Improved performance criteria for use in nuclear gage specifications. Final report. [Nuclear moisture--density gages for highway compaction control]

Technical Report · Thu May 01 04:00:00 EDT 1975

OSTI ID:7330388

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

A laboratory study of nuclear moisture-density gage parameters is reported. Commercial gages were studied to determine the capabilities of present day gages. A research gage was fabricated with a system of precision modular instruments for radiation analysis and measurement and variable gage parameters. Gage geometry, configuration and components could be varied simultaneously or independently. The following gage parameters were investigated: source-detector-(separation, collimation, selection, shielding); gamma photon energy discrimination; and gage configuration. These parameters were evaluated by gage response to changes in moisture, density, soil mineral composition, surface irregularities, temperature and influence by nearby objects. The objective was to develop the criteria necessary to write efficient 'state-of-the-art' specifications for nuclear-moisture density measurement gages for use in highway compaction control. (GRA)

• Research Organization: California State Div. of Highways, Sacramento (USA). Transportation Lab.
• OSTI ID: 7330388
• Report Number(s): PB-248916; CA-DOT-TL-2108-1-75-21
• Country of Publication: United States
• Language: English

Related Subjects

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