ASTM D4643 PDF

ND D – MICROWAVE METHOD OF DRYING SOILS. Conduct this procedure according to ND D Consult the current edition of ASTM for procedure in. ASTM D – Free download as PDF File .pdf), Text File .txt) or read online for free. ASTM D Standard Test Method for Determination of Water Content of Soil and Rock by Microwave Oven Heating. standard by ASTM.

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Users of this test method are cautioned that compliance with Practice D does not in itself ensure reliable testing. 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. For some soils, such as those containing significant amounts of halloysite, mica, montmorillonite, gypsum or other hydrated materials, highly organic soils, or soils in which the pore water contains dissolved solids such as salt in the case of marine depositsthis test method may not yield reliable water awtm values.

Users of this test method are cautioned that compliance with Practice D does not in itself ensure reliable results.

Test Method D is to be used as the method to compare for accuracy checks and correction. Link to Active This link will asm route to the current Active version of the standard. Therefore, the procedure recommended in this test method is meant to serve as a guide when using the microwave oven. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

This method may not be appropriate when highly accurate results are required. Active view current version of standard.

In addition, they are representative of the significant digits that generally should be retained. Performance of the test method utilizing another system of units shall not be considered non-conformance. Link to Active This link will always route to the current Active version of the standard. It is then placed in a microwave oven, subjected to an interval of drying, and removed from the oven and its new mass is determined.

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Degregation of individual particles may occur, along with vaporization or chemical transition. Some microwave ovens have settings at less than full power, x4643 can also be used to reduce overheating. Request Quote Client Login. A moist soil specimen is placed in a suitable container and its mass is determined. 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.

This occurs since 1 plus the water content not in percent will dd4643 four significant digits regardless of what the value of the water content is; that is, 1 plus 0.

For more information, contact: Reliable testing depends on many factors; Practice D provides a means of evaluating some of those factors. The principal objection to the use of the microwave oven for water content determination has been the possibility of overheating the soil and obtaining erroneous results.

This is especially important if the water content will be used to calculate other relationships such as moist mass to dry mass or vice versa, wet unit weight to dry unit weight or vice versa, and total density to dry density or vice versa. It is beyond the scope of this standard to consider significant digits used in analysis methods for engineering design. Larger size particles can be tested; however, care must be taken because of the increased chance of particle shattering.

ASTM D Standard

This procedure is repeated until the mass becomes d443 constant. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

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Note 1-Notwithstanding statements of precision and bias contained in this standard, the precision of this test method is dependent on the competence of the personnel performing it and the suitability of the equipment and facilities used. Reliable results depend on many factors; Practice D provides a means of evaluating some of those factors. For example, if four significant digits are required in any of the above calculations, then the water content has to be recorded to the nearest 0.

Link to Active This link will always route to the current Active version of the standard.

For some soils, such as those containing significant amounts of halloysite, mica, montmorillonite, gypsum or other hydrated materials, highly organic soils, or soils in which the pore water contains dissolved solids such as salt in the case of marine depositsthis test method may not yield reliable water content values. The use of a microwave oven is one such method. No other units of measurement are included in this test method.

Referenced V4643 purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

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This method is used for occasions when a more expedient method is desirable for water content determinations. Soil testing Back to Results Print.

It is therefore recommended that samples used in this test method not be used for other tests subsequent to drying. Larger size particles can be tested; however, care must be taken because of the increased chance of particle shattering.

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