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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Your basket is empty. Time-deformation readings are required on a minimum of two load increments. In particular, the rate of consolidation interpretation of aastm time curves is only applicable to fully saturated specimens.
ASTM D Standard
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.
For some soils, the rate of consolidation is such that complete consolidation dissipation of excess pore pressure will require more than 24 h.
Estimates of this type are of key importance in the design of engineered structures and the evaluation of their performance. The values stated in inch-pound units are approximate and given for guidance only.
This implicitly combines two separate systems of units, that is, the absolute system and the gravimetric system. Link to Active This link will always route to the current Active version of the standard. Two alternative procedures are provided as follows:. Equipment is available to perform consolidation tests using back pressure saturation. Several other evaluation techniques exist and may yield different estimates of the preconsolidation stress. Note 2—Time-deformation readings are required to determine the time for completion of primary consolidation and for evaluating the coefficient of consolidation.
You may experience issues viewing this site in Internet Explorer 9, 10 or Reliable testing depends on many factors, and Practice D provides a means of evaluation some of these factors.
asfm Find Similar Items This product falls into the following categories. Link to Active This link will always route to the current Active version of the standard.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part r2435 the standard. Consolidation test results are dependent on the magnitude of the load increments.
Historical Version s – view previous versions of standard. Note 1—The dd2435 of the rate and magnitude of consolidation of soil when it is subjected to controlled-strain loading is covered by Test Method D 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.
Please download Chrome or Firefox or view our browser tips. The compressibility of soil particles and pore water is negligible compared to the compressibility of wstm soil skeleton. Alternatively, the test may be performed using an apparatus equipped to saturate the specimen. This implicitly combines two separate systems of units, that is, the absolute system and the gravimetric system. Other loading schedules may be used to model particular field conditions or meet special requirements.
This test method has been written using SI units; however, inch-pound conversions ast given in the gravimetric system, where the pound lbf represents a unit of force weight.
Note 2—Time-deformation readings are required to determine ast time for completion of primary consolidation and for evaluating the coefficient of consolidation, c v. The data from the consolidation test are used to estimate the magnitude and rate of both differential and total settlement of a structure or earthfill. This test method provides the compression curve with explicit data to account for secondary compression, the coefficient of consolidation for saturated materials, and the rate of secondary compression.
It is necessary to use an interpretation technique which indirectly determines that consolidation is essentially complete. The analysis is based upon the following assumptions:. Take satm smart route to manage medical device compliance.
Note 1—The determination of the rate and magnitude of consolidation of soil when it is subjected to controlled-strain loading is covered by Test Method D2345 The required maximum stress level depends on the purpose of the test and must be agreed on with the requesting agency.
The apparatus in general use for these test methods do not have provisions for verification of saturation. Since c varies with stress level and load increment loading or unloadingthe load increments with timed readings must astk selected with specific reference to the individual project.
ASTM D2435/D2435M – 11
You may find similar items within these categories by selecting from the choices below:. Two alternative procedures are provided as follows: Combining values from the two systems may result in non-conformance with the standard. In the absence of specific instructions, Section 11 provides the default load increment and load duration schedule for a standard test.
It is scientifically undesirable to combine two separate systems within a single standard. Tests performed on other soils such as compacted and residual weathered or chemically altered soils may require special evaluation techniques. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Evaluation techniques specified in these test methods assume the pore space is fully saturated and 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. 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. It is scientifically undesirable to combine two separate systems within a single standard.
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. Work Item s – proposed revisions of this standard. Most intact samples taken from below the water table will be saturated.