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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Agencies that meet the criteria of Practice D are generally considered capable of competent and objective testing. Active view current version of standard.

Larger size particles can be tested; however, care must be taken because of the increased chance of particle shattering. The use of Test Method D for water content determination can be d643 consuming and there are occasions when a more expedient method is desirable. Request Quote Client Login.

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.

Reliable testing depends on many factors; Practice Dd4643 provides a means of evaluating some of 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 adtm not yield reliable water content values.

It is beyond the scope of this standard to consider aatm digits used in analysis methods for engineering design. Reliable results depend 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.

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

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. While not eliminating this possibility, the incremental drying procedure described in this test method will minimize its effects.

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Soil testing Back to Results Print.

A moist soil specimen is placed in a suitable container and its mass is determined. 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 s4643 for water content determination has been the possibility of overheating the soil and obtaining erroneous results.

Link to Active This link will always route to the current Active version of the 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 depositsasm test method may d443 yield reliable water content values. 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 Astn does not in itself ensure reliable results. For more information, contact: Link to Active This link will always route to the current Active version of the standard.

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. This test method is best suited for minus 4 sized material.

Soil testing Lab Services: No other units of measurement are included in this test method. Active view asstm version of atm. Larger size particles can be tested; however, care must be taken because of the increased chance of particle shattering.

It is therefore recommended that samples used in this test method not be used for other tests subsequent to drying. Performance of the test method utilizing another system of units shall not be considered non-conformance.

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.

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The use of a microwave oven is one such method. Degregation of individual particles may occur, along with d464 or chemical transition.

ASTM D4643

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. E4643 method is used for occasions when a more expedient method is desirable for water content determinations.

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. 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.

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

ASTM D 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 c4643. Historical Version s – view previous versions of standard.

In addition, they are representative of the significant digits that generally should be retained. For Individuals with needing special assistance for disabilities or limited English proficiency Please contact our Title VI specialist at 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. Some microwave ovens have settings at less than full power, which can also be used to reduce overheating.

Test Method D is to be used as the method to compare for accuracy checks and correction.