Research Using Waste Shingles for Stabilization or Dust Control for Gravel Roads and ShouldersStatus: CompleteReport Date: 02/04/2014 Summary: It is estimated that Minnesota generates more than 200,000 tons of shingle waste each year. Recently, a portion of this waste has been incorporated into hot-mixed asphalt (HMA) pavement mixtures. The current technology limits the amount of recycled asphalt shingles (RSA) in HMA to no more than 5 percent by weight. This leaves a lot of underutilized shingle waste material. This has prompted MnDOT to investigate other potential uses for RAS. One potential use is to improve the performance of gravel surfacing and reduce dust by replacing common additives, such as calcium chlorides, with RAS. Final Deliverables: Report #2014-06 Research Summary Related Materials: Related Research: