The U.S. Geological Survey has developed the first map of rock deposits exhibiting the potential to contain or form pyrrhotite, whose presence in otherwise ASTM C33 aggregate can prove extraordinarily deleterious in concrete. The map is part of a new fact sheet, “Pyrrhotite Distribution in the Conterminous United States,” publication of which abides a Congressional directive addressing widespread residential foundation failure cases in Connecticut and Massachusetts.
Read MoreThursday, April 25, 2024
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