Testing for Pyrrhotite
If you suspect your foundation may be showing signs of cracking, you should have your foundation tested by a VISUAL test and/or a CORE test.
The only test that can definitively confirm the presence of pyrrhotite is a CORE test.
Information provided by: Connecticut State Department of Housing
Visual Test
A visual assessment conducted by a licensed Professional Engineer (PE) leverages their expertise, gained through education, observation, and experience, to determine whether foundation cracking is likely caused by incompatible materials in the concrete mix. This comprehensive evaluation provides a detailed description of the concrete’s current condition, highlighting areas of concern and potential causes of damage. While the assessment offers valuable insights into the foundation’s present state, it is essential to note that it cannot predict future deterioration of uncracked areas. The PE’s expert opinion can, however, inform decisions regarding repairs, maintenance, and potential upgrades to ensure the foundation’s longevity and stability.
Core Test
A core test provides a definitive assessment of pyrrhotite presence and concentration in concrete. This process involves drilling a 4-inch diameter core sample from the concrete foundation, which is then sent to a laboratory for thorough analysis. After the sample is removed, the drilled area is plugged to maintain the foundation’s integrity. The test results offer crucial information on the extent of potential damage caused by pyrrhotite, enabling informed decisions on repairs, mitigation, and prevention of further deterioration.