THE REACTION OF FLY ASH IN CONCRETE. A CRITICAL EXAMINATION

It is a well known fact that the reaction of fly ash in concrete, only starts significantly after one or more weeks. Until this period the fly ash behaves more or less as an inert material, which only serves as a precipitation nucleus for ca(oh)2 and c-s-h gel originating from the cement hydration. After the initiation of the pozzolanic reaction of the fly ash, the cement paste will become increasingly denser. This paper gives a critical examination of the "why" of this "incubation period", it presents a model for the formation of pozzolanic reaction products and discusses the development of the pore structure. (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:
  • FRAAY, ALA
  • BIJEN, J M
  • De Haan, Y M
• Publication Date: 1989-3

Media Info

• Features: References;
• Pagination: p. 235-246
• Serial:
  • Cement and Concrete Research
  • Volume: 19
  • Issue Number: 2
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Cement paste; Chemical reactions; Concrete curing; Fly ash; Porosity; Pozzolan
• ITRD Terms: 4767: Cement paste; 4702: Curing (concrete); 4580: Fly ash; 5938: Porosity; 4185: Pozzolan; 7156: Reaction (chem)
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00493514
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Apr 30 1990 12:00AM