Detailed instructions are presented for the operation and maintenance of a nuclear (gamma ray backscatter and absorption) gage for measuring the cement content of plastic (fresh) portland cement concrete. The gage is a prototype based on research results reported in Federal Highway Administration Report No. FHWA-RD-73-48, "A Radioisotope Backscatter Gauge for Measuring the Cement Content of Plastic Concrete." The manual includes: procedures for establishing calibration curves, for determining cement content, and for performing basic maintenance and troubleshooting; a radiation safety discussion; and specifications, a synposis of the principles of operation, a detailed description of the components.

  • Corporate Authors:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Mitchell, T M
  • Publication Date: 1975-5

Media Info

  • Features: Appendices; Figures; Photos;
  • Pagination: 44 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00138577
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-RD-75- 63 Intrm Rpt., FCP-24F3-014
  • Files: TRIS, USDOT
  • Created Date: Sep 4 1976 12:00AM