Using Fly Ash to Improve Recycled Pavement Foundations

Status:  Complete
Report Date:  09/22/2009


Researchers evaluated the strength, stiffness and performance of fly ash-stabilized recycled pavement materials both in the laboratory and in the field, and found that their resilient modulus increased significantly with fly ash content and remained stable even over numerous freeze-thaw cycles. They used these results to create design procedures establishing a gravel equivalency to Class 5 base course. Researchers also evaluated the environmental impacts of these materials and found that groundwater concentrations of leachates would be expected to meet environmental standards.

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