Alkali Silica Reactivity Testing of Four Taconite Ledges for Potential Use as Aggregate in Concrete Status: CompleteReport Date: 07/28/2010 Summary: In response to a request from the Natural Resources Research Institute, Mn/DOT tested four taconite ledges, which may have the potential to be used in concrete, for alkali silica reactivity according to ASTM C 1293, Standard Test Method for Determination of Length of Change Due to Alkali Silica Reaction, and ASTM C 1260, Standard Test Method for Potential Alkali Reactivity of Aggregates. The results of the tests are detailed in this report. Final Deliverables: Report #2010-29 Related Materials: Related Research: