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Retardation of concrete due to zinc contamination

Thread starter ukshrimpers
Start date Oct 15, 2001

Status: Not open for further replies.

Oct 15, 2001

ukshrimpers

Materials

Has anyone any definitive data on maximum levels of zinc salts that can be tolerated in concrete before excessive retardation is encountered. We have a local limestone that contains zinc impurities in some seams and need to know when not to use the incomong material.