A NEW PROCEDURE FOR ASCERTAINING THE DURABILITY OF CONCRETE SUBJECTED TO FROST AND DE-ICING SALT

EIN NEUES VERFAHREN ZUR ERZIELUNG DER FROST-TAUSALZ-BESTAENDIGKEIT DES BETONS 331A3 SOMMER, H

The forst-salt-durability of concrete could previously only be positively ascertained by the use of air-entraining agents. The chemical industry has manufactured plastic micro-cavity spheres of only 10 to 60 my diameter, which can be mixed in the concrete in place of the air-entrainer. The micro-cavity spheres make the concrete just as stable when subjected to frost and salt as artificial air pores, when they are added at a rate equivalent to 2.8% of the cement aggregate volume, i.e. In the case of concrete for highway purposes 0.7 to 0.8 per cent by volume according to the cement content. The content of micro-cavity spheres in new concrete can be easily obtained by washing out. 0.7% of micro-cavity spheres plasticize the concrete to about the same extent as synthesized air pores but die to their smaller volume produce a basically higher strength of concrete.

  • Publication Date: 1977

Language

  • German

Media Info

  • Features: Figures; Photos; References;
  • Pagination: p. 124-9
  • Serial:
    • Zement und Beton
    • Volume: 22
    • Issue Number: 4
    • Publisher: Verein de Oesterreich Zementfab & Oester Beton

Subject/Index Terms

Filing Info

  • Accession Number: 00195209
  • Record Type: Publication
  • Source Agency: Bundesanstalt für Straßenwesen (BASt)
  • Files: ITRD, TRIS
  • Created Date: Aug 28 1979 12:00AM