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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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Reliable testing depends on many factors; Practice D provides a means of evaluating some of those factors. 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. Performance of the test method utilizing another system of units shall not be considered non-conformance. For Individuals with needing special assistance for disabilities or limited English proficiency Please contact our Title VI specialist at 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.

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

ASTM D Standard

While not eliminating this possibility, the incremental drying procedure described in this test method will minimize its effects. A moist soil specimen is placed in a suitable container and its mass is determined. The use of Test Method D for water content determination can be time consuming and there are occasions when a more expedient method is desirable. For more information, contact: 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.

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

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

This method is used for occasions when a more expedient method is desirable for water content determinations. Request Quote Client Login. Users of this test method are cautioned that compliance with Practice D does not in itself ensure reliable testing.

ASTM D4643

The quality of the results produced by this test method is dependent on the competence d46443 the personnel performing it and the suitability of the equipment and facilities used. 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.

Soil testing Back to Results Print. Historical Version s – view previous versions of standard.

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The use of a microwave oven is one such method. 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.

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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. Soil testing Lab Services: Therefore, the procedure recommended in this test method is meant to serve as d463 guide when using the microwave oven. It is therefore recommended that samples used in this test method not be used for other tests subsequent to d463. 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. Agencies that meet the criteria of Practice D are generally considered capable of competent and objective testing. 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 and health practices and determine the applicability of regulatory limitations prior to use. Degregation of individual particles may occur, along with vaporization or chemical transition.

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. Reliable results depend on many factors; Practice D provides asmt means of evaluating some of those factors.

In addition, they are representative of the significant digits that generally should be retained.