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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Larger size particles can be tested; however, care must be taken because of the increased chance of particle shattering. Asstm 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. For Individuals with needing special assistance for disabilities or limited English proficiency Please contact s4643 Title VI specialist at Test Method D is to be used as the method to compare for accuracy checks and correction.

A moist ast specimen is placed in a suitable container and its mass is determined. Link to Active This link will always route to the current Active version of the standard. 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 method may not be appropriate when highly accurate results are required.

Users of this test method are cautioned that compliance with Practice D does not in itself ensure reliable results. No other units of measurement are included in this test method. Link to Active This link will always route to the current Active version of the standard. Degregation of individual particles may occur, along with vaporization or chemical transition.

Note 1-Notwithstanding statements of precision and bias contained in this standard, d4634 precision of 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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Soil testing Back to Results Print.

ASTM D Standard

This method is used for occasions when a more expedient method is desirable for water content determinations. 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 use of Test Method D for water content determination can be time consuming and there are occasions when a more expedient method is desirable.

Reliable results depend on many factors; Practice D provides a means of evaluating some of those factors. For more information, contact: Some microwave ovens have settings at less than full power, which can also be used to reduce overheating. This occurs since 1 plus the water content not in percent will have four significant digits regardless aatm what the value of the water content is; that is, 1 plus 0.

ASTM D4643

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. Soil testing Lab Services: 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 procedure is repeated until the mass becomes nearly constant. v4643

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

Agencies that meet the criteria of Practice D are generally considered capable of competent and objective testing. It is therefore recommended that samples used ashm this test method not be used for ast, tests subsequent to drying. This is especially important if the water content will be used to calculate other relationships such as moist mass to dry mass or asym versa, wet unit weight to dry unit weight or vice versa, and total density to dry density or vice versa.

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Performance of the test method utilizing another system of units shall not be considered non-conformance. The behavior of d464 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.

In addition, they are representative of the significant digits that generally should be retained. Request Quote Client Login. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part 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.

Therefore, the procedure recommended in this test method is meant to serve as a guide when using the microwave oven. The quality of aetm 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 test method is best suited for minus 4 sized material. It is beyond the scope of this standard to consider significant digits used in analysis methods for engineering design.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not ast, as part of the standard. Link to Active This link will always route to the current Active version of the standard.