THE EFFECT OF EXCESSIVE STEAM CURING ON PORTLAND COMPOSITE CEMENT CONCRETE

Atmospheric steam curing is a heat process which is used to accelerate the strength development of concrete products, including high early strength values in precast concrete production. Cement type, as well as curing period and temperature, is an important parameter in the steam-curing process. This article reports on a study of PC42.5, the type of cement that is most commonly used in Turkish precast concrete plants. Its behavior is well known, but this study investigated the properties of cement type as a binder (PKC/A42.5) comparatively with conventional PC42.5 under steam curing. For this purpose, 15-cm concrete cubes were prepared with a water/cement ratio (w/c) of 0.44 and were subjected to steam curing for five different curing periods of 4, 8, 16, 24 and 36 h under curing temperatures of 65 and 85 deg C. Cement dosage was kept constant (400 kg/m3) for all specimens. The authors report that their test results indicated that Portland composite cement (PKC/A42.5) can be used in place of PC42.5 for steam curing at atmospheric pressure in precast concrete production. They caution that in the case of early high strength demand for early demolding purposes, curing temperature should be increased to 85 deg C. for PKC/A42.5 cement concretes.

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• Corporate Authors:

  Elsevier

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  Kidlington, Oxford  United Kingdom  OX5 1GB
• Authors:
  • Turkel, S
  • Alabas, V
• Publication Date: 2005-2

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 405-411
• Serial:
  • Cement and Concrete Research
  • Volume: 35
  • Issue Number: 2
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Atmospheric pressure; Compressive strength; Portland cement concrete; Precast concrete; Steam curing; Water cement ratio
• Geographic Terms: Turkey
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00989040
• Record Type: Publication
• Files: TRIS
• Created Date: May 2 2005 12:00AM