ASTM D5084 PDF

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GeoTesting Express is a provider of Soil Testing Services – ASTM D, Standard Test Methods for Measurement of Hydraulic Conductivity of Saturated Porous. This standard is issued under the fixed designation D ; the number 1 This standard is under the jurisdiction of ASTM Committee D18 on Soil and. Using low hydraulic gradient is time- consuming. ▫ ASTM D suggests a maximum hydraulic gradient of 30 for soils with k ≤ 1 x cm/s.

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Temperatures outside this range may be used, however, the user would have to determine the specific gravity of mercury and R T see Reliable results depend on many factors; Practice D provides a means of evaluating some of those factors.

Therefore, the results should be applied to field situations with caution and by qualified personnel. Hydraulic conductivity varies with varying void ratio, which changes when the effective stress changes. To determine the relationship between hydraulic conductivity and void ratio, the hydraulic conductivity test would have to be repeated at different effective stresses. Typically a test can be performed using Methods D, E, or F within two to three days.

These hydraulic systems are as follows:. Strategies that may be possible when dealing with such impervious materials may include the following. The key criterion is that the requirements covered in Section 5 have to be met.

The quality of the result produced by this standard is dependent of the competence of the personnel performing it and the suitability of the equipment and facilities used.

Historical Version s – view previous versions of standard. 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. Temperatures outside this range may be used; however, the user would have to determine the specific gravity of mercury and R T see Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

The procedures used do not consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the user’s objectives; and it is common practice to increase or reduce significant digits of reported data to be commensurate with these considerations.

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In addition, they are representative of the significant digits that should generally be retained. However, these test methods are only intended to be used when water is the permeant liquid. There are six alternate methods or hydraulic systems, that may be used to measure the hydraulic conductivity.

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

By tradition in U. These hydraulic systems are as follows:. It is the responsibility of the user of this standard to establish d55084 safety and health practices and determine the applicability of regulatory limitations prior to use. These test methods apply to water-saturated porous materials containing virtually no air.

The testing time is ultimately controlled by meeting the equilibrium criteria for each Method see 9. If the void ratio is changed, the hydraulic conductivity of the test specimen will likely change, see Appendix X2.

ASTM D Standard

Permeation with other liquids, such as chemical wastes, can be accomplished using procedures similar to those described in these test methods. Methods A, B, and C take a longer period-of-time, from a few days to a few weeks depending on the hydraulic conductivity.

If the confining stress is less than the swell pressure, anomalous flow conditions my occur; for example, mercury column s move in the wrong direction.

There are asttm alternate methods or hydraulic systems that may be used to measure the hydraulic conductivity. These hydraulic systems are as follows: 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.

Other strategies, such as using higher viscosity fluid or properly decreasing the cross-sectional area of the test specimen, or both, may also be possible. Properly shortening the length or enlarging the cross-sectional area, or both, of the test specimen. These hydraulic systems are as follows: Other items, such as use of higher hydraulic gradients, lower viscosity fluid, elimination of any possible chemical gradients and bacterial growth, and strict verification of leakage, may also be considered.

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Other strategies, such as using higher viscosity fluid or properly asgm the cross-sectional area of c5084 test specimen, or both, may also be possible.

ASTM D5084

The key criterion is that the requirements covered in Section 5 have to be met. Other approaches, such as use of higher hydraulic gradients, lower viscosity fluid, elimination of any possible chemical gradients and bacterial growth, and strict verification of leakage, may also be considered. Experience has sometimes shown that hydraulic conductivities measured on small test specimens are not necessarily the same as larger-scale values. It is aatm the scope of this standard to consider significant digits used in analysis methods for engineering design.

The adoption of unsteady state measurements by using high-accuracy equipment along with the rigorous analyses for determining the hydraulic parameters this approach reduces testing duration according to Zhang et al. Agencies that meet the criteria of Practice D are generally considered capable of competent and objective testing, sampling, inspection, etc.

Strategies that may be possible when dealing with such impervious materials may include the following: In addition, they are representative of the significant digits that should generally be retained. Active view current version of standard. Users of this standard are cautioned that compliance with Practice D does not in itself assure reliable results. The inch-pound units given in parentheses are mathematical conversions, which are provided for information purposes only and are not d50884 standard, unless specifically stated as standard, such as 0.

It is beyond the scope of this standard to consider significant digits used in analysis methods for engineering design. D084 procedures used do not consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the user’s asgm and it is common practice to increase or reduce significant digits of reported data to be commensurate with these considerations.