ASTM D is a significantly updated version of the Standard Test Method for Determination of Thermal Conductivity of. Soils and Rock by Thermal Needle . ASTM D – Standard Test Method for Determination of Thermal Conductivity of Soil and Soft Rock by Thermal Needle Probe Procedure. This standard is. Buy ASTM D TEST METHOD FOR DETERMINATION OF THERMAL CONDUCTIVITY OF SOIL AND SOFT ROCK BY THERMAL.
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For this category of samples, TP08 has been designed. Link to Active This link will always route to the current Active version of the standard. A high quality measurement with TP08 requires that not only the sample but also the base are at a stable preferably the same temperature. It is recognized also that it would be unwise, because of the standardization of this test method, to resist in any way the further development of improved or new methods or procedures by research workers.
Soil Thermal Resistivity Meter
This includes compressible materials like soil samples which cannot be tested with the already available Mini HLQ for plane surfaces. TK04 d53340-8 use both methods by simply changing the connected probe. There were no books found for the applied search filters. Remember me for one month. The probes are calibrated once by the manufacturer before delivery. Reliable testing depends on many factors; Practice D provides a means of evaluating some of those factors. The thermal conductivity of both undisturbed and remolded soil specimens as well as soft rock specimens is used to analyze v5334-08 design systems used, for example, in underground transmission lines, oil and gas pipelines, radioactive waste disposal, and solar thermal storage facilities.
The Non-Steady-State Probe NSSP measurement method also known as transient line source, thermal needle, hot needle, heat pulse- and hot wire technique has the fundamental advantages that it is fast and absolute while the sample size is not critical.
In TP08 the reference junction of the thermocouple is located in the base. Register for a trial account. Chosing an evaluation method is a compromise: It can be used where standard size probes are too large for the available sample dimensions. F Standard Specification for Driven Fasteners: In some cases samples can even be smaller consult Hukseflux.
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TK04 uses the well-established transient line source method widely known as needle probe method according to ASTM D Significance and Use The thermal conductivity of both undisturbed and remolded soil specimens as well as soft rock specimens is used to analyze and design systems used, for example, in underground transmission lines, oil and gas pipelines, radioactive waste disposal, and solar thermal storage facilities.
The most common approximation method calculates thermal conductivity fron the slope of a straight line fitted to the measuring data. Click here to download full list of books.
The primary model of the Hukseflux product range is the TP Special models have been developed for in-situ field experiments. A separate brochure is available. Enter your account email address to request a password reset: This improves reliability significantly, because thermal conductivity measurements are very sensitive to sample preparation problems and instable measuring conditions.
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. The dedicated model TP01 is specifically designed for long term monitoring. The slower the source temperature rises, the higher is the thermal conductivity of the sample material. Copyright Compu-tecture, Inc. The method then yields absolute thermal conductivity values without requiring any time-consuming reference or comparison measurements.
For permanent installation in soils, a dedicated model, TP01, is available. The measurement with TP08 is absolute. Description Specifications Specifications Downloads Product Description TP08 is a probe that offers the possibility to perform a practical and fast measurement of the thermal conductivity or thermal resistivity of the medium in which it is inserted at a high accuracy level.
Highly Accurate Evaluation Method The thermal conductivity of the sample is calculated from the temperature rise with time registered by the probe. When using the modified method, part of the heat generated during measuring penetrates into the probe body instead of the sample material.
Land Use and Development. Use the Mini VLQ for samples with a minimum diameter of 40 mm and a minimum length of 60 mm. The standard TP08 probe has proven its suitability for soils, thermal backfill materials, sediments, foodstuff, powders, sludges, paints, glues and various other materials.
A long and thin heating source the needle probe is inserted into a sample and is heated with constant power while recording the temperature rise with time inside the source. Standardization of this test method does not reduce the need for such technical knowledge. Optimal accuracy Temperature sensor in the base. FORMAT Single User Subscription Site License Subscription BOOKS All Books PACKAGES All Packages EDITION to PUBLISHER.
This model offers optimal measurement accuracy by a combination of its design features.
However, care must be taken to prevent significant error from: Downloads Download Product Manual. Referenced Documents purchase f5334-08 The documents listed below are referenced within the subject standard but are not provided as part of the standard.
This test method is applicable for both undisturbed and remolded soil specimens and soft rock specimens.
Alternative models, for instance smaller, more robust or temperature resistant have been manufactured on request. In general a NSSP consists of a heating wire, representing a perfect line source, and a temperature sensor capable of measuring the temperature at this source.
Soil Thermal Resistivity Meter – TLS – ASTM D – Thermtest Inc.
Some samples require pre-drilling. Having a needle length of 70 mm, sstm the junction at around 17 mm from the tip, and a diameter of 1.
Enter your personal account email address to request a password reset: As hard or brittle sample materials are often difficult to prepare for inserting a conventional needle probe, our modified method uses a needle embedded in the underside of a disk-shaped probe body which is just placed on top of the sample surface probe for plane surfaces.