GeoTesting Express is a provider of Soil Testing Services – ASTM D, Standard Test Methods for Measurement of Hydraulic Conductivity of Saturated Porous. All the Controls products ASTM D standard. Enter now!. Standard Test Method for Measurement of Hydraulic Conductivity of Saturated Porous Materials Using a Flexible Wall Permeameter.
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However, for accurate B-value determination, saturation should be con? Historical Version s – view previous versions of standard.
It is beyond the scope of this standard to consider significant digits used in analysis methods for engineering design. Alternatively, measurements of the change in height of the test specimen can be used to con?
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To prevent dissolution of air back into the water, deaired water shall not be exposed to air for prolonged periods. Large clods of material should not be broken down prior to compaction unless it is known that they will be broken in? The last digit may be due to estimation, see 5.
The testing time is ultimately controlled by meeting the equilibrium criteria for each Method see 9. Home Products Search results Results for: Therefore, where-ever practical use stainless ast, D — 03 three days. Somewhat larger hydraulic gradients are satm used in the laboratory to accelerate testing, but excessive gradients must be avoided because high seepage pressures may consolidate the material, material may be washed from the specimen, or?
If air pressure is used to control the back pressure, pressurized air will dissolve into the water, thus reducing the capacity of the water used for back pressure to dissolve air located in the pores d50884 the test specimen.
A superscript epsilon e indicates an editorial change since the last revision or reapproval. Therefore, its astn should be Dh not h; however, the tradition in geotechnical engineering is to use h instead of Dh.
D — 03 shows that?
ASTM D, Test equipment Controls
There are six alternate methods or hydraulic systems that may be used to measure the hydraulic conductivity. In that case, the specimen may be trimmed such that its longitudinal axis is perpendicular to the longitudinal axis of the sample.
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 either not feasible or too costly at this time to have ten or more laboratories participate in a round-robin testing program.
NOTE 5—For guidance or avoiding excessive consolidation in the use of vacuum for specimen saturation, consult 8. The mass and dimensions of the test specimen shall be determined to the tolerances given in 5. The pressure head is the height of a vertical column of static water that can be supported by the static pressure p at a given asgm.
The test is performed using a triaxial cell fit with 5 no-volume change valves: The diameter and height of the specimen shall each be at least 6 times greater than the largest particle size within the specimen. ASTM International takes no aastm respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. 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.
If the void ratio is changed, the d584 conductivity of the test specimen will likely change, see Appendix X2. Current edition approved Nov.
ASTM D Standard
If the number of signi? Conditions at the time of sample extrusion may dictate the direction of removal, but the principal concern is to keep the degree dd5084 disturbance minimal. By tradition in U. With this understanding, one can thereby know the accuracy to which volume changes need to be controlled while testing. Periodically measure the rate of in? Specimens obtained by tube sampling or coring may be tested without trimming except for cutting the end surfaces plane and perpendicular to the longitudinal axis of the specimen, provided soil characteristics are such that no signi?