Influence Of Steam Curing On The Compressive Strength Of Concrete Containing Supplementary Cementing Materials

Heat treatment is widely used to accelerate the strength-gaining rate of concrete. However, the ultimate strengths of the heated-treated concrete are lower than those of the standard cured specimens. When ultrafine fly ash (UFA) is included in concrete, the pozzolanic reaction is accelerated through the heat treatment. This article reports on a study in which UFA and slag were used as a replacement for cement, and steam curing and chemical activators were used to accelerate hydration of cement and fly ash, and then compared with moist curing. The authors discuss the influence of steam curing on the compressive strength of concrete containing UFA with or without slag. Their results show that the compressive strength of concrete containing UFA through steam curing after demoulding is low, and that of 28 days is low also, which indicates that the steam-curing adaptability of UFA is poor. The chemical activators had a distinct effect on the early compressive strength after 13-h steam cure and had less effect on the 28-day compressive strength. The authors conclude that the addition of UFA and ground slag can increase the compressive strengths of concrete containing supplementary cementing materials and can solve the problem of lower strength gaining rate.

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  • Authors:
    • Liu, Baoju
    • Xie, Youjun
    • Li, Jian
  • Publication Date: 2005-5


  • English

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  • Accession Number: 01001401
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 28 2005 11:30AM