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Author : S.N. Chen
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (428 download)
Download or read book Calibration on Nuclear Devices for Soil Density and Moisture Measurements written by S.N. Chen and published by . This book was released on 1969 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robin P. Gardner
Publisher :
ISBN 13 :
Total Pages : 56 pages
Book Rating : 4.:/5 (319 download)
Download or read book Density and Moisture Content Measurements by Nuclear Methods written by Robin P. Gardner and published by . This book was released on 1967 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 : United States. Forest Service. Vicksburg Infiltration Project
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.3/5 (243 download)
Download or read book Field Tests of Nuclear Instruments for the Measurement of Soil Moisture and Density written by United States. Forest Service. Vicksburg Infiltration Project and published by . This book was released on 1955 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : ASTM Committee D-18 on Soils for Engineering Purposes
Publisher : ASTM International
ISBN 13 :
Total Pages : 113 pages
Book Rating : 4./5 ( download)
Download or read book Symposium on Nuclear Methods for Measuring Soil Density and Moisture written by ASTM Committee D-18 on Soils for Engineering Purposes and published by ASTM International. This book was released on 1961 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robin P. Gardner
Publisher : Highway Research Board
ISBN 13 :
Total Pages : 100 pages
Book Rating : 4.:/5 (359 download)
Download or read book Optimization of Density and Moisture Content Measurements by Nuclear Methods written by Robin P. Gardner and published by Highway Research Board. This book was released on 1971 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 : Arkansas. State Highway Department
Publisher :
ISBN 13 :
Total Pages : 67 pages
Book Rating : 4.:/5 (448 download)
Download or read book Calibration and Evaluation of a Nuclear Density and Moisture Measuring Apparatus written by Arkansas. State Highway Department and published by . This book was released on 1963 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : W. F. Troxler
Publisher :
ISBN 13 :
Total Pages : 15 pages
Book Rating : 4.:/5 (125 download)
Download or read book Calibration of Nuclear Meters for Measuring Moisture and Density written by W. F. Troxler and published by . This book was released on 1964 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: The techniques in use today for the calibration of nuclear probes and some of the factors that influence calibration are discussed. Scientists and engineers have now proved the validity of determining the moisture content and density of engineering materials by means of radioactive gages. Even though the ability of the nuclear-type gage to measure moisture and density is generally acknowledged, there are still a number of questions that need answering. One such question involves an appropriate method of calibration and recalibration of the gage. Another question is whether the experimentally determined calibration curves remain valid with varying soil constituents. Initial work involved in the calibration of moisture and density probes required masses of soil that represented an infinite volume. Satisfactory portable standards have now been made to calibrate neutron moisture probes.
Author :
Publisher :
ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (979 download)
Download or read book Checking Calibration of Nuclear Soil Moisture and Density Measuring Equipment written by and published by . This book was released on 1965 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : L. F. Ballard
Publisher :
ISBN 13 :
Total Pages : 46 pages
Book Rating : 4.:/5 (319 download)
Download or read book Density and Moisture Content Measurements by Nuclear Methods written by L. F. Ballard and published by . This book was released on 1965 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 : PH. Morris
Publisher :
ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.:/5 (125 download)
Download or read book Generalized Calibration of a Nuclear Moisture/Density Depth Gauge written by PH. Morris and published by . This book was released on 1990 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The application of nuclear moisture/density depth gauges to soil deposits has generally relied on calibration by direct correlation with measured values of moisture content and density. In very soft variable deposits such as coal tailings, direct calibration is not possible. A generalized calibration can be developed from first principles based on the elemental composition of the soil being tested and the application of existing theories. Density and moisture content calibrations are considered separately for two different access tubes, and reasonably reliable calibrations are obtained. In applying these calibrations, an iterative procedure is required since the moisture content has a direct bearing on the elemental composition of the moist soil. The paper gives an insight into the operation and important features of a nuclear gauge.
Author : Richard B. Marston
Publisher :
ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (626 download)
Download or read book Checking the Calibration of Nuclear Soil Moisture and Density Measuring Equipment written by Richard B. Marston and published by . This book was released on 1965 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Christopher Hipkin
Publisher :
ISBN 13 :
Total Pages : 104 pages
Book Rating : 4.:/5 (29 download)
Download or read book Use of a Nuclear Gauge for Forest Soil Bulk Density Measurement written by Christopher Hipkin and published by . This book was released on 1987 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.3/5 (121 download)
Download or read book Measurement of Moisture and Density in Soils by the Nuclear Method written by and published by . This book was released on 1959 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Larry J. Lanz
Publisher :
ISBN 13 :
Total Pages : 76 pages
Book Rating : 4.:/5 (359 download)
Download or read book Nuclear Moisture Density Gauges written by Larry J. Lanz and published by . This book was released on 1970 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Steve L. Webster
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.:/5 (359 download)
Download or read book Determination of In-place Moisture and Density by Nuclear Methods written by Steve L. Webster and published by . This book was released on 1974 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 : Donald Jenks Belcher
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.E/5 ( download)
Download or read book The Measurement of Soil Moisture and Density by Neutron and Gamma-ray Scattering written by Donald Jenks Belcher and published by . This book was released on 1950 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : D. G. True
Publisher :
ISBN 13 :
Total Pages : 82 pages
Book Rating : 4.:/5 (359 download)
Download or read book Nuclear Metering of Soil Density and Moisture Content at Depth written by D. G. True and published by . This book was released on 1971 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study was conducted of the potential applicability of nuclear measuring techniques for determining soil density and moisture content at depth, and changes in these properties, for Navy civil engineering purposes. Measurements were obtained under two different types of engineering requirement to assess measurement capabilities: (1) in base material and subgrade soil beneath the pavements at five airfields, to detect long term variations; (2) in hydraulically placed foundation soils at two construction sites, both before and after densification of the soil was attempted by driving compaction piles, to detect changes due to the densification effort. The data were analyzed and statistical procedures were developed to determine the magnitudes of measurement error. Measurement errors were relatively low compared with the measured temporal variations in the soil properties at th soil densification sites, but were so large as to obscure a large portion of low-level, long-term changes occurring in the pavement subgrades. (Author).
