REVIEW OF THE MECHANICS OF SET-RETARDATION IN PORTLAND CEMENT PASTES CONTAINING ORGANIC ADMIXTURES

VARIOUS MECHANISMS HAVE BEEN PROPOSED TO EXPLAIN HOW ORGANIC ADMIXTURES AFFECT THE HYDRATION OF CEMENT CLINKER COMPOUNDS. THESE ARE REVIEWED AND DISCUSSED CRITICALLY. COMPLEX FORMATION BETWEEN THE ORGANIC COMPOUNDS AND ALUMINATE OR SILICATE IONS MAY ENHANCE THE INITIAL REACTIVITY OF THE ANHYDROUS COMPOUNDS. SET-RETARDATION MAY BE PRIMARILY DUE TO RETARDING OF THE HYDRATION OF TRICALCIUM SILICATE THROUGH THE ADSORPTION OF ORGANIC ADMIXTURES ONTO CALCIUM HYDROXIDE NUCLEI. ADSORPTION ONTO THE INITIAL HYDRATION PRODUCTS OF TRICALCIUM ALUMINATE CAN ALSO RETARD FURTHER HYDRATION. /AUTHOR/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00088846
• Authors:
  • Young, J F
• Publication Date: 1972-7

Media Info

• Pagination: p. 45-33
• Serial:
  • Cement and Concrete Research
  • Volume: 2
  • Issue Number: 4
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Hydration; Organic compounds; Portland cement concrete; Setting (Concrete)
• Uncontrolled Terms: Setting time
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00214168
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 31 1972 12:00AM