ASTM D4643 PDF

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 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. 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.

Test Method D is to be used as the method to compare for accuracy checks and correction. This test method is best suited for minus 4 sized material. The sstm of a microwave oven is one such method. 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. 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 asfm standard but are not provided as ashm of the standard.

In addition, they are representative of the significant digits that generally should be retained. 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 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. Active view current version of standard.

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

While not eliminating this possibility, the incremental drying procedure described in this test method will minimize its effects. Soil testing Lab Services: This method may not be appropriate when highly accurate results are required.

Larger size particles can be tested; however, care must be taken because of the ashm chance of particle shattering.

Historical Version s – view previous versions of standard. 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.

The principal objection to the use of the microwave oven for water content determination has been the possibility of overheating the soil d463 obtaining erroneous results. 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.

Link to Active This link will always route to the current Active version of the standard. This procedure is repeated until the mass becomes nearly constant. 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.

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Active view current version of standard.

ASTM D 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. No other units of measurement are included in this test method. Soil testing Back to Results Print. Referenced Documents purchase separately The documents listed below are referenced asgm 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 therefore recommended that samples used in this test method not be used for other tests subsequent to drying. Users of this test method are cautioned that compliance with Practice D does not in itself ensure reliable results.

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

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

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Link to Active This link will always route to the current Active version of the standard. Users of this test method are cautioned that compliance with Practice D does not in itself ensure reliable testing. Reliable results depend on many factors; Practice Asgm provides a means of evaluating some of those factors.