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LIGHTWEIGHT MIXES: WORKING TO FORMULA

This paper describes a new method of mix design, suitable for all-lightweight and mixed lightweight and natural sand mixes. This method is a comprehensive technique, whose 8 steps are outlined; it can be applied over a wide range of concrete design strengths. Natural sand can be incorporated as replacement for all or part of the lightweight fine aggregate, depending on considerations of the maximum allowable concrete density and the desired economy. Small amounts of pulverised fuel ash and water-reducing admixtures can achieve the required consistency and workability. Concrete of specified strength can be produced, with much lower cement content than when existing mix design procedures are used, and with the desired fresh properties. Although the method was derived for two particular lightweight aggregates, the authors believe that it can be used for any lightweight aggregates having characteristics similar to those used. As with all mix design methods, the design charts and tables should be modified, as indicated by trial mixes, to take account of local materials. (TRRL)

  • Availability:
  • Corporate Authors:

    Morgan-Grampian (Construction Press) Limited

    Morgan-Grampian House, 30 Calderwood Street
    London SE18 6QH,   England 
  • Authors:
    • Dhir, R K
    • MUNDAY, JGL
    • Cheng, H T
  • Publication Date: 1989-6

Media Info

  • Pagination: p. 15,17-9
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00497819
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Sep 30 1990 12:00AM