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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It is scientifically undesirable to combine two separate systems within a single standard. Asmt 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.
Link to Active This link will always route to the current Active version d24335 the standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Click to learn more. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Accept and continue Learn more about the cookies we use and how to change your settings. Note 3—Notwithstanding the statement on precision and bias 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 equipment and facilities used. How one applies the results obtained using this standard is beyond its scope.
Reporting of test results in units other than SI shall not be regarded as nonconformance with this test method.
Two alternative procedures are provided as follows: Tests performed on other unsaturated materials such as compacted and residual weathered or chemically altered soils may require special evaluation techniques. Since c varies with stress level and load increment loading or unloadingasmt load increments with timed readings must be selected with specific reference to the individual project.
ASTM D Standard
The analysis is based upon the following assumptions:. 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 scientifically undesirable e2435 combine two separate systems within a single standard. Evaluation techniques specified in this test method are generally applicable to soils naturally sedimented in water.
This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3. Work Item s – proposed revisions of this standard. The faster, easier atsm to work with standards. Link to Active This link will always route to the current Active version of the standard. Note 2—Time-deformation readings are required to determine the time for completion of primary consolidation and for evaluating the coefficient of consolidation.
Load increment ratios of less than 1 may be desirable for soils that are highly sensitive or whose response is highly dependent on strain asfm. This implicitly combines two separate systems of units, that is, the absolute system and the gravimetric system.
Note 1—The determination of the rate and magnitude of consolidation of soil when it astj subjected to controlled-strain loading is covered by Test Method D In particular, the rate of consolidation interpretation of the time curves is only applicable to fully saturated specimens.
The values stated in inch-pound units are approximate and given for guidance only. 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. Consolidation test results are dependent on the magnitude of the load increments.
Estimates of this type are of key importance in the design of engineered structures and the evaluation of their performance. Traditionally, the axial stress is doubled for each increment resulting in a load increment ratio of 1. You may experience issues viewing this site in Internet Explorer 9, 10 or This implicitly combines two separate systems of units, that is, the absolute system and the gravimetric system.
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.
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The addition of back pressure saturation does not constitute non-conformance to these test methods. Compressibility, Compression curves, Consolidation, Consolidation coefficient, Consolidation test, Consolidometer, Preconsolidation pressure, Preconsolidation stress, Primary consolidation, Rebound, Secondary compression, Settlement, Swelling: For some soils, the rate of consolidation is such that complete consolidation dissipation of excess pore pressure will require more than 24 h.
The required maximum stress level depends on the purpose of the test and must be agreed on with the requesting agency. Alternatively, asfm requesting agency may specify Test Method B wherein the time-deformation readings are taken on all load increments. Agencies that meet the criteria of Practice D generally are considered capable of competent and objective testing. Combining values from the two systems may result in non-conformance with the standard. Alternative techniques to estimate the preconsolidation stress may be used when agreed to by the requesting agency and still be in conformance with d24335 test methods.
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Historical Version s – view previous versions of standard. Careful selection and preparation of test specimens is required to reduce the potential of disturbance effects. Several other evaluation techniques exist and may yield different estimates of the preconsolidation stress.
Since c v varies with stress level and loading type loading or unloadingthe load increments with timed readings must be selected with specific reference to the individual project. Equipment is available to perform consolidation tests using back pressure saturation.