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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This procedure is repeated until the mass becomes nearly constant. The use of a microwave oven is one such method.

This method is used for occasions when a more expedient method is desirable for water content determinations. 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.

Larger size particles can be tested; however, care must be taken because of the increased chance of particle shattering. A moist soil specimen is placed in a suitable container and its mass is determined. 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 ashm 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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Active view current version of standard. Users of this test method are cautioned that compliance with Practice D does not in itself ensure reliable results. Historical Version s – view previous versions of standard. It is aastm responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 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. For Individuals with needing special assistance for disabilities or limited English proficiency Please contact our Title VI specialist at Agencies that meet the criteria of Practice D are generally considered capable of competent and objective testing.

This test method is best suited for minus 4 sized material. Active view current version of standard.

Link to Active This link will always route to the current Active dd4643 of the standard. 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. Request Quote Client Login. 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.

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.

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ASTM D4643

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. While not eliminating this possibility, the incremental drying procedure described in this test method will minimize its effects. 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.

For more information, contact: Larger size particles can be tested; however, care must be taken because of the increased chance of particle shattering. 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 then placed in a microwave oven, subjected to an interval of d46443, and removed from the oven and its new mass is determined.

ASTM D Standard

Link to Active This link will always route to the current Active version of the standard. This method may not be appropriate when highly accurate results are required. Soil adtm Lab Services: Degregation of individual particles may occur, along with vaporization or chemical transition.

Reliable testing depends on many factors; Practice D provides a means of evaluating some of those factors.

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