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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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. Agencies that meet the criteria of Practice D are generally considered capable of competent and objective testing. Performance of the test method utilizing another system of units shall not be considered non-conformance.

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, awtm unit weight to dry unit weight or vice versa, and total density to dry density or vice versa.

Agencies that meet the criteria of Practice D are generally considered capable of competent and objective testing. For Individuals with needing special assistance for disabilities or limited English proficiency Please contact our Title VI specialist at Active view current version of standard.

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

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. Larger size asfm can be tested; however, care d46443 be taken because of the increased chance of particle shattering. Larger size particles can be tested; however, care must be taken because of the increased chance of particle shattering.

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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.

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. It is therefore recommended that samples used in this test method not be used for other tests subsequent to drying.

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

ASTM D4643

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. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of ast, limitations prior to use.

Reliable results depend on many factors; Practice D provides a means of evaluating some of those factors. A moist soil specimen is placed in r4643 suitable container and its mass is determined. Test Method D is to be used as the method to compare for accuracy checks and correction. The use of a microwave oven is one such method.

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

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.

Link to Active This link will always route to the current Active version 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. 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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No other units of measurement are included in this test method. Therefore, the procedure recommended in this test method is meant to serve as a guide when using the microwave oven. Degregation of individual particles may occur, along with vaporization or chemical transition. Request Quote Client Login. 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.

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.

ASTM D Standard

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. Soil testing Lab Services: 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.

Active xstm current version of 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. 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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Link to Active This link will always route to the current Active version 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 test method is best suited for minus 4 sized material.