EFFECTS OF WITHHOLDING MIXING WATER AND RETEMPERING ON PROPERTIES OF CONCRETE

The effect of withholding mixing water at initial batching, followed by retempering of the mix at the job site on the properties of concrete, was investigated in an experimental program. The effect of redosage with water, in addition to the amount called for in the specified mix design, was also studied. Tests were conducted to determine the effects of the amount of water withheld, the age of concrete when retempered, and the cement content on the slump, air content, unit weight, flexural strength, compressive strength, abrasion resistance, and freeze/thaw resistance of concrete. Results indicate that signficant detrimental effects occur when mixing water is withheld and concrete is retempered at a the job site. Slump, air content, abrasion resistance, and freeze/thaw resistance are adversely affected. The effects were shown to be dependent on variations in both withholding time and cement content. Strength was not affected when water was withheld and the concrete was retempered using the withheld water, but a reduction in strength did accompany an increase in water-cement ratio above design values, resulting in reduced quality and questionable performance.

• Record URL:
  http://www.concrete.org/Publications/InternationalConcreteAbstractsPortal.aspx.aspx?m=details&i=888
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/13846872
• Corporate Authors:

  American Concrete Institute

  P.O. Box 19150, Redford Station, 22400 Seven Mile Road
  Detroit, MI  United States  48219
• Authors:
  • Anderson, S M
  • Carrasquillo, R L
• Publication Date: 1995-9

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 497-506
• Serial:
  • ACI Materials Journal
  • Volume: 92
  • Issue Number: 5
  • Publisher: American Concrete Institute (ACI)
  • ISSN: 0889-325X
  • Serial URL: https://www.concrete.org/publications/acimaterialsjournal.aspx

Subject/Index Terms

• TRT Terms: Abrasion resistance; Air content; Compressive strength; Concrete; Durability; Flexural strength; Freeze thaw durability; Properties of materials; Slump test; Tempering; Water cement ratio; Workability
• Uncontrolled Terms: Retempering
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00714657
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 26 1995 12:00AM