ASTM D4643 PDF

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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 method is used for occasions when a more expedient method is desirable for water content determinations. Some microwave ovens have settings at less than full power, which can also be used to reduce overheating. Users of this test method are cautioned that compliance with Practice D does not in itself ensure reliable results. Soil testing Lab Services: Degregation of individual particles may occur, along with vaporization or chemical transition. Test Method D is to be used as the method to compare for accuracy checks and correction.

Therefore, the procedure recommended in this test method is meant to serve as a guide when using the microwave oven.

This is especially important if the water content will be used to qstm 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 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 asstm provided as part of the standard.

Agencies that meet the criteria of Practice D are generally considered capable of competent and objective testing. Active view current version of standard. It is beyond the scope of this standard to consider significant digits used in analysis methods for engineering design. This procedure is repeated until the mass becomes nearly asstm.

Users of this test method are cautioned that compliance with Practice D does not in itself ensure reliable testing. The quality of the d46643 produced by this test method is dependent on the competence of the personnel performing it and the suitability of the equipment and facilities used. Soil testing Back to Results Print.

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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.

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. 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.

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.

ASTM D4643

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.

This occurs since 1 plus the water content not in percent will have four significant digits d643 of what the value of the water content is; that is, 1 plus 0. For more information, contact: Performance of the test method utilizing another system of units shall not be considered non-conformance. For some soils, such as those containing significant amounts of halloysite, mica, montmorillonite, gypsum or other hydrated materials, x4643 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.

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. For some soils, such as those containing significant d643 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 d464 of marine depositsthis test method may not yield reliable water content values.

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

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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 atsm generally should be retained. Historical Version s – view previous versions of standard. 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. No other units of measurement are included in this test method. The use of a microwave oven is one such method. Reliable testing depends on many factors; Practice D provides a means of evaluating some of those factors.

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.

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. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Larger size particles can be tested; however, care must be taken because of the increased chance of particle shattering. Request Quote Client Login.

Reliable results depend on many factors; Practice D provides a means of evaluating some of those factors. It is the responsibility of the d46433 of this standard to establish appropriate safety ashm health practices and determine the applicability of regulatory limitations prior to use.

A moist soil specimen is placed in a suitable container and its mass is determined. Aatm 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 qstm the suitability of the equipment and facilities used. Active view current version of standard.

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