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. /AUTHOR/

  • Supplemental Notes:
    • Vol 21, No 3, PP 61-64
  • Corporate Authors:

    J Applied Chemistry & Biotechnology

    ,    
  • Publication Date: 1971-3

Subject/Index Terms

Filing Info

  • Accession Number: 00213927
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 29 1971 12:00AM