FORMATION AND EXPANSION OF ETTRINGITE CRYSTALS

The formation and expansion of ettringite crystals are discussed on the basis of principles of physico-chemistry. It is suggested that ettringite forms by a through-solution mechanism and that expansive force results from crystallization pressure as well as swelling pressure converted from the reduction of chemical potentials in the reaction of ettringite formation. Expansion depends mainly on the positions where ettringite crystals form. In a pore solution of high alkalinity, ettringite crystals form in situ and cause a large expansion. Alternately, they precipitate partially or completely in voids, thus giving rise to a little expansion or no expansion. (A)

  • Availability:
  • Corporate Authors:

    Pergamon Press, Incorporated

    Headington Hill Hall
    Oxford OX30BW,    
  • Authors:
    • MIN, DENG
    • MINGSHU, TANG
  • Publication Date: 1994

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00662499
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Jul 28 1994 12:00AM