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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Test Method D is to be used as the method to compare for accuracy checks and correction. Users of this test method are cautioned that compliance with Practice D does not in itself ensure reliable testing. Larger size particles can be tested; however, care must be taken because of the increased chance of particle shattering.

Request Quote Client Login. 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. 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.

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 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. While not eliminating this possibility, the incremental drying procedure described in this test method will minimize its effects. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

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

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

For more information, contact: Active view current version of 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.

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

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

This procedure is repeated until the mass becomes nearly constant. Degregation of individual particles may occur, along with vaporization or chemical transition. Reliable results depend on many factors; Practice D provides a means of evaluating some of those factors.

ASTM D Standard

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.

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Link to Active This link will 4d643 route to the current Active version of the standard. Active view current version of standard. This occurs since 1 plus the water content not in percent will have four significant digits regardless of what the value of the water astj is; that is, 1 plus 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. 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.

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 d443, and total density to dry density or vice versa. The use of a microwave oven is one such method. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

A moist soil specimen is placed in a suitable container and its mass is determined.

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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.

Soil testing Lab Services: 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 wstm of the standard.