ASTM D2435 PDF

Standard Test Method for One-Dimension Consolidation Properties of Soil Using Incremental Loading. GeoTesting Express is a provider of Soil Testing Services – ASTM D, Standard Test Method for One-Dimensional Consolidation Properties of Soils. Buy ASTM D TEST METHODS FOR ONE-DIMENSIONAL CONSOLIDATION PROPERTIES OF SOILS USING INCREMENTAL.

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It is scientifically undesirable to combine two separate systems within a single standard. Several other evaluation techniques exist and may yield different estimates of the preconsolidation stress. Two alternative procedures are provided as follows:.

Careful selection and preparation of test specimens is required to reduce the potential of disturbance effects. Equipment is available to perform consolidation tests using back pressure saturation. 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.

Inundation of the test specimen does not significantly change asym 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. Referenced Documents purchase separately The documents listed c2435 are referenced within the subject standard but are not provided as part of the standard.

ASTM D Standard

Other loading schedules may be used to model particular field conditions or meet special requirements. Reporting of test results in units other than SI shall not be regarded as nonconformance with this test method. Active view current version of standard. Traditionally, the load duration is the same for each increment and equal to asmt h. Work Item s – proposed revisions of this standard.

In particular, the rate of consolidation interpretation of the time curves is only applicable to fully saturated specimens. Time-deformation readings are required on a minimum of two load increments. Evaluation techniques specified in these test methods assume the pore space is fully saturated and are generally applicable to soils naturally sedimented in water.

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The addition of back pressure saturation does not constitute non-conformance to these test methods. 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. 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 2d435 and suitability of the equipment and facilities used.

These test methods use conventional consolidation theory based on Terzaghi’s consolidation equation to compute the coefficient of consolidation, c v. Xstm is necessary to use an interpretation technique which indirectly determines that consolidation is essentially complete. 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.

Link to Active This link will always route to the current Active version of f2435 standard. Two alternative procedures are provided as follows: The analysis is based upon the following assumptions:. Tests performed on other soils such as compacted and residual weathered or chemically altered soils may require special evaluation techniques. For some d24335, the rate of consolidation is such that complete consolidation dissipation of excess pore pressure will require more than 24 h.

Most intact samples taken from below the water table will be saturated. 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 be selected with specific reference to the individual project.

Consolidation test results are dependent on the magnitude of the load increments. It is d243 responsibility of the user of this standard to axtm appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 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 Alternatively, the test may be performed using an apparatus equipped to saturate the specimen.

It is scientifically undesirable to combine two separate systems within a single standard. Reliable testing depends on many factors, and Practice D provides a means of evaluation some of these satm.

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Alternative techniques to estimate the preconsolidation stress may be used when agreed s2435 by the requesting agency and still be in conformance with these test methods. 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.

How one applies the results obtained using this standard is beyond its scope.

ASTM D2435

Work Item s – proposed revisions of this standard. 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.

Two alternative procedures are provided as follows: Evaluation techniques specified in this test method are generally applicable to soils naturally sedimented in water. This test method has been written using SI units; however, inch-pound conversions are given in the gravimetric system, where the pound satm represents a unit of force weight.

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. Combining values from the two systems may result in non-conformance with the standard. 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 d24435 secondary compression. Two alternative procedures are provided as follows:.

Historical Version s – view previous versions of standard. The extent to which partial saturation influences the test results may be a part of the test evaluation and may include application of theoretical models other than conventional consolidation theory.

Note 2—Time-deformation readings are required to determine the time for completion of primary consolidation and for evaluating the coefficient of consolidation.