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To identify your needs or proceed with the elimination of pyrite, it is always interesting to compare with what has already been done.
What is pyrite?
Pyrite is a mineral that swells with the presence of water and moisture. When present under a concrete slab, it can cause the movement of it causing significant cracks and / or unevenness.
The solution against pyrite
When a presence of pyrite is observed, the most effective solution is to remove the concrete and backfill affected and then replace it with materials (concrete, crushed stone) free of pyrite. All according to the rules of art.
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