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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No axtm units of measurement are included in this test method. This method is used for occasions when a more expedient method is desirable for water content determinations.

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

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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. For some soils, such as those containing significant amounts of halloysite, d6443, montmorillonite, gypsum or other hydrated materials, highly organic soils, or soils in which asm pore water contains dissolved solids such as salt in the case of marine depositsthis test method may not yield reliable water content values.

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. Users of this test method are cautioned that compliance with Practice D does not in itself ensure reliable testing.

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. 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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Soil testing Back to Results Print. Link to Active This link will always route to the current Active version of the standard. Reliable results depend on many factors; Practice D provides a means of evaluating some of those factors. Request Quote Client Login.

ASTM D4643

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

Soil testing Lab Services: 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 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.

This method may not be appropriate when highly accurate results are required.

For Individuals with needing special assistance for disabilities or limited English proficiency Please contact our Title VI specialist at Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

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. 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. 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 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 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 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.

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Historical Version s – view previous versions 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.

ASTM D Standard

Larger size particles can be tested; however, care must be taken because of the increased chance of particle shattering. Agencies that meet the criteria of Practice D are generally considered capable of competent and objective testing. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

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

D643 moist soil specimen is placed in e4643 suitable container and its mass is determined. Some d46433 ovens have settings at less than full power, which can also be used to reduce overheating.

For more information, contact: It is therefore recommended that samples used in this test method not be used for other tests subsequent to drying. Test Method D is to be satm as the method to compare for accuracy checks and correction. 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.

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

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 view current version of standard. This procedure is repeated until the mass becomes nearly constant.