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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Test Method D is to be used as the method to compare for accuracy checks and correction. Active view current version of standard. Soil testing Lab Services: 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 provided as part of the standard.

For some soils, such as those containing significant dd4643 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.

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. This is especially important if the water content will be used to calculate other relationships such as aatm 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.

Therefore, the procedure recommended in this test method is meant to serve as a guide when using the microwave oven. No other units of measurement are included in this test method.

A moist soil specimen is placed in a suitable container and its mass is determined. 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 regardless of what the value of the water content is; that is, 1 plus 0. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Link to Active This link will always route to the current Active version of the standard. This method may not be appropriate s4643 highly accurate results are required.

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

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. Some microwave ovens have settings at less than full power, which can also be used to reduce overheating. Request Quote D46643 Login.

For Individuals with needing special d643 for disabilities or limited English proficiency Please contact our Title VI specialist at 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.

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This method is used for occasions when a more expedient method is desirable for water content determinations. 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.

Degregation of individual particles may occur, along with vaporization or chemical transition. It is therefore recommended that samples used in this test method not be used for other tests subsequent to drying. While not eliminating this possibility, the incremental drying procedure described in this test method will minimize its effects.

Performance of the test method utilizing another system of units shall not be considered non-conformance. In addition, they are adtm of the significant digits c4643 generally should be retained.

This test method is best suited for minus 4 sized material. Soil testing Back to Results Print. 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.

Agencies that meet the criteria of Practice D are generally considered capable of competent and objective testing. Active view current version of standard. The behavior of a soil, when subjected to microwave energy, is dependent on its d4463 compositions, and as a result no one procedure is applicable for all types of soil. Larger size particles can be tested; however, care must be taken because of the increased chance of particle shattering.

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

Historical Version s – view previous versions of standard.

Agencies that meet the criteria of Practice D are generally considered capable of competent and objective testing. 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.

Reliable results depend on many factors; Practice D provides a means of evaluating some d463 those factors. 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.

awtm Users of this test method are cautioned that compliance with Practice D does not in itself ensure reliable testing. 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 atm are cautioned that compliance with Practice D does not in itself ensure reliable results. The use of a microwave oven is one such method. Larger size particles can be tested; however, care must be taken because of the increased chance of particle shattering.

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.

For more information, contact: Reliable testing depends on many factors; Practice D provides a means of evaluating some of those factors. This procedure is repeated until the mass becomes nearly constant.