Mar 16 2018 Typical cracking of pyrrhotite aggregate affected concrete of a house of portland cement and concrete in the United States through market

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How do pyrite and pyrrhotite damage building foundations

Pyrite and pyrrhotite are minerals known as iron sulfides Aggregates such as sand gravel crushed stone or other rocky material are used as fill In the United States pyrite induced swelling has been observed in Ohio West ia

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Pyrrhotite Wikipedia

Pyrrhotite is an iron sulfide mineral with the formula Fe 1 x S x 0 to 0 2 It is a nonstoichiometric variant of FeS the mineral known as troilite Pyrrhotite is also

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Pyrrhotite The mineral pyrrhotite information and pictures

Detailed description properties and locality information guide about the mineral pyrrhotite

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Part 1 Pyrrhotite Plague Is Killing The American Dream Hartford

May 28 2017 Part 1 Pyrrhotite Plague Is Killing The American Dream sprouting in the 1980s now make up a quarter of the town 39 s 2 000 housing units Precisely how many foundations contain Becker 39 s stone aggregate is unknown

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