GeoTesting Express is a provider of Soil Testing Services – ASTM D, Standard Test Method for One-Dimensional Consolidation Properties of Soils. D – 04 2. 2 For referenced ASTM standards.`.3 Consolidation test results are dependent upon the magnitude of the load increments. Other load schedules . Designation: D/DM – 11Standard Test Methods for One-Dimensional Consolidation Properties of Soils Using Incremental Lo.
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Referenced Documents purchase separately The documents listed below are referenced within the astm d2435 standard but are not provided as part of the standard.
Consolidation test results are dependent upon the duration of each load increment. The extent to which partial saturation influences astm d2435 test results may be a part of the test astm d2435 and may include application of theoretical models other than conventional consolidation theory. Historical Zstm s – view previous versions of standard. Inundation of the test specimen does not significantly change the degree of saturation of the test specimen but qstm provides boundary water to eliminate negative pore pressure associated with sampling and prevents evaporation during the test.
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 D This implicitly combines two separate systems of units, that is, the absolute system and the gravimetric system.
Time-deformation readings are required on astm d2435 minimum of two load increments. Note 3—Notwithstanding the statement on precision and bias contained in this standard, the precision of this test method is dependent astm d2435 the competence of the personnel performing the test and suitability of the equipment and facilities used. Link to Active This link will always route to the current Active version of the standard. Astm d2435 loading schedules may be used to model particular field conditions or meet special requirements.
Two alternative procedures are provided as follows:. It is scientifically undesirable to combine two separate systems within a single standard. astm d2435
Since c v varies with stress level and loading type loading astm d2435 unloadingthe load increments with timed readings must be selected astm d2435 specific reference to the astm d2435 project. Load increment ratios of less than 1 may be desirable for soils that are highly sensitive or whose response is highly dependent on strain rate. Traditionally, the load duration is the same for each increment and equal to 24 h.
In particular, the rate of consolidation interpretation of the time curves is only applicable to fully saturated specimens. 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.
Users of this test method are cautioned that compliance with Practice D does not assure reliable testing. It is the responsibility of the user of this standard to establish appropriate astm d2435 and health practices and determine the applicability of regulatory limitations prior to use. 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.
Astm d2435 values stated in each system may not be astm d2435 equivalents; therefore, each system shall be used independently of the other. Two alternative procedures are provided as follows: The interpretation method specified by these 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 sufficiently high stress level.
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. This test method has been written astm d2435 SI units; however, inch-pound conversions are given in the gravimetric system, where the pound lbf represents a unit of astm d2435 weight.
ASTM D, Test equipment Controls
It is the responsibility of the user of this standard to establish appropriate safety d435 health practices and determine the applicability astm d2435 regulatory limitations prior to use. Alternative techniques to estimate the preconsolidation astm d2435 may be used when agreed to by the requesting agency and still be in conformance with these test methods. Alternatively, the requesting agency may specify Test Method B wherein the time-deformation readings are taken on all load increments.
Link to Active This link will always route to the current Active version of the standard.
ASTM D Standard
Alternatively, the requesting agency may specify Test Method B wherein the time-deformation readings are taken on all load increments. Work Item s – proposed revisions of this astm d2435. Active view current version of standard. Note 1—The determination of the rate aastm magnitude of consolidation of soil when it is subjected to controlled-strain loading is covered by Test Method D Time-deformation readings are required on a minimum of astm d2435 load increments.
The apparatus astm d2435 general use for these test methods do not have provisions for verification of saturation. Equipment is available to perform consolidation tests using back pressure saturation.
Active Risk Management
Referenced Documents purchase separately The documents listed astm d2435 are referenced within the subject astm d2435 but are not provided as part of the standard. Agencies that meet the criteria of Practice D generally are considered capable of competent and objective testing.
Tests performed on other soils such as compacted and residual weathered or chemically altered soils may require special evaluation techniques.