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

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 61-64
• Serial:
  • Journal of Applied Chemistry & Biotechnology
  • Volume: 21
  • Issue Number: 3
  • Publisher: Society of Chemical Technology

Subject/Index Terms

• TRT Terms: Admixtures; Aggregates; Air entraining cement; Anions; Calcium; Cement paste; Ions; Portland cement; Surface active agents
• Old TRIS Terms: Adsorbed ions /aggregate formation/
• Subject Areas: Geotechnology; Highways; Materials;

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