Evaluation of the Use of Power Plant Pond Ash in Highway Construction, February 1992.

摘要

The objective of the study was 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 materials 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 the 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. Rideability of all sections is good and is typical of this type surfacing.