EVALUATION OF CORE STRENGTH IN HIGH-STRENGTH CONCRETE

Resesarch is reported that attempted to correlate high strength concrete core strength to the strength of standard moist-air cured and field-cured cyliners. The details of the experimental program and results are described. The results showed that the in-situ strength as determined using drilled cores is less than that of moist-air cured and field-cured cylinders tested at the same age. At any given age, core strength is about 75 % of moist-air cured cyclinder strength, and about 85 % of field-cured cylinder strength. The data shows that for a column of concrete with a large cross-section area, coring location has little or no effect on core strength. The temperature at the center of a column with a large cross-sectional area is significantly higher than near the surface. For a concrete column with a large cross-sectional area, the core strength at the center is signifantly lower than that near the surface. It is noted that strength tests done on standard, moist-air cured cylinders are useful for quality control purposes and for checking the accpetability of the concrete as it is produced.

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• Corporate Authors:

  American Concrete Institute

  P.O. Box 19150, Redford Station, 22400 Seven Mile Road
  Detroit, MI  United States  48219
• Authors:
  • YUAN, R L
  • Ragab, M
  • Hill, R E
  • Cook, J E
• Publication Date: 1991-5

Media Info

• Features: Figures; Tables;
• Pagination: p. 30-34
• Serial:
  • Concrete International
  • Volume: 13
  • Issue Number: 5
  • Publisher: American Concrete Institute (ACI)
  • ISSN: 0162-4075

Subject/Index Terms

• TRT Terms: Acceptance tests; Columns; Concrete; Concrete curing; Cores (Specimens); Field tests; High strength concrete; Strength of materials; Testing
• Uncontrolled Terms: Concrete strength
• Old TRIS Terms: Cores; Insitu methods
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00608024
• Record Type: Publication
• Files: TRIS
• Created Date: May 31 1991 12:00AM