Nuclear Densometer Test
A nuclear densometer is a field instrument used in geotechnical engineering to determine the density of a compacted material. Also known as a soil density gauge, the device uses the interaction of gamma radiation with matter to measure density, either through direct transmission or the "backscatter" method. The device determines the density of material by counting the number of photons emitted by a radioactive source (cesium-137) that are read by the detector tubes in the gauge base. A 60-second time interval is typically used for the counting period.
A nuclear densometer is used on a compacted base to establish its percentage of compaction. Before field tests are performed, the technician performs a calibration on the gauge which records the 'standard count' of the machine. Standard counts are the amount of radiation released by the two nuclear sources inside the machine, with no loss or leakage. The allows the machine to compare the amount of radiation released to the amount of radiation received. With the use of a 3/4" diameter rod a hole is created in the compacted base by hammering the rod into the base to produce a hole that the densometer's probe can be inserted into. The densometer is placed on top of the hole, and then the probe is inserted into the hole by unlocking the handle at the top of the probe. One source produces radiation that interacts with the atoms in the soil, and is then compared to the standard count, to calculate the density. The other source interacts with hydrogen atoms to calculate the percentage of water in the soil.
In direct transmission mode, the source extends through the base of the gauge into a predrilled hole, positioning the source at the desired depth. The testing procedure is analogous to burying a known quantity of radioactive material at a specific depth, and then using a Geiger counter at the ground surface to measure how effectively the soil's density blocks the penetration of gamma radiation through the soil. As the soil's density increases, less radiation can pass through it, owing to dispersion from collisions with electrons in the soil being tested.
Since the soil's moisture level is partly responsible for its in-place density, the gauge also contains a neutron moisture gauge consisting of an americium/beryllium high-energy neutron source and a thermal neutron detector. The high-energy neutrons are slowed when they collide with hydrogen atoms, and the detector then counts the "slowed" neutrons. This count is proportional to the soil's water content, since the hydrogen in this water (H2O) is responsible for almost all the hydrogen found in most soils. The gauge calculates the moisture content, subtracts it from the soil's in-place (wet) density, and reports the soil's dry density.

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Nuclear densometer - Wikipedia, the free encyclopedia
A nuclear densometer is used on a compacted base to establish its percentage of compaction. Before field tests are performed, the technician performs a ...
en.wikipedia.org/wiki/Nuclear_densometer
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What is a nuclear densometer? It is an instrument used for ... - TGAA
A bias may be stored in the gauge to correct for the true moisture content by taking six correlation tests. Nuclear Density / Moisture meter: What are the benefits?
www.tgaa.asn.au/states/vic/pdf/Whatisanucleardensometer.pdf
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Earthwork/grading engineering - Application of nuclear densometer ...
Dear Members: The nuclear densometer is regarded as as a fast and accurate tool to test the density and water content of compacted soils.
www.eng-tips.com/viewthread.cfm?qid=90811
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Griffin Soil | Nuclear Gauge Vs. Sand Cone for Compaction Test
According to our conversation, the contractors are having problems getting the lime treated subgrade dense enough, as tested using nuclear densometers, and ...
www.griffinsoil.com/nuclear_gauge_vs_sand_cone_for_compaction_test
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Testing soil compaction and moisture with a nuclear densometer ...
Oct. 4, 2011 – When your customer wants to be really, really sure the soil is properly compacted. This device actually measures the gamma rays coming off ...
www.canadianrentalservice.com/content/view/2343/132/
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Nuclear Densometers from Groundtest Equipment Ltd.
Mar 8, 2008 ... Nuclear densometers, Troxler moisture - density gauges, NDMs, civil engineering equipment, Auckland, New Zealand.
www.groundtest.co.nz/densometer/troxlerpage1.php
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Nuclear Densometer Test | Flickr - Photo Sharing!
The final compaction test using the Nuclear Densometer Test method and ASTM standard D1557. The subballast needs to be compacted to 95% before BNSF ...
www.flickr.com/photos/mikebjork/3794091266/
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CWC Moisture Content Test of Glass Fill Using a Nuclear Densometer
When using a nuclear densometer, the most popular test device, these measurements are ... For a complete discussion of using the nuclear densometer to test.
www.cwc.org/gl_bp/4-01-12.pdf
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Nuclear Densometer Manual - New Mexico Department of ...
prorated on a “per test element, per module” basis. The New Mexico TTCP does not recognize and will not offer reciprocity for Nuclear Densometer (gauge).
www.dot.state.nm.us/content/dam/nmdot/TTCP/TTCP_Nuclear_Densomter_Manual.pdf
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Nuclear Stress Tests - How To Information…
A nuclear compaction test, also called a Nuclear Densometer Test, is used to determine the density and moisture of the earth on which construction projects are built.
www.ehow.com/nuclear-stress-tests/
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Nuclear Densometer Test in science
Communications Building, Soils Test - University of Wisconsin-Stout
Communications Building, Soils Test. ... denso1. One of the workers is discussing the use of the nuclear densometer for measuring soil compaction. All workers ...
[PDF]Lessons Learned Part 3 - International Mine Action Standards
Dec 3, 2009 ... with the radiation method (nuclear densometer) or estimated by the soil ..... [8] Standard Proctor Compaction Test, University of Texas, Arlington.
Geo-Con Products - Civil Engineering Equipment | Laboratory ...
Geo-Con Products is a leading supplier of high quality laboratory and testing ... Concrete - and Soil Testing Laboratories, Consulting Engineers, Universities and ... and manufacturer of Nuclear Densometers as well as supplying other testing ...
Nuclear Densometer Test pdf free ebook download from www.ets ...
Download Nuclear Densometer Test pdf documents from www.ets-testconsult. com at ... Nuclear Stress Test Instructions University of Maryland Cardiology ...
Nuclear Densometer | Products & Suppliers on GlobalSpec
Find Nuclear Densometer related suppliers, manufacturers, products and specifications on ... ...also include nuclear densitometers that are used in materials testing, such as the ... Image Credit: MR Resources | University of Colorado.
OMG UW: #9168
Jun 9, 2011 ... You transport a device called a nuclear densometer in your own vehicle (this is a commonly-used ... testing instrument which employs very small amounts of radioactive material to perform the tests). ... University of Waterloo.
Mike Dolder - Mayes Testing Engineers, Inc. - Professional Solutions ...
Mr. Dolder has more than 20 years of testing and inspection management experience. ... M.B.A. 1991 University of Phoenix, Major Emphasis on Finance and Business ... II Certified Concrete Inspector; Troxler Certified for Nuclear Densometer ...
GN Northern - About » Key Personnel
M.S. in Civil Engineering, University of Illinois, Urbana-Champaign 1989; B.S. in ... (ACI) Concrete Field Testing Technician Grade I; Nuclear Densometer Safety ...
W Kaleb Denham | LinkedIn
University of Nevada Reno; Spring Creek High School; Batu Hijau ... and Nuclear Densometer Tests on random fill, Nuclear Densometer Testing of asphalt and ...
Books on the term Nuclear Densometer Test
Forensic Seismology and Nuclear Test Bans
Forensic Seismology and Nuclear Test Bans
Alan Douglas, 2013
With the signing in 1996 of the Comprehensive Nuclear Test Ban Treaty, interest has grown in forensic seismology: the application of seismology to nuclear test ban verification. This book, based on over 50 years of experience in forensic seismology research, charts the development of methods of seismic data analysis. Topics covered include: the est...
Geotechnical Engineering: A Practical Problem Solving Approach
Geotechnical Engineering: A Practical Problem Solving Approach
Nagaratnam Sivakugan, Braja M. Das, 2009
compactive effort in the field. Dry density of the compacted earthwork and the water content are determined by a sand cone/replacement test (ASTM D1556; AS1289.5.3.1) or nuclear densometer (ASTM D2922; AS 1289.5.8.1, see Figure 4.4c).
This Is Only a Test: How Washington D.C. Prepared for Nuclear War
This Is Only a Test: How Washington D.C. Prepared for Nuclear War
David F. Krugler, 2006
This Is Only a Test tells the history of nuclear age urban planning, civil defense, and continuity of government programs in one of the nation's most critical Cold War targets: Washington, D.C. Spanning the years 1940 to 1962, This Is Only a Test uses Washington's often conflicting identities--capital, city, and symbol--to explore the con...
Design of slabs-on-ground
Design of slabs-on-ground
ACI Committee 360, American Concrete Institute, 2006
3.7—Inspection and site testing of slab support Inspection and testing are required to control the quality of the subgrade and subbase ... drive cylinder ( ASTM D 2937); sand cone (ASTM D 1556); water balloon (ASTM D 2167); or nuclear densometer (ASTM D 2922 and D 3017). ... To check the nuclear gauge against the sand cone and provide an adjustment factor, a series of calibration tests are run.
Mosby's Diagnostic and Laboratory Test Reference, 11e
Mosby's Diagnostic and Laboratory Test Reference, 11e
Kathleen Deska Pagana PhD RN and Timothy J. Pagana MD FACS, 2012
Get fast access to important diagnostic tests and procedures with Mosby's Diagnostic & Laboratory Test Reference, 11th Edition by Kathleen Deska Pagana and Timothy J. Pagana. In this bestselling handbook, concise test entries are arranged alphabetically and reflect the latest in research and diagnostic testing. Each test entry includes vit...
Effective Experiment Design and Data Analysis in Transportation ...
Effective Experiment Design and Data Analysis in Transportation ...
2012
The appropriate statistical technique for comparing the mean value of a small sample with a standard or requirement is Student's t-test. Formally, the working, or ... The variable to be used is the soil density results of Nuclear Densometer Tests.
Updated Test and Design Methods for Thermoplastic Drainage Pipe
Updated Test and Design Methods for Thermoplastic Drainage Pipe
Timothy J. McGrath, Ian D. Moore, Yick Grace Hsuan, 2009
C.4.2.3 Test Conditions The conditions for each test are summarized in Table C- 13. All tests were conducted at a temperature of 22 ± 2°C. For each of the tests, average densities were obtained using a nuclear densometer (MC-1DR-P ...
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Nuclear Densometer Test
CivicInfo BC Careers -
CivicInfo BC is web-based resource the main goal of which is to facilitate information sharing and collaboration among people who work, or have an interest in the British Columbia local government sector.
www.civicinfo.bc.ca/161.asp?jobpostingid=20046
Nuclear Free Virginia: Driver injured, nuclear device thrown from truck in crash (could be future truck full of uranium yellowcake barrels)
Comment: Hazmat team for a Nuclear densometer, can you imagine if a uranium truck wrecks on Rt 29 in Virginia which will be full of yellowcake barrels of uranium going to Kentucky? No to uranium mining and milling! Definitions of Nuclear densometer on the Web: A nuclear Densometer is a field instrument used in Geotechnical Engineering to determine the density of a compacted material. Also known as Soil Density Gauge, this device uses the interaction of gamma radiation with matter to measure density through direct transmission or backscatter method.
nuclearfreeva.blogspot.com/2010/07/driver-injured-nuclear-device-thrown.html
OMG UW: #9168
www.omguw.com/2011/06/9168.html
Must Watch: Josh Fox/Artists Against Fracking Mini-Documentary | Artists Against Fracking
artistsagainstfracking.com/mini-documentary/
Geotechnical soils and materials testing laboratory manager on a&… - All resumes (page 12)
Geotechnical soils and materials testing laboratory manager on a large scale Iron Ore project. - All resumes
www.miscojobs.com/employers/resumes/rsm_102518.htm
Failed nuclear density test so could not pour concrete. - The Garage Journal Board
Failed nuclear density test so could not pour concrete. General Garage Discussion
www.garagejournal.com/forum/showthread.php?t=10412
Broken Nuclear Densometer Shuts Down Highway
An accident caused by a broken nuclear densometer interrupted traffic on the Route H30 until the authorities don't testify there is no danger for the population.
www.ilovechile.cl/2012/12/05/broken-nuclear-densometer-closes-highway/74869
Gravel - New World Encyclopedia
www.newworldencyclopedia.org/entry/Gravel
Workers at O'Neill Building exposed to low levels of radiation | Universal Hub
www.universalhub.com/2011/workers-oneill-building-exposed-low-levels-radiati
Associated Contractors of New Mexico Highway Training & Certification Programs | The Knowledge Source | AGC - The Associated General Contractors of America
The Associated Contractors of New Mexico (ACNM) has been a partner with the New Mexico Department of Transportation (NMDOT) for the past 12 years in which both state and industry employees are trained under the same program. The Technician Training and Certification Program (TTCP) classes are conducted at the Albuquerque headquarters of ACNM, which not only boasts a state-of-the-art classroom but also offers in-house testing labs for soils, aggregates, concrete, nuclear densometer and hot mix asphalt (HMA).
newsletters.agc.org/tks/2008/09/08/associated-contractors-of-new-mexico-highway-training-certification-programs/
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