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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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Therefore, the procedure recommended in this test method is meant to serve as a guide when using the microwave oven.

No other units of measurement are included in this test method. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

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. Some microwave ovens have settings at less than full power, which can also be used to reduce overheating.

This method is used for occasions when a more expedient method is desirable for water content determinations. This method may not be appropriate when highly accurate results are required.

Users of this test method 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.

Historical Version s – view previous versions of standard. Reliable testing depends on many factors; Practice D provides a means of evaluating some of those factors.

ASTM D Standard

Agencies that meet the criteria of Practice D are generally considered capable of competent and objective testing. It is then placed in a microwave ast, subjected to an interval of drying, and removed from the oven and its new mass is determined.

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.

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The use of a microwave oven is one such method. Degregation of individual particles may occur, along with d6443 or chemical transition.

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. For more information, contact: Performance of the test method utilizing another system of units shall not be considered non-conformance.

A moist soil specimen is placed in a suitable container and its mass is determined. The x4643 of Test Method D for water content determination can be time consuming and there are occasions when a more expedient method is desirable. For Individuals with needing special assistance for disabilities or limited English proficiency Please contact our Title VI specialist at 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.

ASTM D4643

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

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

Request Quote Client Login. Link to Active This link will always route to the current Active version of the standard. In addition, they are representative of the significant digits that generally should be retained.

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. Test Method D is to be used as the method to compare for accuracy checks and correction.

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.

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Larger size particles can be tested; however, care must be taken because of the increased chance of particle shattering. 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.

Users of this test method are cautioned that compliance with Practice D does not in itself ensure reliable testing. While not eliminating this possibility, the incremental drying procedure described in this test method will minimize its effects. Larger size particles can be tested; however, care must be taken because of the increased chance of particle shattering. 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.

The behavior of a soil, when subjected to microwave energy, is dependent on its mineralogical compositions, and as a result no one procedure is applicable for all types of soil.

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. 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. Soil testing Back to Results Print. Active view current version of standard.

For example, if four significant digits are required in any of the astmm calculations, then the water content has to be recorded to the nearest 0. It is therefore recommended that samples used in this test method not be used for other tests subsequent to drying.

Active view current version of standard. Agencies that meet the criteria of Practice D are generally considered capable of competent and objective testing. Soil testing Lab Services: