Investigations have been carried out of cements made from a combination of finely ground blastfurnace slag or synthetic granulate with untreated fly ash using sodium hydroxide solution as activator. Using a combination of 60% slag and 40% fly ash with 7% naoh (relative to combined weight of slag and ash) as activator, concrete has been prepared and tested for compressive strength up to an age of one year. Early strength properties were good but there was little gain in strength beyond 28 days though improved strength might be obtained by varying the proportions of slag and ash or by increasing the fineness of the slag. Whatever cements' of this type have to offer in the way of useful properties is unlikely to be outweighed by the difficulties of handling a strongly alkaline material on site, the risk of alkaline-aggregate reaction and the possibility of efflorescence. /Author/TRRL/

  • Corporate Authors:

    Cement and Concrete Association

    Wexham Spring
    Slough SL3 6PL, Buckinghamshire,   England 
  • Authors:
    • SMITH, M A
    • Osborne, G J
  • Publication Date: 1977-11-12

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: p. 223-224
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00174148
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Jul 29 1978 12:00AM