ASTM D2842 PDF

ASTM D Standard Test Method for Water Absorption of Rigid Cellular Plastics. ASTM D Water Absorption – Designation: D – 01 Standard Test Method for Water Abs. ASTM D 06 Water Absorption Test Method – Download as PDF File .pdf), Text File .txt) or read online.

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Jobs The business of chemistry providesskilled, good-paying American jobs. This section may also include descriptions of the changes or reasons for the changes, or both.

Water absorbed into the object lowers the buoyant force by increasing the weight of the sample. Users e2842 this test method should apply the principles outlined in Practice E to generate specic to their materials and laboratory or between specic laboratories. Work Item s – proposed revisions of this standard. Be sure the submerged jig is free of trapped air bubbles. Link to Active This link will always route to the current Active version of the standard.

This test method accounts for that potential error by providing Procedure A for use with materials that behave in this manner. ASTM D water c The mean-value of chord with d28842 to diameter Eq X1.

This d8242 is subject to revision at any time by the responsible technical committee and must be reviewed every ve years and if not revised, either reapproved or withdrawn.

ASTM D – 12 Standard Test Method for Water Absorption of Rigid Cellular Plastics

asrm A number in parentheses indicates the year of last reapproval. For each material, all the samples were prepared at one source, but the individual specimens were prepared at the laboratories which tested them. The relationship between t and the average cell diameter d8, appearing at the plane of the cut surface may be calculated as follows: View our resource center to find press releases, testimonies, infographics and more.

Optimum slice thickness will vary with the average cell size of the foam with larger cell foams requiring thicker slices. Any test specimen preparation, conditioning, dimensions, or testing parameters covered in the materials specification, or both, shall take precedence over those mentioned in this test method.

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Note 3 — In some methods, an error is encountered due to a rapid absorption of water before an accurate initial weight can be obtained. Be sure that the submerged jig is free of trapped air bubbles.

ASTM D2842 – 12

The jig should trap no air when submerged. Originally published as D — Material Extruded Polystyrene Thickness 3 in. Do not remove any specimens from the water until all have been weighed, as removing the specimens reduces the 5.

If there are no material specications, then the default conditions apply. Chemistry is the Science Behind Sustainability — the products, technologies and innovations enabled by the chemical industry are essential to a sustainable future.

Since any conveniently sized specimen can only be obtained by some cutting operation, a fraction of the closed cells will be opened during sample preparation and will be included as open cells. D — 01 Standard Test Method for Water Absorption of Rigid Cellular Plastics1 This standard is issued under the xed designation D ; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.

Historical Version s – view previous versions of standard. Users of this standard are expressly astk that determination of the validity ashm any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

The explanations of r and R It is obtained by pooling the within-laboratory standard deviations of the test results from all of the participating laboratories: Precision and Bias 8 Note 4 — The increase in volume that occurs with some foams when immersed is accounted for in Procedure A. Reagents and Materials 7. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

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The degree of this error is a function of cell size.

ASTM D – 06 Standard Test Method for Water Absorption of Rigid Cellular Plastics

BS EN Footw This is intended for materials normally produced and sold with natural or laminated 6 Hobart Modelan electrically operated slicer available from the Hobart Manufacturing Co. It is a porosity determination, measuring the accessible cellular volume of a material. By knowing d842 volume and initial dry weight of the sample, the initial buoyant force can be calculated or the initial buoyant force can be determined by direct measurement.

A superscript epsilon e indicates an editorial change since the last revision or ashm.

NOTE 3—In some methods, an error is encountered due to a rapid absorption of water before an accurate initial weight can be obtained. Procedure A should be used for materials that either experience rapid water absorption or that show an increase in volume during the exposure period, or both.

The principles of Current edition approved November 10, This is accounted for by basing all buoyant force calculations on the volume of the wet specimen at the conclusion of the immersion period. The business of chemistry providesskilled, good-paying American jobs. This test method provides the option to ignore this variable with cellular plastics estimated to have an average cell diameter of 0. News View our resource center to find press releases, testimonies, infographics and more.

Summary of Test Method 4. A blog of the American Chemistry Council: The validity of this extrapolation will depend on the mechanism through which water is absorbed for the particular species of cellular plastic being considered. This procedure shall be used for materials that exhibit this type of behavior.

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