Iron Sulfides in Concrete
Oxidation of Iron Sulfide Minerals Iron sulfides are accessory minerals found in a variety of rock types, with pyrite (FeS2) and pyrrhotite (Fe1-xS) (x = 0 to 0.2), being most common. Under some conditions, these minerals can undergo oxidation reactions that have the...
The Top 10 Things to Tell Your Petrographer
If you want solid answers to your concrete questions, a petrographer can help. Petrographers use a combination of visual inspection, microscopy, and chemical techniques to examine concrete cores. These analyses provide a basis for understanding the condition of the...
What Can Petrographic Analysis Tell You About the Condition of Concrete Structures?
According to a 2013 Report Card for America’s Infrastructure, 1 in 9 bridges in metropolitan areas are structurally deficient. The estimated investment needed to eliminate the backlog of deficient bridges by 2028 is $20.5 billion annually—that’s $8 billion more per...
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