Field evaluation of a direct transmission type nuclear moisture-density gauge. Missouri cooperative highway research program (final)

Technical Report · Wed Jan 01 04:00:00 EST 1975

OSTI ID:7358487

Results obtained by a nuclear moisture-density gauge were correlated to those obtained by a balloon type volume device and oven drying. The nuclear testing modes were direct transmission for wet density and backscatter for moisture. Comparison tests were made on active construction projects in each of 10 soil types and graded aggregate bases from 10 stone formations. The test sites were located throughout the state. The test results were analyzed statistically by regression, correlation coefficient and t test (comparison of the means). It was found that the manufacturer's wet density calibration curve provided acceptable results in all of the Missouri soil types and stone formations tested but that the manufacturer's water calibration curve frequently furnished unacceptable values for moisture content. However, acceptable moisture content values were obtained with the nuclear gauge by use of a computed correction factor. This factor was found to be a constant for a particular soil type or stone formation on a project. (GRA)

• Research Organization: Missouri State Highway Dept., Jefferson City (USA). Div. of Materials and Research
• OSTI ID: 7358487
• Report Number(s): PB-241440
• Country of Publication: United States
• Language: English

Related Subjects

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