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The Association of Consulting Engineers Ireland (ACEI) have published, on 15th May 2014, an interim advice note on the presence of pyrite in masonry blocks stating:
“It has come to the attention of the ACE that there have been recent instances of apparent pyrite content in concrete blocks provided by block manufacturers.
In cases reported the affected blocks were noted to have a brown discoloration. The physical strength characteristics diminished over short period of time, particularly when exposed to moisture.
The ACEI are concerned about these occurrences and recommend all member firms request assurance from suppliers that materials are free of deleterious materials and that a representative sample of blocks be tested for pyrite content by chemical analysis.”
RIAI Guidance issued
An email sent to members of the The Royal Institute of The Architects of Ireland (RIAI) on the 29th May 2014 was posted on the Pyrite Action Facebook group and adds more detail to the pyrite problem
“A number of RIAI Practices have brought to the attention of the RIAI problems encountered on projects in the Leinster region with conrete blocks that contain pyrite.