STATE OF THE ART IN USE OF NUCLEAR DENSITY GAGES ON PORTLAND CEMENT CONCRETE

Proper consolidation during construction improves all of the important properties of portland cement concrete. The state of the art in state highway department use of commercially available, static nuclear density gages to monitor concrete consolidation is discussed based on the results of a 1977 Federal Highway Administration survey of state highway departments. The survey showed rapidly growing use of the gages for controlling the density of thin bridge-deck overlays, particularly of low-water-cement-ratio (0.32), low-slump (Iowa) concretes. Some use during construction of full-depth bridge decks and of pavements was also reported. A discussion of the problems involved in the use of nuclear gages--e.g., the effect of reinforcing steel on gage response and the selection of appropriate density standards-is also included. (Author)

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• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Batching, Mixing, Placing, and Curing of Concrete.
• Authors:
  • Mitchell, Terry M
• Conference:
  • 59th Annual Meeting of the Transportation Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1980-1-21 to 1980-1-25
• Publication Date: 1980

Media Info

• Media Type: Print
• Features: References; Tables;
• Pagination: pp 56-60
• Monograph Title: Corrosion, Cathodic Protection, Aggregate Upgrading, Concrete Density, and Pavement Markings
• Serial:
  • Transportation Research Record
  • Issue Number: 762
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Bridge decks; Concrete; Consolidations; Measuring instruments; Monitoring; Nuclear tests; Overlays (Pavements); Portland cement concrete; Reinforcing steel; Slump test; State of the art studies; Water cement ratio
• Uncontrolled Terms: Slumps
• Subject Areas: Geotechnology; Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00331048
• Record Type: Publication
• ISBN: 0309031044
• Files: TRIS, TRB
• Created Date: Jun 12 1981 12:00AM