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Title: Penetration resistance of soils. Report 2, Gamma-ray techniques for nondestructive measurements of soil density and density profile
Authors: Williamson, Albert N.
Keywords: Soil penetration test
Gamma rays
Soil density
Publisher: Mobility and Environmental Systems Laboratory (U.S.)
U.S. Army Engineer Waterways Experiment Station.
Series/Report no.: Technical Report (U.S. Army Engineer Waterways Experiment Station) ; M-70-14 Rept.2
Abstract: A study was conducted to determine the feasibility of using measurements made with a multichannel gamma-ray spectrometer and a cobalt 60 radiation source for accurately determining soil density and resolving the density profile of layers. Measurements were first made on aluminum and steel plates to establish a standard reference for computing soil density. Two samples of air-dry sand were constructed at different densities to depths of approximately 120 and 125 cm in a pit 51.82 m long and 3.54 m wide. Measurements were made at depth intervals of 12.7 cm in each of six access holes located in the samples. The densities determined were compared with densities determined by nonnuclear means. Results of this study indicate that density can be measured accurately by the method described herein provided (a) the thickness through which the measurements are made. is accurately measured, and (b) the source strength and detector are suitable for the distance over which the density is measured. The combination of source and detector that was used permitted defining soil density profiles. As a result of this study, it is recommended that the method described herein be used for nondestructive soil density measurements where the density beneath the surface of a sample must be known.
Description: Technical Report
Gov't Doc #: Technical Report M-70-14 Rept.2
Rights: Approved for Public Release; Distribution is Unlimited
Size: 71 pages/4.400 Mb
Types of Materials: PDF/A
Appears in Collections:Technical Report

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