Evaluation of Solid Waste Materials for Highway Uses

This report is meant as a state of the art on utilization of solid waste material for road construction and maintenance. There are many waste materials, but in Minnesota three products are of prime interest because they are available in such large quantities. These are: Taconite Tailings, Fly Ash, and Boiler Slag

Much study has been done on some of these large volume materials. Some of the successful uses found for these products are embankment fill, subbase, base, stabilize for soil or aggregate, paving aggregate, and bituminous mix components.

This report undoubtedly is not the "last word" on the subject of solid waste utilization. Some materials or uses may have been overlooked or neglected, but it is hoped that the overall local state picture is well represented. This report has attempted to show that there are some large volume waste materials, there are bona fide uses for them, and utilization could be expanded with some effort. This also applies to lesser volume materials that sometimes aren't recognized as being usable.