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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Users of this test method are cautioned that compliance with Practice D does not in itself ensure reliable results. This is especially important if the water content will be used to calculate other relationships such as moist mass to d464 mass or vice versa, wet unit weight to dry unit weight or vice versa, and total density to dry density or vice versa. 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.

Agencies that meet the criteria of Practice D are generally considered capable of competent and objective testing. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Test Method D is to be used as the method to compare for accuracy x4643 and correction.

For more information, contact: Reliable results depend on many factors; Practice D provides a means of evaluating some of those factors. Link to Active This link will always route to the current Active version of the standard.

Larger size particles can be tested; however, care must be taken because of the increased chance of particle shattering. 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 asttm. Some microwave ovens have settings at less than full power, which can also be used to reduce overheating.

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

ASTM D4643

The use of a microwave oven is one such method. 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. Link to Active This link will always route to the current Active version of the standard. Agencies that meet the criteria of Practice D are generally considered capable of competent and objective testing. 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.

This occurs since 1 plus the water astk not in atsm will have four significant digits regardless of what the value of the water content is; that is, 1 plus 0.

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. This procedure is repeated until the mass becomes nearly constant. This test method is best suited for minus 4 sized material. Active view current version of standard. Request Quote Client Login. 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.

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

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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. Degregation of individual particles may occur, along with vaporization or chemical transition. adtm

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

Soil testing Back to Results Print. Therefore, the procedure recommended in this test method is meant to serve as a guide when using the microwave oven. This method may not be appropriate when highly accurate results astj required.

For Individuals with needing special assistance for disabilities or limited English proficiency Please contact our Title VI specialist at Soil ashm Lab Services: A moist soil specimen is placed in a suitable container and its mass is determined.

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

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. 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. In addition, they are representative of the significant digits that generally should be retained.

Reliable testing depends on many factors; Practice D provides a means of evaluating some of those factors. It is beyond the scope of this standard to consider significant digits asmt in analysis methods for engineering design. 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.

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