhancement of surface properties of oil fly ash by chemical treatment. Appl Surf Sci 258:1643–1650
Al-Amethel M, Al-Abdul Wahhab HI, Hussein IA (2011) Utilization of heavy oil fly ash to improve asphalt binder and asphalt concrete performance. Patent US 8062413 B1
Hussein IA, Iqbal MH, Al-Abdul Wahhab HI (2005) Influence of Mw of LDPE and vinyl acetate content of EVA on the Rheology of Polymer Modified Asphalt. Rheologica Acta 45(1):92–105
Iqbal MH, Hussein IA, Al-Abdul Wahhab HI, Amin B (2006) Rheological investigation of the influence of acrylate polymers on the modification of asphalt. J Appl Polym Sci 102(4):3446–3456
Abbasi S, Adesina A, Atieh M, Ul-Hamid A, Hussein IA (2013) Rheology, mechanical and thermal properties of (C18-CNT/LDPE) nanocomposites. Int Polym Process 28(1):3–13
Coates J (2000) Interpretation of infrared spectra: a practical approach in encyclopedia of analytical chemistry, Chichester, John Wiley & Sons Ltd, pp 10815–10837
Al-Abdul Wahhab HI, Hussein IA, Shawabkeh R (2013) Treatment of waste oil fly ash for improvement of saudi asphalt binder and asphalt concrete performance, KACST, Riyadh, Saudi Arabia
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The authors acknowledge the supports provided by King Abdul Aziz City for Science and Technology (KACST) project AR-29-101 and King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia.
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Al-Abdul Wahhab, H.I., Hussein, I.A., Parvez, M.A. et al. Use of modified oil fly ash to enhance asphalt concrete performance. Mater Struct 48, 3231–3240 (2015). https://doi.org/10.1617/s11527-014-0393-5
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DOI: https://doi.org/10.1617/s11527-014-0393-5