Density And Moisture Content Measurements By Nuclear Methods

Author : Robin P. Gardner,K. F. Roberts
Publisher : Unknown
Page : 56 pages
File Size : 50,9 Mb
Release : 1967
Category : Radioactive gages
ISBN : MINN:31951000497647I

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Density and Moisture Content Measurements by Nuclear Methods by Robin P. Gardner,K. F. Roberts Pdf

Sources of error that have been identified on the gamma-ray soil density gauge are: (1) sensitivity to local density variations, especially at the soil surface, (2) sensitivity to soil composition, and (3) inaccurate calibration techniques. An attempt was made to solve these problems by developing for each gauge calibration models that enable stable and homogenous non-soil standards to be used for calibration. Calibration standards and calibration models for each gauge were found and tested. In the process of developing and testing the new nuclear gauge calibration model, the dual-gauge principal of compensating these gauges for variations in soil composition was discovered. The air-gap method of using this principal is explained and was optimized by using the calibration model developed in the current study.

Author : L.F. Ballard,Robin P. Gardner
Publisher : Unknown
Page : 32 pages
File Size : 55,7 Mb
Release : 1965
Category : Electronic
ISBN : OCLC:692328976

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Density and Moisture Content Measurements by Nuclear Methods by L.F. Ballard,Robin P. Gardner Pdf

Author : L. F. Ballard,Robin P. Gardner
Publisher : Unknown
Page : 46 pages
File Size : 44,6 Mb
Release : 1965
Category : Radioisotopes
ISBN : MINN:31951000007909O

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Density and Moisture Content Measurements by Nuclear Methods by L. F. Ballard,Robin P. Gardner Pdf

Data is provided from an evaluation of the accuracy of the nuclear gages in comparison with the currently used non- nuclear methods of determining soil density and moisture content. The research study was principally theoretical in nature and was conducted in two parts with each part respectively considering density and moisture content. Two existing commercial gages were evaluated, and a nominal experimental program employing non-soil standards of known density and composition was conducted to verify the density results. The results of the moisture content study were checked against data in the literature.

Author : Robin P. Gardner
Publisher : Highway Research Board
Page : 100 pages
File Size : 42,5 Mb
Release : 1971
Category : Technology & Engineering
ISBN : ERDC:35925002175872

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Optimization of Density and Moisture Content Measurements by Nuclear Methods by Robin P. Gardner Pdf

The objective was to minimize the errors identified with measurement of density and moisture content of soils using nuclear gauges. To provide a reasonable basis for optimization, all identified errors were combined to yield a single criterion, the quality factor, which can be used to evaluate the over-all performance of a nuclear density gauge. Research aimed at minimizing moisture content measurement errors involved using the Monte Carlo or random walk method to simulate gauge response, checking the results of the simulation against experimental studies, and attempting to generalize the Monte Carlo results.

Author : ASTM Committee D-18 on Soils for Engineering Purposes
Publisher : ASTM International
Page : 113 pages
File Size : 44,7 Mb
Release : 1961
Category : Nuclear physics
ISBN : 8210379456XXX

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Symposium on Nuclear Methods for Measuring Soil Density and Moisture by ASTM Committee D-18 on Soils for Engineering Purposes Pdf

Author : Steve L. Webster
Publisher : Unknown
Page : 40 pages
File Size : 40,5 Mb
Release : 1974
Category : Radioactive gages
ISBN : ERDC:35925002775598

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Determination of In-place Moisture and Density by Nuclear Methods by Steve L. Webster Pdf

Recent advances in the design of nuclear equipment and a better understanding of the nuclear principles involved have led to increasingly widespread use of nuclear gages in earth construction control work. This report describes surface-type nuclear equipment, procedures, and various test methods used for making shallow-depth moisture and density determinations in place on soil and soil-aggregate mixtures. In general, a 6-in. direct transmission density test using a properly operating nuclear gage and an up-to-date factory calibration curve will yield test results slightly better than those of conventional density tests. The nuclear test is simpler to perform than conventional tests and requires only about 15 min to obtain both a density and moisture test result. (Modified author abstract).

Author : United States. Forest Service. Vicksburg Infiltration Project
Publisher : Unknown
Page : 36 pages
File Size : 43,7 Mb
Release : 1955
Category : Neutron counters
ISBN : OSU:32435013092614

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Field Tests of Nuclear Instruments for the Measurement of Soil Moisture and Density by United States. Forest Service. Vicksburg Infiltration Project Pdf

Author : D. J. Belcher,H. S. Sack,T. R. Cuykendall
Publisher : Unknown
Page : 20 pages
File Size : 54,8 Mb
Release : 1952
Category : Gamma rays
ISBN : CORNELL:31924003646415

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Nuclear Meters for Measuring Soil Density and Moisture in Thin Surface Layers by D. J. Belcher,H. S. Sack,T. R. Cuykendall Pdf

Author : Anonim
Publisher : Unknown
Page : 520 pages
File Size : 40,6 Mb
Release : 1965
Category : Asphalt concrete
ISBN : UCBK:C101183174

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Quality control techniques by Anonim Pdf

Author : American Society for Testing Materials. Committee E-10 on Radioisotopes and Radiation Effects. Subcommittee III on Tracer Applications
Publisher : ASTM International
Page : 119 pages
File Size : 46,6 Mb
Release : 1960
Category : Nondestructive testing
ISBN : 8210379456XXX

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Symposium on Applied Radiation and Radioisotope Test Methods by American Society for Testing Materials. Committee E-10 on Radioisotopes and Radiation Effects. Subcommittee III on Tracer Applications Pdf

Author : R. Sweeney
Publisher : Unknown
Page : 13 pages
File Size : 53,6 Mb
Release : 1962
Category : Electronic
ISBN : OCLC:24225710

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Measurement of Soil Moisture and Density by Nuclear Methods by R. Sweeney Pdf

Author : Anonim
Publisher : Unknown
Page : 658 pages
File Size : 46,7 Mb
Release : 1976
Category : Nuclear energy
ISBN : UOM:39015023546362

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Nuclear Science Abstracts by Anonim Pdf

Author : Arnold Ivan Johnson,Geological Survey (U.S.)
Publisher : Unknown
Page : 36 pages
File Size : 48,5 Mb
Release : 1962
Category : Hydrology
ISBN : UCR:31210025453513

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Methods of Measuring Soil Moisture in the Field by Arnold Ivan Johnson,Geological Survey (U.S.) Pdf

Evaluates methods for measuring soil moisture and describes the equipment used.

Author : Anonim
Publisher : Unknown
Page : 750 pages
File Size : 51,7 Mb
Release : 1965
Category : Asphalt concrete
ISBN : UOM:39015021025336

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Proceedings by Anonim Pdf

Author : Anonim
Publisher : Unknown
Page : 798 pages
File Size : 40,7 Mb
Release : 1964
Category : Highway research
ISBN : UVA:X001769221

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Highway Research News by Anonim Pdf

Issues for 1963- include section: Urban transportation research digest.