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Title: Validation testing of non-nuclear alternatives to measuring soil density
Authors: Berney, Ernest S.
Mejias-Santiago, Mariely
Norris, Matthew D.
Keywords: Soils--Density
Soil moisture--Measurement--Instruments
Publisher: Geotechnical and Structures Laboratory (U.S.)
Series/Report no.: Technical Report;ERDC/GSL TR-16-28
Abstract: Abstract: During 2015, researchers with the U.S. Army Engineer Research and Development Center (ERDC) validated the effectiveness of the TransTech Combined Asphalt Soil Evaluator (CASE) and the Troxler eGauge as suitable replacements for nuclear density gauge (NDG) technology. Comparisons of soil dry density and moisture content were made between the gauges for six distinct soil types at varying densities and moisture contents. The CASE unit was calibrated using the Sand Cone and hot-plate moisture content prior to its correlation to the NDG; the eGauge was used in its shipped configuration without calibration. Results of both devices were compared to the NDG and core samples to capture asphalt density. Full-scale test sections were constructed for the soil evaluations ranging from crushed limestone to fat clays. Results showed that wet and dry densities obtained with the eGauge very closely matched those of the NDG, but the accuracy of the measured moisture contents was lower. The CASE unit’s calibrated accuracy to the NDG moisture content was excellent, but its wet and dry density accuracies were much lower than the eGauge. Based on the ERDC findings, the eGauge is recommended as the best replacement for the NDG for wet/dry density measurements and requires no calibration or transport/licensing restrictions.
Appears in Collections:Technical Report

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