HEXAVALENT CHROMIUM IN PORTLAND CEMENT

Hexavalent chromium is a carcinogen found in varying quantities in Portland cement. Its release into the air and groundwater is closely regulated and controlled by governments at the state and federal levels. Soluble chromium also has been linked to chromate-sensitive dermatitis of workers exposed to wet cement and concrete. Scandinavian countries have limited the amount of hexavalent chromium allowed in Portland cement. This paper examines the process by which hexavalent chromium is reduced in mixtures and the developments in this area. Ferrous sulfate, a chemical reducing agent, is commonly used in the reduction process; however, a California cement plant failed in its full-scale attempt to reduce chromium due to oxidation of the ferrous iron. Further research is necessary to develop better methods for introducing ferrous sulfate into the cement.

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  • Corporate Authors:

    American Society for Testing and Materials (ASTM)

    100 Barr Harbor Drive, P.O. Box C700
    West Conshohocken, PA  United States  19428-2957
  • Authors:
    • Klemm, W A
  • Publication Date: 1994-6

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00664762
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 25 1994 12:00AM