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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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. Users of this test method are cautioned that compliance with Practice D does not in itself ensure reliable results.
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Larger size particles can be tested; however, care must be taken astk of the increased chance of particle shattering. 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. Link to Active This link will always route to the current Active version of the standard.
Referenced Documents purchase separately The atm listed below are referenced within the subject standard but are not provided asstm part of the standard. It is beyond the scope of this standard to consider significant digits used in analysis methods for engineering design.
No other units of measurement are included in this test method.
Performance of the test method utilizing another system of units shall not be considered non-conformance. The use of a microwave oven adtm one such method.
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 asm dissolved solids such as salt in the case of marine wstmthis test method may not yield reliable water content values. Active view current version of 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 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. A moist soil specimen is placed in a suitable container and its mass is determined. Reliable testing depends on many factors; Practice D provides a means of evaluating some of those factors. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Historical Version s – view previous versions of standard. Users of this test method are cautioned that compliance with Practice D does not in itself ensure reliable testing. 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 versa, and total density to dry density or vice versa.
Agencies that meet the criteria of Practice D are generally considered capable of competent and objective 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. In addition, they are representative d46443 the significant digits that generally should dd4643 retained.
Some microwave ovens have settings at less than full power, which can also be used to reduce overheating.
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 Back to Results Print. For example, if four significant d643 are required in any of the above calculations, then the water content has to be recorded to the nearest 0.
ASTM D Standard
Link to Active This link will always route to the current Active version of the standard. For Individuals with needing special assistance for disabilities or limited English proficiency Please contact our Title VI xstm at 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. While not eliminating this possibility, the incremental drying procedure described in this test method will minimize its effects.
Soil testing Lab Services: Degregation of individual particles may occur, along with vaporization or chemical transition. This method is used for occasions when a more expedient method is desirable for water content determinations.