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.
|Genre:||Health and Food|
|Published (Last):||4 March 2009|
|PDF File Size:||6.63 Mb|
|ePub File Size:||15.75 Mb|
|Price:||Free* [*Free Regsitration Required]|
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. Active view current version of standard. Equipment is available to perform consolidation tests using back pressure saturation.
Inundation of the test specimen does not significantly change the 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 d24435.
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.
Active Risk Management
Alternatively, the test may be performed using an apparatus equipped to saturate the specimen. It is scientifically undesirable to combine two separate asstm within a single standard. 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. Time-deformation readings are required on a minimum of two load increments.
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 D Standard
Alternatively, the requesting agency may specify Test Method B wherein the time-deformation readings are taken on all load increments. In particular, the rate of consolidation interpretation of the time curves is only applicable to fully saturated specimens. Two alternative procedures are provided as follows: 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.
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.
Users zstm this test method are cautioned that compliance with D235 D does not assure reliable testing.
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.
Time-deformation readings are required on a minimum of two load increments. The test results can be greatly affected by sample disturbance. The apparatus in general use for these test methods do not have provisions for verification of saturation. The required maximum stress level depends on the purpose of the test and must be agreed on with the requesting agency. Evaluation techniques specified in this test method are generally applicable to soils naturally sedimented in water.
This implicitly combines two separate systems of units, that is, the absolute system and the gravimetric system. Careful selection and preparation of test specimens is required to reduce the potential of disturbance effects.
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 v2435. Combining values from the two systems may result in non-conformance with the standard. Several other evaluation techniques exist and may yield different estimates of the preconsolidation stress.
This implicitly combines two separate systems of units, that is, the absolute system and the gravimetric system. For some soils, the rate of consolidation is such that complete consolidation dissipation of excess pore pressure will require more than 24 h. Two alternative procedures are provided as follows:.
Note 2—Time-deformation readings are required to determine the time for completion of primary consolidation and for evaluating the coefficient of consolidation. 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. Work Item s – proposed revisions of this standard.
The addition of back pressure saturation does not constitute non-conformance to these test methods.