Terminology 3. Summary of Test Method 4. In this test method the thermal conductivity is determined by inserting a relatively long needle of small diameter into the material. The needle consists of both heating and temperature measuring elements.
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Want this as a site license? Changes from the previous issue A redline edition is available for this document, with all changes visible. Ask Document Center Inc. Scope 1. This test method is applicable for both intact and reconstituted soil specimens and soft rock specimens.
This test method is suitable only for homogeneous materials. No other units of measurements are included in this standard. In addition, they are representative of the significant digits that generally should be retained. It is beyond the scope of this standard to consider significant digits used in analytical methods for engineering design.
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Significance and Use 5. Agencies that meet the criteria of Practice D are generally considered capable of competent and objective testing.
Users of this standard are cautioned that compliance with Practice D does not in itself ensure reliable results. Reliable results depend on many factors; Practice D provides a means of evaluating some of those factors. Keywords heat flow; needle probe; temperature; thermal conductivity; thermal probe; thermal properties; ICS Number Code
Document Center Inc. This test method is applicable for both undisturbed and remolded soil specimens and soft rock specimens. This test method is suitable only for isotropic materials. It may be used over a limited range around ambient room temperatures for specimens containing moisture. If the results are to be reported as having been obtained by this test method, then all pertinent requirements prescribed in this test method shall be met.
Reliable Results in record time
More D Scope 1. This test method is applicable for both undisturbed and remolded soil specimens and soft rock specimens. This test method is suitable only for isotropic materials.
The modification is that the heating element is supported on a backing, thus allowing a one-directional heat flow. This allows the testing to be non-intrusive and permits the testing of solids without the need to be melted. Therefore, the temperature of the heating element versus the time function is used to calculate the thermal conductivity and thermal effusivity. On the rear face of the sample, an infrared IR detector is used to measure the temperature change. This temperature data is monitored as a function of time and used to determine thermal diffusivity. If the density and heat capacity of the sample are also known, the thermal conductivity can be calculated.
ASTM D5334 - 14
A brief report describing the test method and results is emailed to the customer within 10 working days of sample receipt at METER. Testing and delivery of results can be expedited for a fee. Soil samples should be shipped in confined containers to preserve desired bulk density. Minimum sample size is 4 cm diameter X 10 cm length.