ASTM D6869 PDF

Tezshura ASTM D Molecular sieve or suitable desiccant must be used in the drying tubes for the nitrogen carrier gas. Permission rights to photocopy the standard may also be secured from the ASTM website www. To request a quote for this test d others Click Here. The moisture collected in the solution within the titration cell is determined using the reaction of water with I2. The instrument is now ready for sample analysis. Be the first to comment!

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Permissions to reprint documents can be acquired through Copyright Clearance Center ASTM License Agreement Withdrawn Rationale: This practice outlines a procedure to obtain a record of normalized resistance of sands to the penetration of a standard sampler driven by a standard energy for estimating soil liquefaction potential during earthquakes.

The normalized penetration resistance determined in this practice may be useful for determination of other engineering properties of sands. Formerly under the jurisdiction of Committee D18 on Soil and Rock, this practice was withdrawn in January in accordance with section Scope 1. This practice combines results of Test Method D and interprets the data for normalization purposes.

Penetration resistance is adjusted for energy delivered in the penetration test. Energy adjustments can be estimated or measured and reported. Penetration resistance data are normalized to a standard overburden stress level.

Evaluation of liquefaction resistance may be applied to natural ground conditions or foundations for either planned or existing structures. In most cases, testing is performed in saturated deposits below the water table. In some cases, dry sands may be tested see 5. This practice is not applicable to lithified materials or fine grained soils.

Gravel can interfere with the test and result in elevated penetration resistance values. Normalization of penetration resistance values for gravelly soils is beyond the scope of this practice. This practice does not purport to address all aspects of exploration and site safety.

This standard does not purport to address all of the safety concerns, if any, associated with its use. 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.

Performance of the test usually involves use of a drill rig; therefore, safety requirements as outlined in applicable safety standards. Within the text, the SI units, are shown in parentheses. The values stated in each system are not equivalents, therefore, each system must be used independently of the other. Since these units are approximately equal within a factor of 1. The stress exponent, n, see 3. Other practices exist for estimating soil instability from penetration resistance data.

Procedures may change with advances in geotechnical engineering. It is dependent on the user in consultation with experienced engineers to select appropriate methods and correction to data. In earthquake engineering studies, many phenomena can affect soil instability. The practice reflects only one current exploration technique and method for normalizing penetration resistance data to a common level for comparisons to case history information.

This document cannot replace education or experience and should be used in conjunction with professional judgment. Not all aspects of this practice may be applicable in all circumstances.

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Jujas ASTM D 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. The water in the sample is vaporized and carried by dry oxygen free nitrogen into a reaction vessel with methanol. These reagents do not contain pyridine, are less toxic, and have no offensive odor. A volumetric burette adds iodinecontaining reagent to the titration cell until no more current is generated. The physical properties of some plastics are affected by the moisture content. High moisture content causes surface imperfections that is, splay or bubbling or degradation by hydrolysis. Record the sample weight.

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