ASTM D2472 PDF

More D However, this specification applies only to gas as purchased. Tests for water content, acidity hydrolyzable fluorides , noncondensable gas and carbon tetrafluoride content, and assay shall be performed and shall conform to the requirements specified. This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.

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More D This standard provides a useful first step in any field or laboratory investigation for geotechnical engineering purposes. Agencies that meet the criteria of Practice D are generally considered capable of competent and objective testing.

Users of this test method are cautioned that compliance with Practice D does not in itself assure reliable testing. Reliable testing depends on several factors; Practice D provides a means for evaluating some of those factors.

Scope 1. When the laboratory test results indicate that the soil is close to another soil classification group, the borderline condition can be indicated with two symbols separated by a slash. Borderline symbols are particularly useful when the liquid limit value of clayey soils is close to See Appendix X2.

The basis for the classification scheme is the Airfield Classification System developed by A. Casagrande in the early s. Government Agencies adopted a modified version of the Airfield System in It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

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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Permissions to reprint documents can be acquired through Copyright Clearance Center ASTM License Agreement Withdrawn Rationale: This practice covered the determination of the time from the initial mixing of the reactants of a thermosetting plastic composition to the time when solidification commences, under conditions approximating the conditions of use. This practice also provided a means for measuring the maximum temperature reached by a reacting thermosetting plastic composition, as well as the time from initial mixing to the time when this peak exothermic temperature is reached. It was limited to reacting mixtures exhibiting gel times greater than 5 min. Formerly under the jurisdiction of Committee D20 on Plastics, this practice was withdrawn in September in accordance with section Scope 1. This test method also provides a means for measuring the maximum temperature reached by a reacting thermosetting plastic composition, as well as the time from initial mixing to the time when this peak exothermic temperature is reached.

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