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Stabilization of recycled base materials with high carbon fly ash

Author

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  • Cetin, Bora
  • Aydilek, Ahmet H.
  • Guney, Yucel

Abstract

Fly ashes produced by power plants in the United States occasionally contain significant amounts of unburned carbon due to common use of low nitrogen-oxide and sulphur-oxide burners in recent years. This ash cannot be reused in concrete production due to its reactivity with air entrainment admixtures and is being landfilled at large percentages. A study was conducted to stabilize low stiffness road surface material with high carbon fly ash. The non-cementitious fly ash was activated with another recycled material, lime kiln dust (LKD). California bearing ratio (CBR) and resilient modulus tests were conducted to determine the strength and stiffness, respectively, of the stabilized materials. Addition of LKD and curing of specimens generally increased CBR and summary resilient modulus (SMR), and lowered plastic strains, CBR increased with increasing CaO content as well as with CaO/SiO2 and CaO/(SiO2+Al2O3) ratio of the mixtures; however, these parameters could not be correlated with the SMR. The unpaved road materials stabilized with LKD and fly ash are expected to lose 31–67% of their initial moduli after 12 cycles of freezing and thawing. Lower base thicknesses and reduction in construction costs can be expected by stabilizing road surface materials with high carbon fly ash.

Suggested Citation

  • Cetin, Bora & Aydilek, Ahmet H. & Guney, Yucel, 2010. "Stabilization of recycled base materials with high carbon fly ash," Resources, Conservation & Recycling, Elsevier, vol. 54(11), pages 878-892.
    • Handle: RePEc:eee:recore:v:54:y:2010:i:11:p:878-892
    DOI: 10.1016/j.resconrec.2010.01.007
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    Citations

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    Cited by:

    1. Pugin Konstantin Georgievich & Gromov Igor Mihailovich, 2015. "The Effect of Operating Conditions on the Migration Activity of Pollutants from the Building Materials," Modern Applied Science, Canadian Center of Science and Education, vol. 9(9), pages 1-14, September.
    2. Cetin, Bora & Aydilek, Ahmet H., 2013. "pH and fly ash type effect on trace metal leaching from embankment soils," Resources, Conservation & Recycling, Elsevier, vol. 80(C), pages 107-117.
    3. Yang Zhang & Bora Cetin & Tuncer B. Edil, 2021. "Seasonal Performance Evaluation of Pavement Base Using Recycled Materials," Sustainability, MDPI, vol. 13(22), pages 1-15, November.
    4. Cetin, Bora & Aydilek, Ahmet H. & Guney, Yucel, 2012. "Leaching of trace metals from high carbon fly ash stabilized highway base layers," Resources, Conservation & Recycling, Elsevier, vol. 58(C), pages 8-17.

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