RADIOISOTOPE GAUGE FOR DETERMINING CEMENT CONTENT OF CONCRETE

This invention pertains to a non-destructive testing technique for determining the amount of a constituent of interest in a mixture. The technique employs a probe which contains a single source of radiation and a detector for radiation backscattered from the test mixture. The probe is movable, in stepwise fashion, inside a tubular spacer mounted in and coaxial of a sample holder. The invention also contemplates the use of a standard having constant radiation absorption characteristics; backscattered radiation from the test mixture and standard being compared to provide information commensurate with the amount of the constituent.

• Supplemental Notes:
  • Supersedes PB-231 501. Government-owned invention available for licensing. Copy of patent available Commissioner of Patents, Washington, D.C. 20231 $0.50.
• Corporate Authors:

  Department of Transportation

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Mitchell, T M
• Publication Date: 0

Media Info

• Pagination: 6 p.

Subject/Index Terms

• TRT Terms: Alternatives analysis; Backscattering; Cement content; Chemical analysis; Chemical concentration; Concrete; Detectors; Electromagnetic radiation; Measuring instruments; Measuring probes; Nondestructive tests; Patents; Radioisotopes; Samplers
• Old TRIS Terms: Probes
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00094786
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: PAT-APPL-462618 Patent
• Files: TRIS, USDOT
• Created Date: May 14 1976 12:00AM