AIR-ENTRAINING ACTIONS OF ANIONIC SURFACTANTS IN PORTLAND CEMENT PASTES

The air-entraining actions of a number of anionic surfactants in cement pastes were studied in order to determine whether precipitated calcium surfactants influence the air-entrainment process. Air contents of pastes containing both soluble and precipitated calcium surfactants were higher than those containing only soluble calcium surfactants, thus indicating that precipitated material contributed towards air-entrainment. It was shown further that the precipitated calcium surfactant could re-dissolve appreciably during mixing and supply additional surfactant ions in solution to replace those adsorbed on cement. It was concluded that these additional ions contributed to air- entrainment by further adsorption on cement particles and by augmenting the foam capacity of the mixing water. /IRRL/

  • Corporate Authors:

    SOCIETY OF CHEMICAL INDUSTRY

    14 BELGRAVE SQUARE
    LONDON,   United Kingdom  SW1X 8PS
  • Authors:
    • BRUERE, G M
  • Publication Date: 1971-3

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00081905
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Apr 22 1975 12:00AM