Nuclear gauge with compensation for sample of insufficient neutron moderating activity
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United States of America Patent
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Sep 29, 1992
Grant Date -
N/A
app pub date -
Feb 15, 1991
filing date -
Feb 15, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Method and apparatus for determining the asphalt content of a bituminous paving mix wherein Marshall plug samples of the bituminous paving mix are subjected to a neutron source and the neutrons that are thermalized by hydrogen nuclei present in the Marshall plug sample are detected and counted to provide an indication of the asphalt content of the sample. A neutron moderating substance, such as a polyethylene sample holder having receptacles for closely fitting the Marshall plug samples, is included with the sample pan to increase the number of thermalized neutrons resulting from the interaction of neutrons with hydrogen nuclei present in the sample.
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