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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Establish allowable working pressures and make sure they are not exceeded. The development of the hydraulic conductivity equation for this type of system is given in Appendix X1.
The testing time is ultimately controlled by meeting the equilibrium criteria astk each Method see 9. Rigid tubing, such as metallic or rigid thermoplastic tubing, or glass shall be used. Test 9 Methods D and D describe two methods of compaction, but any other method speci? Data acquisition can be shared with other soil testing equipment.
ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. The total volume of the specimen is maintained constant using this procedure, thereby signi? A superscript epsilon e indicates an editorial change since the last revision or reapproval. 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 boiling is used, care shall be taken not to evaporate ast, excessive amount of water, which sstm lead to a larger salt concentration in the permeant water than desired. In addition, they are representative of the significant digits that should generally f5084 retained. If the soil core is not extruded vertically, care should be taken to avoid bending stresses on the core due to gravity.
NOTE 15—The interval of time, Dt, can be measured directly using a stop watch or equivalent device, see Properly sized tubing, etc. All the data acquisition and test management are made in manual mode Power supply is only required wstm air compressor and for triaxial load frame during failure stage.
These test methods apply to water-saturated porous materials containing virtually no air. There are six alternate methods or hydraulic systems that may be used to measure the hydraulic conductivity. This can be accomplished by individually connecting the tailwater and headwater tubing lines to clean burettes containing water at equal elevation. In areas with extremely hard or soft water, the CaCl2 solution is s5084. Measure and record these head losses at the start and end of each permeation trial as a minimum.
The back pressure may be provided by a compressed gas supply, a deadweight acting on a piston, or any other method capable of applying and controlling the back pressure to the tolerance prescribed in this paragraph. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
Minimize uncontrolled spills by using shatterproof materials zstm protective shields, or both. Data acquisition is included in the load frame; four channels are available for load, displacement, pore pressure and volume change.
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The easiest way to verify that volume changes are minor is to measure the height of the specimen during the back-pressuring process. NOTE 1—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 d55084 used.
Periodically measure the rate of in? Standard triaxial configuration with external data acquisition can be used for performing additional test such as CBR, Unconfined and CRS, Permeability. NOTE 5—For guidance or avoiding excessive consolidation in the use of vacuum for specimen saturation, consult 8. When the axtm and?
ASTM D Standard
The new subsection covered time measurements. There are now two? If the void ratio is changed, the hydraulic conductivity of the test specimen will likely change, see Appendix X2.
At no time shall a head be applied aetm that the effective con? However, these test methods are only intended to be used when water is the permeant liquid.