Utilization of byproducts is becoming a common method to improve the ride quality and structural capacity of roads. Use of self-cementitious fly ash in stabilizing the existing roads (gravel roads or recycled paved roads) to form a stable base for hot mixed asphalt layer is of great interest as this reconstruction approach costs significantly less compared to traditional reconstruction where road surface materials are replaced with new aggregate base (estimated to be 1/3 of the traditional total reconstruction), more rapid and convenient. This report reviews the data collected at these two sites as well as other fly ash stabilization projects that the investigators monitored in Wisconsin to arrive at some general observations and conclusions.
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