PREDICTING THE 28-DAY STRENGTH OF PORTLAND CEMENT CONCRETE BY NUCLEAR DENSITIES

The report covers a preliminary investigation into the possible use of concrete nuclear densities as a substitute for 28-day concrete specifications. During the investigation five variables (slump, entrained air, cylinder strength, core strength and nuclear density) from three previously constructed concrete pavement projects were evaluated. The evaluation indicated that there existed a high correlation between cylinder strength, core strength and nuclear density. The confidence limits were too great to allow nuclear density readings to replace the 28-day cylinder strength requirements. The study recommended further research to incorporate a density requirement as a construction control of consolidation and not of concrete strength.

• Supplemental Notes:
  • Prepared in cooperation with the Federal Highway Administration, Washington, D.C.
• Corporate Authors:

  Utah Department of Transportation

  Materials and Research Section, 757 West Second South
  Salt Lake City, UT  United States  84114

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • McBride, J C
• Publication Date: 1976-11

Media Info

• Pagination: 31 p.

Subject/Index Terms

• TRT Terms: Accelerated tests; Air entrained concrete; Air entrainment; Compressive strength; Concrete pavements; Consolidations; Cores (Specimens); Forecasting; Nuclear tests; Portland cement concrete; Quality control; Slump test; Specifications; Strength of materials
• Uncontrolled Terms: Slumps
• Old TRIS Terms: Cores; Slumping
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00166498
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: UDOT-MIR-77-1 Final Rpt.
• Files: NTIS, TRIS, USDOT, STATEDOT
• Created Date: Oct 29 1978 12:00AM