AN EVALUATION OF THE USE OF POWER PLANT POND ASH IN HIGHWAY CONSTRUCTION. FINAL REPORT

The objective of this study is to evaluate the use of power plant pond ash (coal ash) for use as a base course material. The pond ash contains both fly ash and bottom ash that have been codisposed of by sluicing to a disposal pond. Test sections included various combinations of fine and coarse ash with a sand-clay granular material treated with different amounts of portland cement or hydrated lime. A control section was constructed by mechanically stabilizing the sand-clay granular material with washed gravel. All sections received a double bituminous surface treatment as the wearing course. The project was constructed in the Fall of 1987 and this report documents the performance for the ensuing three years. Performance measurements consisted of deflection measurements, distress and rideability surveys, and unconfined compressive strengths of drilled cores. All the test sections and the control section have given good performance through three years of service. No significant distress has been observed in any of the sections. Rideabiliy of all sections is good and is typical of this type surfacing. Deflection measurements indicate that all the test sections, with the exception of the one utilizing 2% hydrated lime, have better structural characteristics than the control section. The test section with 2% hydrated lime is slightly weaker than the control section. Unconfined compression test of drilled cores indicates excellent strength with the exception of the section with 2% hydrated lime.

  • Corporate Authors:

    Mississippi State Highway Department

    Research and Development Division, P.O. Box 1850
    Jackson, MI  United States  39215

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Crawley, A B
  • Publication Date: 1992-2

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 18 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00620558
  • Record Type: Publication
  • Report/Paper Numbers: MSHD-RD-92-085, State Study No. 85
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Mar 31 1992 12:00AM