X-ray or gamma ray systems or devices – Specific application – Diffraction – reflection – or scattering analysis
Patent
1989-02-17
1990-12-18
Fields, Carolyn E.
X-ray or gamma ray systems or devices
Specific application
Diffraction, reflection, or scattering analysis
378 86, 378308, G01B 1502
Patent
active
049791974
ABSTRACT:
The present invention provides an apparatus and method for dynamically measuring the density of soil, asphaltic material and the like during the compaction of the material. The gauge includes a nuclear radiation source and a nuclear radiation detector means which are mounted in spaced relation from the surface of the test material to form an air gap therebetween. The gauge also includes means for measuring the size of the air gap between the test material and the source and detector system, and means to compensate for the effect of the size of the air gap to thereby obtain the density of the test material.
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"New Methods for Cost Saving Pavement Evaluation", Better Roads, Jul. 1983, pp. 24-25.
Trade literature from "Seaman Nuclear Corporation", Oak Creek, Wis., Model DOR-1000 Density Measuring System, 8 pages.
Regimand Ali
Troxler, Sr. William F.
Fields Carolyn E.
Porta David P.
Troxler Electronic Laboratories, Inc.
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