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Pyrrhotite Foundation Repair- Pennsylvania

Some pyrrhotite in foundations could be OK

We are here to solve pyrrhotite problem in concrete

If pyrite or pyrrhotite are present in the rocks underneath buildings, the swelling can push on the foundation, walls, and basement floor of the building, causing cracks and other structural damage. In some cases, groundwater can then transport sulfates into the cracked foundation, causing further damage.
As they grow, the new sulfate minerals push against the surrounding rock, causing it to swell and crack. This causes damage in two main ways:
  • If pyrite or pyrrhotite are present in the rocks underneath buildings, the swelling can push on the foundation, walls, and basement floor of the building, causing cracks and other structural damage. In some cases, groundwater can then transport sulfates into the cracked foundation, causing further damage.
  • If pyrite or pyrrhotite is present in the aggregate material used to make concrete, the building material itself can be compromised. If water and air get into the concrete through small cracks and holes, the iron sulfides inside can begin to break down, cracking the concrete and allowing more air and water in, causing even more damage. This is a particular problem for concrete foundations and basements when water seeps in from the surrounding ground.
pyrrhotite problem
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