The direct transmission method requires punching a hole into the surface of the material being tested and lowering the source rod to the desired depth of test. A target density is dependent on the properties of a material and a change in the properties i. Correction factors, nuclear moisturedensity measurements. Jul 27, 2017 how to prepare for a bone density scan. T191 density of soil in place by the sand cone method. Astm d6938 17a standard test methods for inplace density and. Precautions in performing moisture tests with the calcium carbide gas. Theres a medical test that uses a small amount of radioactive material to check the condition of your bones. Transport case for properly shipping and housing the gauge and tools. The nuclear gauge testing manual ngtm provides procedures and.
How to prepare for a bone density scan healthfully. Then an acp core is taken or a volutester density test is performed at the same location as the nuclear test. A nuclear density gauge is a tool used in civil construction and the petroleum industry, as well as for mining and archaeology purposes. Field density testing by using a nuclear density gauge. Manual of test procedures for materials january 1, 2017 manual of test procedures for materials viii standard description page aashto t 9915 illinois modified 010117 moisture density relations of soils using a 2. We can carry out the ndt on bituminous materials using our in house procedure. Pdf comparison of nuclear gauge densitymeter and sand. Test procedure for cohesive soil half sample 10 gram or gram, proportional method or lossbywashing greater than 15 percent 63 f. Oct 18, 2018 determination of bulk density, percentage compaction or air voids of compacted bituminous materials by nuclear density gauge method in house procedure.
Nuclear gauge testing manual department of transport and main. It consists of a radiation source that emits a cloud of particles and a sensor that counts the received particles that are either reflected by the test material or pass through it. Scope this test method describes the procedure for determining the inplace density and moisture of earthwork through the use of a nuclear gauge. This procedure supplements the manufacturers instruction manual by outlining procedures for density testing. May 15, 2015 for this test special equipment which measures in place density using gamma radiation is used. All test procedures shall be in accordance with aashto t310, inplace density and moisture content of soil and soilaggregate by nuclear methods shallow depth and astm d2950, standard test method for density of bituminous concrete in place by nuclear methods except as revised herein. Different types of soils may present different variations in field trials and laboratory tests. Nuclear gauge basics nuclear gauge manufacturers apnga. There are two different methods to determine percent density and percent moisture using the portable nuclear density gauge. A standardized weight is dropped onto the soil repeatedly and the results are measured. Thin layer density gauge, troxler model 4640b or 3450.
The methods are direct transmission and backscatter. The h4245 sand cone apparatus determines the inplace density of soils having a maximum particle size of up to 2 51mm using test hole volumes of approximately 0. Place one foot on the drill rod guide to keep it in position. Astm d6938 17a standard test methods for inplace density. The intensity of the radiation detected is dependent in part. The intensity of the radiation detected is dependent in part on the density of the.
Scope this method of test covers the procedure for measuring the inplace density of compacted asphalt materials by attenuation of gamma radiation. By calculating the percentage of particles that return to the sensor, the gauge can be calibrated to measure the density of the test material. The nuclear wet density and moisture, if required of each site is obtained. Humboldt gauges do not have a procedure for gauge function tests or specify limits, however to ensure. Nuclear moisturedensity field testing procedure quick reference guide. Using our calibrated troxler nuclear density testing gauge, we can provide you with accurate and reliable data. Illinois test procedures for other materials may be included. This paper outlines a comparison between nuclear gauge densitymeter and sand cone test, used in two. Earthwork level i certified ndor field personnel will perform nuclear density and moisture testing of earth materials embankment, subgrade. The testing procedure is analogous to burying a known quantity of radioactive. Procedure the procedure using the backscatter method is as follows. This method is used to determine the inplace density of various materials using the backscatter or direct transmission method.
Field density testing by using a nuclear density gauge roads and. A density and moisture correction factor must be determined at the beginning of each project, and. Kentucky method 6400208 revised 022908 supersedes 64002. T310 density of soil in place by the nuclear gauge. The troxler model 3440 roadreader nuclear moisture density gauge offers two test modes for measuring the density of soil, aggregate, concrete and asphalt materials. To diagnose osteoporosis, doctors will usually use a reliable means of measuring a patients bone density by performing a procedure known as dual energy xray absorptiometry dexa. This test is also called a cardiac or nuclear stress test. This test method is designed to measure the degree of compaction of plantmix base and surface mat and joint density using a nuclear density testing device. While it is a quick and unobtrusive procedure, there are some things you should do to prepare yourself for it. Note 4follow the instruction manual furnished with a particular gauge for specific.
Density acceptance of an area is based on nuclear density measurements meeting a minimum specified percent requirement of the target density. Its called a nuclear bone scan, and its also known as skeletal scintigraphy. During the first part of the nuclear bone scan procedure, the radioactive tracer is injected into a vein, usually in your arm. Scope this method of test covers the procedure for measuring the inplace density and moisture of soils by the attenuation of gamma and neutron radiation. The density of the material may be measured by direct transmission, backscatter, or backscatterairgap ratio methods. Nuclear density gauges measure density by measuring transmission through the soil of gamma radiation between a radioactive cesium 7 or other source and geigermueller detection circuitry. Test results this indicates that variations appended data sheets a1 through a11 present the results of all nuclear tests and core density tests run under this study. Eb 15025 page 2 of 10 scope this manual describes the operational safety procedures to be followed when using nuclear moisture density gauges under the control of the geotechnical engineering bureau, new york.
Nuclear moisturedensity field testing procedure quick. Tennessee department of transportation division of materials. Warm up the nuclear gauge in accordance with the manufacturer. Soil moisture is measured at the same time using a separate source of americium 241.
Gauge usually contains a small gamma source about 10 mci such as cesium 7 on the end of a retractable rod. For most studies, patients will be asked to drink as much fluid as possible, both before and after the nuclear bone scan procedure. A nuclear densometer is a field instrument used in geotechnical engineering to determine the density of a compacted material. References california test 226 determining moisture content by oven drying astm d70d70m standard guide for calibration facility setup for nuclear.
This test method describes the procedure for determining the inplace density and moisture of earthwork through the use of a nuclear gauge. Nuclear density testing base, select, and fdr materials this course is designed to instruct technicians and engineers in performing nuclear density acceptance testing for. Drive pin, guidescraper plate, and hammer for testing in direct transmission mode. Note 3this procedure is intended to be a general guide method. The gauge consists of a radiation source that emits radioactive particles and a sensor that counts the received particles. Sample test methods for determining percent of moisture and density of soils and asphalt nuclear method scope. Test procedure for sand and gravel lossbywashing of 15 percent or less 59 e. Earthwork level i certified ndor field personnel will perform nuclear density and moisture testing of earth materials embankment, subgrade, foundation course, granular fill, and select granular backfillin accordance with specifications and the ndor material sampling. 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. Nuclear density testing base, select, and fdr materials. Nuclear density gauge used for in situ density measurement of soil procedure.
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