Lime was mixed with soil and allowed to mellow for seven to ten days. Conditioned Class F fly ash was then delivered in live bottom trailers.

 

A motor grader spread the ash evenly over the lime/soil mixture.

 

A CMI roto-tiller connected to a water truck delivered and mixed a measured amount of water to the ash/soil/lime mixture.

 

The water is mixed in such a way as to result in an approximately 9 inch layer after compaction. A sheep's-foot roller compacts the mix and then a layer of aggregate is paced prior to paving. This lime/ash mix was selected to achieve certain geo-technical properties at the project, to ensure uniformity.