RETARDATION EFFECT OF SUPERPLASTICIZER ON DIFFERENT CEMENT FRACTIONS

Cement hydration is a complex chemical process strongly influenced by the proportions of the various minerals present in the cement, admixtures, and the size of the cement particles. In this note, it is shown that naphthalene based superplasticizer, used at high dosage, does not affect the total heat of hydration but retards the hydration process of portland cement. This retardation, however, is most effective on a medium size fraction of the cement. The superplasticizer does not affect the hydration of the fine fraction to that extent due to its richer concentration of SO3 and alkalies. The coarse fraction of the cement does not participate (with or without superplasticizer) in the heat evolution process. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00088846
• Corporate Authors:

  Pergamon Press, Incorporated

  Maxwell House, Fairview Park
  Elmsford, NY  United States  10523
• Authors:
  • Aitcin, P-C
  • Regourd, M
  • Volant, D
• Publication Date: 1987-11

Media Info

• Features: References;
• Pagination: p. 995-999
• Serial:
  • Cement and Concrete Research
  • Volume: 17
  • Issue Number: 6
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Grain size (Geology); Heat; Hydration; Portland cement; Retarders (Concrete); Superplasticizers
• Old TRIS Terms: Heats, energies; Retarders
• ITRD Terms: 4758: Cement; 6743: Heat; 7195: Hydration; 6200: Particle size distribution; 4725: Plasticizer; 4727: Retarder (concrete)
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00470145
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Jul 31 1988 12:00AM