The value of the din flow table, used to assess the workability of high workability concrete, is considered. The method has no theoretical basis and is the result of an empirical approach to the problem. The method and apparatus, the subject of a German specification, are described in detail. The authors show that there are several deficiencies in definition that are likely to lead to operator error. A satisfactory measure of the bulk properties cannot be obtained because the definition of the final spread gives a thickness approximately equal to the maximum aggregate size. Tests have also shown that there is a high correlation between the initial and final spreads; in fact the initial spread may be more sensitive to differences between mixes. Although the din test indicates whether a concrete is likely to segregate this can be shown by a much simpler test. It is concluded that the din test cannot give any better information than the slump test, which is in itself a single-point test and cannot give an adequate description of workability. /TRRL/

  • Availability:
  • Corporate Authors:

    Cement and Concrete Association

    Wexham Spring
    Slough SL3 6PL, Buckinghamshire,   England 
  • Authors:
    • Dimond, C R
    • Bloomer, S J
  • Publication Date: 1977-12

Media Info

  • Features: Figures; References;
  • Pagination: p. 29-30
  • Serial:
    • Volume: 11
    • Issue Number: 12
    • ISSN: 0010-5317

Subject/Index Terms

Filing Info

  • Accession Number: 00174067
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Jun 28 1978 12:00AM