Calibration standards for nuclear gages - density and moisture standards. Final report

Technical Report · Mon Dec 01 04:00:00 EST 1975

OSTI ID:7116219

Castanon, D R; Chan, E; Chang, J C; Hannon, J B; Forsyth, R A

A search for suitable materials to serve as calibration standards for nuclear moisture-density gages was undertaken. A series of six blocks were fabricated for these standards. Each standard consisted of stone from a separate source. Three were quarried and cut to suitable size from stone and three were cast of portland cement and selected natural aggregate from separate sources. These were chosen as the calibration standards for all nuclear density gages used by the California Department of Transportation. Questionnaire replies from District Materials Engineers indicated that the use of standardized blocks improved accuracy, uniformity, and flexibility. Also, monetary savings are attributed to this procedure. The research involved the selection of suitable nuclear moisture gage calibration standards which resulted in a recommendation to adopt a series of silica sand water mixtures as the moisture gage calibration standards. The investigation of several soils and materials revealed a greater understanding of moisture gage response to various soil minerals. The results of these laboratory tests indicated the magnitude of gage measurement errors that could occur during moisture determinations. (GRA)

• Research Organization: California State Dept. of Transportation, Sacramento (USA). Transportation Lab.
• OSTI ID: 7116219
• Report Number(s): PB-253170
• Country of Publication: United States
• Language: English

Related Subjects

440105* -- Radiation Instrumentation-- Radiometric Instruments-- (-1987)
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CALIBRATION
CALIBRATION STANDARDS
DENSIMETERS
DENSITY
MEASURING INSTRUMENTS
MOISTURE
MOISTURE GAGES
PHYSICAL PROPERTIES
RADIOMETRIC GAGES
SOILS
STANDARDS