IMPROVEMENT OF DEVICE (CMD) FOR MONITORING THE CONSOLIDATION OF PLASTIC CONCRETE

This report describes a program to develop an automatic distance gauging system for use in a device (CMD) for monitoring the consolidation of a portland cement concrete pavement. The capacitive distance gauging system measures the air gap between the surface of the pavement and the bottom of a gamma backscatter instrument for density monitoring. The incorporation of the capacitance gauging system has successfully made the density measurement independent of air gap height variations normally encountered as the concrete pavement surface is extruded behind a paving machine. Laboratory and field testing programs are described, and recommendations are made for further development and application of the density monitoring system. (FHWA)

  • Corporate Authors:

    Foster-Miller Associates, Incorporated

    350 Second Avenue
    Waltham, MA  United States  02254

    Federal Highway Administration

    Engineering Research and Development Bureau, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Kirby, G J
    • Lusignea, R W
  • Publication Date: 1981-8

Media Info

  • Pagination: 68 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00345376
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-RD-81-117 Final Rpt., FCP 34F3-343
  • Contract Numbers: DOT-FH-11-9630
  • Files: TRIS, USDOT
  • Created Date: Feb 27 1982 12:00AM