Designation: D/DM – 11Standard Test Methods for One-Dimensional Consolidation Properties of Soils Using Incremental Lo. GeoTesting Express is a provider of Soil Testing Services – ASTM D, Standard Test Method for One-Dimensional Consolidation Properties of Soils. Standard Test Method for One-Dimension Consolidation Properties of Soil Using Incremental Loading.
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Work Item s – proposed revisions of this standard. Reporting of test results in units other than SI shall not be regarded as nonconformance with this test method. How one applies the results obtained using this standard is beyond its scope.
Note 3—Notwithstanding the statement on precision and qstm contained in this standard, the precision of this test method is dependent on the competence of the personnel performing the test and suitability of the aetm and facilities used. It is necessary to use an interpretation technique which indirectly determines that consolidation is essentially complete.
ASTM D2435/D2435M – 11
The apparatus in general use for astmm test methods do not have provisions for verification of saturation. The test results can be greatly affected by sample disturbance. Evaluation techniques specified in this test method are generally applicable to soils naturally sedimented in water. Since c varies with stress level and load increment loading or unloadingthe load increments with timed readings must be selected with specific reference to the individual project.
Your basket is empty. You may find similar items within these categories by selecting from the choices below:. The faster, easier way to work with standards. This test method provides only the compression curve of the specimen and the results combine both primary consolidation and secondary compression deformations. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. These test methods specify procedures for two techniques Method A and Method Bhowever alternative techniques may be used when agreed to by the requesting agency and still be in conformance with these test methods.
Click to learn more. Time-deformation readings are required on a minimum of two load increments. However, the time rate of deformation is very sensitive to degree of saturation and caution must be exercised regarding estimates for duration of settlements when partially saturated conditions prevail.
Combining values from the two systems may result in non-conformance with the standard. Reliable testing depends on many factors, and Practice D provides a means of evaluation some of these factors.
The interpretation method specified by d2345 test methods to estimate the preconsolidation stress provides a simple technique to verify that one set of time readings are taken after the preconsolidation stress and that the specimen is loaded to a 2d435 high stress level.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are f2435 provided as part of the standard.
Compressibility, Compression curves, Consolidation, Consolidation coefficient, Consolidation test, Consolidometer, Preconsolidation pressure, Preconsolidation stress, Primary consolidation, Rebound, Secondary compression, Settlement, Swelling: Dd2435, the load duration is the same for each increment and equal to 24 h.
Alternative techniques to estimate the preconsolidation stress may be used when agreed to by the requesting agency and still be in conformance with these test methods.
This implicitly combines two separate systems of units, that is, the absolute system and the gravimetric system. Take the smart route to manage medical device compliance. Inundation of the test specimen does not significantly change the degree of saturation of the test specimen but rather provides boundary water to eliminate negative pore pressure associated with sampling and prevents evaporation during the test.
This test method has been written using SI units; however, inch-pound conversions are given in the gravimetric system, where the pound lbf represents a unit of force weight.
Careful selection and preparation of test specimens is required to reduce the potential of disturbance effects.
Time-deformation readings are required on a minimum of two load increments. It is scientifically undesirable to combine two separate systems within a single standard.
For intact samples, this loading procedure has provided data from which estimates of the preconsolidation stress, using established interpretation techniques, compare favorably with field observations.
Alternatively, the requesting agency may specify Test Method B wherein the time-deformation readings are taken on all load increments. Traditionally, the axial stress is doubled for each increment resulting in a load increment ratio of 1.
The required maximum stress level depends on the purpose of the test and must be agreed on with the requesting agency.
Other loading schedules may be used to model particular field conditions or meet special requirements. In particular, the rate of consolidation interpretation of the time curves is only applicable to fully saturated specimens.
This test method has been written using SI units; however, inch-pound conversions are given in the gravimetric system, where the pound lbf represents a unit of force weight. Note 2—Time-deformation readings are required to determine the time for completion of primary consolidation and for evaluating the coefficient of consolidation, c v. 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 generally are considered capable of competent and objective testing. This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3. Find Similar Items This product falls into the following categories. Tests performed on other unsaturated materials such as compacted and residual weathered or chemically altered soils may require special evaluation techniques. For example, it may be desirable to inundate and load the specimen in accordance with the wetting or loading pattern expected in the field in order to best evaluate the response.
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Link to Active This link will always route to the current Active version of the standard. This implicitly combines two separate systems of units, that is, the absolute system and the gravimetric system. The apparatus in general use does not have provisions for formal verification of pore pressure dissipation. It aastm 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.
ASTM D Standard
Two alternative procedures are provided as follows:. It is scientifically undesirable to combine two separate systems within a single standard.
The compressibility of soil particles and pore water is negligible compared to the compressibility of the soil skeleton. Please download Chrome or Firefox or view our browser tips.