Measuring and testing – Hardness – By penetrator or indentor
Patent
1993-04-20
1995-06-27
Williams, Hezron E.
Measuring and testing
Hardness
By penetrator or indentor
73 1201, 73784, 73594, 73597, 405271, G01N 3324, G01N 2918, G01V 150
Patent
active
054269725
ABSTRACT:
Methods and apparatus for determining whether soil is satisfactorily compacted. An operator delivers impact energy to the soil, and the amount of impact energy transmitted through the soil is repeatedly sensed and stored. A modelling formula, which approximates the variation of the stored amounts of impact energy, is used to generate current and target values for the level of compaction; if the current value equals or exceeds the target value, the soil is considered to be satisfactorily compacted.
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Cardenas Robert L.
Deguire Daniel R.
George David M.
Heirtzler Frank J.
Pasch Kenneth A.
Gas Research Institute
Larkin Daniel S.
Williams Hezron E.
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