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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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 safety and health practices and determine the applicability of regulatory limitations prior to use.
Evaluation techniques specified in these test methods assume the pore space is fully saturated and are generally applicable to soils naturally sedimented in water. Active view current version of standard. Time-deformation readings are required on a 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 on the competence of the personnel performing the test and suitability of the equipment and facilities used.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The analysis is based upon the following assumptions:.
The addition of back pressure saturation does not constitute non-conformance to these test methods. Combining values from the two systems may result in non-conformance with the standard. Tests performed on other unsaturated materials such as compacted and residual weathered or chemically altered soils may require special evaluation techniques. Link to Active This link will always route to the current Active version of the standard. Equipment is available to perform consolidation tests using back pressure saturation.
The values stated in inch-pound units are approximate and given for guidance only.
Time-deformation readings are required on a minimum of two load increments. Alternative techniques to estimate the preconsolidation stress may be used when agreed to by the requesting agency and still be in conformance with these test methods.
Work Item s – proposed revisions of this standard. Alternatively, the requesting agency may specify Test Method B wherein the time-deformation readings are taken on all load increments. The compressibility of soil particles and pore water is negligible compared to the compressibility of the soil skeleton. Alternatively, the test may be performed using an apparatus equipped to saturate the specimen. Other loading schedules may be used to model particular field conditions or meet special requirements.
ASTM D Standard
The required maximum stress level depends on the purpose of the test and must be agreed on with the requesting agency. 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. Agencies that meet the criteria of Practice D generally are considered capable of competent and objective testing.
This test method provides the compression curve with explicit e2435 to account for secondary compression, the coefficient of consolidation for saturated materials, and the rate of secondary compression.
Active Risk Management
It is scientifically undesirable to combine two separate systems within a single asmt. Two alternative procedures are provided as follows: The test results can be greatly affected by sample disturbance. This implicitly combines two separate systems of asstm, that is, the absolute system and the gravimetric system. For example, it may be desirable to inundate and load the specimen in accordance with the wetting or loading pattern dd2435 in the field in order to best evaluate the response.
Traditionally, the axial stress is doubled for each increment resulting in a load increment ratio of 1. Estimates of this type are of key importance in the design of engineered structures and the evaluation of their performance. Tests performed on other soils such as compacted and residual weathered or chemically altered soils may require special evaluation techniques.
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.
Two alternative procedures are provided as follows:. 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. Historical Version s – view previous versions of standard. The apparatus in general use for these test methods do not have provisions for verification d4235 saturation. It 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. Evaluation techniques specified in this test method are generally applicable to soils naturally sedimented in water.
In the absence of specific instructions, Section 11 provides the default load increment and load duration schedule for a standard test.