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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It is beyond the scope of this standard to consider significant digits used in analysis methods for engineering design.

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The use of Test Method D for water content determination can be time consuming and there are occasions when a more expedient method is aetm. 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.

A moist soil specimen is placed in a suitable container and its mass is determined. The behavior of a soil, when subjected to microwave energy, is dependent on its mineralogical compositions, and as a result no one procedure asstm applicable for all types of soil. Request Quote Client Login.

This test method is best suited for minus 4 sized material. 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.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. 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 method may not be appropriate when highly accurate results are required.

Link to Active This link will always route to the current Active version of the standard. This procedure is repeated until the mass becomes nearly constant. Reliable testing depends on many factors; Practice D provides a means of evaluating some of those factors. Larger size particles can be tested; however, care must be taken because of the increased chance of particle shattering. While not eliminating this possibility, the incremental drying procedure described in this test method will minimize its effects.

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Degregation of individual particles may occur, along with vaporization or chemical transition. Therefore, the procedure recommended in this test method is meant to serve as a guide when using the microwave oven.

This occurs since 1 plus the water content not in percent will have four significant digits regardless of what the value of the water content is; that is, 1 plus 0. Reliable results depend on many factors; Practice D provides a means of evaluating some of those factors.

ASTM D4643

The use of a microwave oven is one such method. This ast is used for occasions when a more expedient method is desirable for water content determinations. For Individuals with needing special assistance for disabilities or limited English proficiency Please contact our Title VI specialist at Soil testing Lab Services: The quality of the results produced by this test method is dependent on the competence of the personnel performing it and the suitability of the equipment and facilities used.

It is therefore recommended that samples used in this test method not asstm used for other tests subsequent to drying. Link to Active This link will always route to the current Active version of the standard.

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

Users of this test method are cautioned that compliance with Practice D does not in itself ensure reliable testing. 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, d46443 total density to dry density or vice versa.

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Soil testing Back to Results Print. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. No other units of measurement are included in this test method. Some microwave ovens have settings at less than full power, which can also be used to reduce overheating. The principal objection to the use of the microwave oven for water content determination has been atm possibility of overheating the soil and obtaining erroneous results.

Larger size particles can be tested; however, care must be taken because of the increased chance of particle shattering. It is the responsibility of the user of this standard to establish appropriate safety d643 health practices and determine the applicability of regulatory limitations prior to use.

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. Performance of the test method utilizing another system of units shall not be considered non-conformance.

Test Method D is to be used as the method to compare for accuracy checks and correction. Active view current version of standard. Agencies that meet the criteria of Practice D are generally considered capable of competent and objective testing.

ASTM D Standard

Agencies that meet the criteria of Practice D are generally considered capable of competent and d4463 testing. In addition, they are representative of the significant digits that generally should be retained. Historical Version s – view previous versions of standard.

For more information, contact: Active view current version of standard.