FIELD EVALUATION OF A DIRECT TRANSMISSION TYPE NUCLEAR MOISTURE-DENSITY GAUGE
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.
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- Report was sponsored by the Missouri State Highway Department and the study was conducted in cooperation with the U.S. Department of Transportation-Federal Highway Administration.
Missouri State Highway DepartmentDivision of Materials and Research, State Highway Building
Jefferson City, MO United States 65101
- Publication Date: 1975-1
- Features: Appendices; References; Tables;
- Pagination: 23 p.
- TRT Terms: Backscattering; Construction sites; Correlation analysis; Nuclear tests; Oven drying; Regression analysis; Soil tests; T test; Testing
- Subject Areas: Data and Information Technology; Geotechnology; Highways;
- Accession Number: 00097004
- Record Type: Publication
- Report/Paper Numbers: #74-2 Final Rpt.
- Files: TRIS
- Created Date: Jul 15 1975 12:00AM