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.
ASTM D Standard
Alternatively, the test may be performed using an apparatus equipped to saturate the specimen. 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.
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.
In particular, the rate of consolidation interpretation of the time curves is only applicable to fully saturated specimens. Traditionally, the load duration is the same for each increment and equal to 24 h. The addition of back pressure saturation does not constitute non-conformance to these test methods.
Tests performed on other unsaturated materials such as compacted and residual weathered or chemically altered soils may require special evaluation techniques. Two alternative procedures are provided as follows: 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. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.
Users of this test method are cautioned that compliance with Practice D does not assure reliable testing.
Tests performed on other soils such as compacted and residual weathered or chemically altered soils may require special evaluation techniques. Reporting of test results in units other than SI shall not be regarded as nonconformance with this test method.
This test method has been written using SI units; however, inch-pound conversions are given in the gravimetric system, where the pound wstm represents a unit of force weight. 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. 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. The test results can be greatly affected by sample disturbance.
In the absence of specific instructions, Section 11 provides the default load increment and load duration schedule for a standard test. It is necessary to use an interpretation technique which indirectly determines that consolidation is essentially complete.
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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 implicitly combines two separate systems of units, that is, the absolute xstm and the gravimetric system. Other loading schedules may be used to model particular field conditions or meet special requirements.
Estimates of this type are of key importance in the design of engineered structures and the evaluation of their performance. 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.
Link to Active This link will always route to the current Active version of the standard. Link to Active This link will always route to the current Active version of the standard.
How one applies the results obtained using this standard is beyond its scope.
The analysis is based upon the following assumptions:. Two alternative procedures are provided as follows: Evaluation techniques specified in this test method are astj applicable to soils naturally sedimented in water. Alternatively, the requesting agency may specify Test Method B wherein the time-deformation readings are taken on all load increments.
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.
The apparatus in general use for these test methods do not have provisions for verification of saturation.