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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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. Historical Version s – view previous versions of standard. 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.

Users of this test method are cautioned that compliance with Practice D does not in itself ensure reliable testing. D46643 results depend on many factors; Practice D provides a means of evaluating some of those factors. Soil testing Lab Services: In addition, d46443 are representative of the significant digits that generally should be retained. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

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

Degregation of individual particles may occur, along with vaporization or chemical transition. A moist soil specimen is placed in a suitable container and its mass is determined. This dd4643 is used for occasions when a more expedient method is desirable for water content determinations.

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. This procedure is repeated until the mass becomes nearly constant. 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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Active view asttm version d44643 standard. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Test Method D is to be used as the method to compare for accuracy checks asmt correction.

The use of a microwave oven is one such method. Request Quote Client Login. It is the responsibility of the user of this standard aetm establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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

Some microwave ovens have settings at less than full power, which can also be used to reduce overheating. Performance of the d643 method utilizing another system of units shall not be considered non-conformance.

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 xstm drying procedure described in this test method will minimize its effects. This test method is best suited for minus 4 sized material. This method may not be appropriate when highly accurate results are required.

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. For more information, contact: Agencies that meet the criteria of Practice D are generally considered capable of competent and objective testing. 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. It is therefore recommended that samples used in this test method not be used for other tests subsequent to drying.

ASTM D Standard

No other units of measurement are included in this test method. Note d464 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.

For Individuals with needing special assistance for disabilities or limited English proficiency Please contact our Title VI specialist at Soil testing Back to Results Print. 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.

d44643

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Therefore, the astj recommended in this test method is meant to serve as a guide when using the microwave oven. 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. Link to Active This link will always route to the current Active version of the standard.