THE VACUUM HANDLING OF CONCRETE - A SINGLE PROCEDURE

AUS EINEM GUSS. DIE VAKUUMBEHANDLUNG VON BETON

The preparation of concrete surfaces using rigid vacuum plates has hitherto had many shortcomings. A method is described in which concrete surfaces subjected to traffic loadings are produced using a vacuum carpet. The concrete, which is placed in the normal way for a consistency range between k2 and k3, and vibrated internally, is compacted with a finishing tool in 4 to 6 metre (in exceptional cases up to 16 metre) wide sections. Filter mats with a filter web on their underside are placed on the concrete and water is sucked out into a vacuum pump by reducing the atmospheric pressure about 80 to 90 per cent. Within twenty minutes the water:cement ratio is reduced by ten to twenty-five per cent. The top surface which is then smoothed, can be subjected to full traffic loading three days later. Further information is given concerning the finishing operation, attainable improvements in strength, wearing resistance and in resistance to frost and road salts and the tendency towards cracking. /TRRL/

  • Corporate Authors:

    Bauverlag GmbH

    Wittelbacherstrasse 10
    6200 Wiesbaden,   Germany 
  • Authors:
    • Zantz, E
  • Publication Date: 1975-3

Language

  • German

Media Info

  • Features: Figures; Tables;
  • Pagination: p. 289-92
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00183641
  • Record Type: Publication
  • Source Agency: Bundesanstalt für Straßenwesen (BASt)
  • Files: ITRD, TRIS
  • Created Date: Dec 29 1978 12:00AM