ASTM D2435 DOWNLOAD
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.
|Published (Last):||4 January 2016|
|PDF File Size:||11.60 Mb|
|ePub File Size:||17.89 Mb|
|Price:||Free* [*Free Regsitration Required]|
Tests performed on other unsaturated materials such as compacted and residual weathered or chemically astm d2435 soils may require special evaluation techniques. The astm d2435 from the astm d2435 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. Reporting of test results in units other than SI shall not be regarded as nonconformance with this test method. Equipment is available to perform consolidation tests using back pressure saturation. Consolidation test results are dependent upon the duration of each load increment.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Evaluation techniques astm d2435 in this test method are generally applicable to soils naturally sedimented in water.
How one applies the results obtained using this standard asym beyond its scope. Time-deformation readings are required on a minimum of two load increments.
Alternatively, the test may be performed using an apparatus equipped to saturate the specimen. Reliable testing depends on many astm d2435, and Practice D provides a means of evaluation some of these factors.
Alternatively, the requesting astm d2435 may specify Test Method B wherein the time-deformation readings are taken on all load increments. Estimates astm d2435 this type are of key importance in the design of astm d2435 structures and the evaluation of their performance. Most intact samples taken from below the water table will be saturated. It is scientifically undesirable to combine two separate systems within a single standard.
S2435 test methods use conventional consolidation theory based on Terzaghi’s consolidation equation to compute the coefficient of consolidation, c v.
Combining values from the two systems may result in non-conformance with the standard. For some soils, the rate of consolidation is such that complete consolidation dissipation of excess pore pressure will astm d2435 more than 24 h.
The apparatus in general use does not have provisions for formal verification of qstm pressure dissipation. This implicitly combines two separate systems of units, that is, the absolute system and the gravimetric system. It is scientifically undesirable to combine two separate systems within a single standard. Evaluation techniques specified in these test methods assume the pore space is fully saturated and are generally applicable to soils naturally sedimented in water.
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.
Work Item s astm d2435 proposed revisions astm d2435 this standard. Users of this test method are cautioned f2435 astm d2435 with Practice D does not assure reliable testing. Time-deformation readings are required on a satm of two load increments. The apparatus in general use for these test methods do not have provisions for verification of saturation.
Alternative techniques asym estimate the preconsolidation stress may be used when agreed to by the requesting astm d2435 and still be in conformance with these test methods.
Active Risk Management
D435 loading schedules may be used to model particular field conditions or meet special requirements. The compressibility of soil particles and pore water is negligible compared to the compressibility of the soil astm d2435. Note 2—Time-deformation readings are required to determine the time for completion of d24335 consolidation and for evaluating the coefficient of consolidation, astm d2435 v.
In particular, the rate of consolidation interpretation of the time curves is only applicable to fully saturated specimens. 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. The extent to which partial saturation influences the test results astm d2435 be a part of the test evaluation and may include application of theoretical models other than conventional consolidation theory.
Astm d2435, the requesting agency may specify Test Method B wherein the time-deformation readings are taken on all 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.
The analysis is based upon the following assumptions:. Astm d2435 c v varies with stress astm d2435 and loading type loading or unloadingthe load increments with timed readings must be selected with specific reference to the individual project.
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 astm d2435 these test methods. Work Item s – proposed revisions of this d243. Careful selection and preparation of test specimens is required to reduce the potential of disturbance effects. This astm d2435 combines two separate systems of units, astm d2435 is, the absolute system and the gravimetric system.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Two alternative procedures are provided astm d2435 follows:. 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.
ASTM D, Test equipment Controls
This test method provides only the compression curve of the astm d2435 and the results combine both primary consolidation and secondary compression deformations. Since c varies with stress level and load increment astm d2435 or unloadingthe load increments with timed readings must be selected with astk reference to the individual project.
This test method provides the compression curve with explicit data to account for secondary compression, the coefficient of consolidation for saturated materials, and astm d2435 rate d24335 secondary compression.
For intact samples, this loading procedure has provided data from which estimates astm d2435 the preconsolidation stress, using established interpretation techniques, compare favorably with field observations.
This test method has been written using SI units; however, inch-pound conversions astm d2435 given in the gravimetric system, where d435 pound lbf represents a unit of force weight. Tests performed on other soils such as compacted and residual weathered or chemically altered soils may require special evaluation techniques. Note 1—The determination astm d2435 the rate and magnitude of consolidation of soil when it is subjected to controlled-strain loading is covered by Test Method D The interpretation method specified by these test methods to estimate the preconsolidation stress provides a simple technique to verify astm d2435 one set of time readings are taken after the preconsolidation stress and that the specimen is loaded to a d4235 high stress level.
For example, it may be desirable to inundate and load the specimen in asgm with the wetting or loading pattern expected in the field in astm d2435 to best evaluate the response.