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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The inch-pound units given in parentheses are mathematical conversions, which are provided for information purposes only and are not considered standard, unless specifically stated as standard, such as 0. Place one porous end piece on the base and place one? Units other than second smeters metc. Therefore, it has to be accounted for as shown in Fig. The requirement that the head loss not decrease very much is intended to keep the effective stress from changing too much.
By tradition in U. In the system shown in Fig. The membrane shall be carefully inspected prior to use. If an electronic pressure transducer or other measuring device is to be used during the test to measure pore pressures or applied hydraulic gradient, bleed any trapped air from the device.
ASTM D, Test equipment Controls
If air bubbles come up from any point on the membrane, or if any visible? This value is positive if the inside diameter ID of the headwater tube is larger than the ID of the tailwater tube, and negative if the opposite is true. No further reproductions authorized. A controlled high-humidity room is usually used for this purpose. 5d084 strain caused by dismantling the cell is computed from the length of the specimen before and after dismantling the cell.
ASTM D Standard
Home Products Search results Results for: This is done for three reasons: If the specimen is placed and compacted in layers, the surface of each previouslycompacted layer shall be lightly scari? Data acquisition is included in the load frame; four channels are available for load, displacement, pore pressure and volume change.
Continue permeation until at least four values of hydraulic conductivity are obtained over an interval of time in which: Measure and record periodically the quantity of in?
However, the use of small hydraulic gradients can lead to very long testing times for materials having low hydraulic conductivity less than about 1 3 10? The back pressure may be provided by a atm 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.
The surface of the test specimen may 8 5. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
More than system configurations are available depending on type of test, sample size, pressure system.
Template for data processing and reporting: Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Hydraulic conductivity varies with varying void ratio, which changes when astk effective stress changes. Therefore, the results should be applied to field situations with caution and by qualified personnel. In addition, there is continuity of in?
TRITECH original high-performance load frames for triaxial tests, ideal solution for advanced and research laboratories that want to perform high quality tests at. Compressible materials that are fully saturated with water will have a B value of 1. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. The key criterion is that the requirements covered in Section 5 have to be met.
They shall be checked regularly to ensure that they are not clogged. Temperatures outside this range may be used; however, the user would have to determine the speci?
Standard triaxial configuration with external data acquisition can be used for performing additional test such as CBR, Unconfined and CRS, Permeability. However, for accurate B-value determination, saturation should be con? For instance, if k is very sensitive to volume changes then the effective consolidation stress needs to be accurately controlled; also, any volume changes during the back-pressuring process would have to be minimized.
Also, the back pressure and consolidation phases may be completed concurrently if back pressures are applied sufficiently slowly to minimize potential for overconsolidation of the specimen. After all visible air has been removed from the? In addition, it is either not feasible or too costly to produce multiple specimens that have uniform physical properties.
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 point.
It is beyond the scope of this standard to consider significant digits used in analysis methods for engineering design. Astj superscript epsilon e indicates an editorial change since the last revision or reapproval. Your comments are invited either for revision of this standard or d584 additional standards and should be addressed to ASTM International Asmt.
TRITECH original high-performance load frames for triaxial tests, ideal solution for advanced and research laboratories that perform high quality tests at high productivity levels. The device for pressurizing the cell may consist of a reservoir connected to the permeameter cell and partially? D — 03 X1. Determine which, if any, of the hydraulic conductivities k determined at these gradients are similar i.
However, measurement of the B coefficient as described in 9.
In that case, the specimen may be trimmed such that its longitudinal axis is perpendicular to the longitudinal axis of the sample.