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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For each material, all the samples were prepared at one source, but the individual specimens were prepared at the laboratories which tested them. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.

This section may also include descriptions of the changes or reasons for the changes, or both. This test method provides the option to ignore this variable with cellular plastics that have an average cell diameter of 0. Signicance and Use 5.

ASTM D2842 – 12

ASTM D water c This correction is not required in Procedure B since the true specimen volume is determined by direct measurement. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

Weigh to the nearest 0. NOTE 7—One cell-size measurement will provide a representative average cell size for cellular plastics having symmetric cells of relatively uniform size. News View our resource center to find press releases, testimonies, infographics and more.

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

Development of this test method has taken into account the most serious of the possible sources of error. Users of this test method should apply the principles outlined in Asmt E to generate specic to their materials and laboratory or between specic laboratories.

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It is a porosity determination, measuring the accessible cellular volume of a material.

An average cell diameter of 0. For convenience, remove the surface water from the specimen with a towel before measuring. Procedure A shall be used d28422 materials that either experience rapid water absorption or that show an increase in volume during the exposure period, or both. The size of the cells in the three normal directions can then be measured to fully represent the cell. This is accounted for by basing all buoyant force calculations on the volume of the wet specimen at the conclusion of the immersion period.

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

Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. This test method accounts for that potential error by providing Procedure A for use with materials that behave in this manner. Results by this test method cannot be used to compare the resistance of cellular plastics to water vapor d28422 and subsequent condensation within the cells.

D — Balance must have provision for attaching wire sling below balance platform for making submerged weighings. It is intended for use in specifications, product evaluation, and quality control.

It is applicable to d842 end-use design requirements only to the extent that the end-use conditions are similar to the immersion period normally 96 h and ast.

View our resource center to find press releases, testimonies, infographics and more. In this procedure the only submerged measurement required is a final weighing asym after the h immersion period. Current edition approved November 10, R is the interval representing the critical difference between two test results for the same material, obtained by different operators using different equipment in different laboratories.

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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.

It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of d2824 limitations prior to use. Any test specimen preparation, conditioning, dimensions, or testing parameters covered in the materials specification, or x2842, shall take precedence over those mentioned in this test method. This correction is not required in Procedure B since the true specimen volume is determined by direct measurement.

The remaining volume is that occupied by closed cells and cell walls. It was also found that water absorption of some cellular plastics is signicantly higher when exposed to a greater pressure head, as might be encountered in certain atm installations. If the surface-to-volume ratios for the test specimens and the corresponding products are different, it is possible d282 the test results are misleading. Results by this test method cannot be used to compare the resistance of cellular plastics to water vapor transmission and 5 Available from American National Standards Institute, 11 W.

For the convenience of the user, Committee D20 has highlighted those changes that may impact the use of this test method. The mean-value of chord with respect to diameter Eq X1.