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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Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. NOTE 3—In some methods, an error is encountered due to a rapid absorption of water before an accurate initial weight can be obtained.

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. The remaining volume is that occupied by closed cells and cell walls. If there are no material specifications, then the default conditions in this standard shall apply.

Materials that asrm not exhibit either of these characteristics shall be evaluated by Procedure B. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. This test method provides the option to ignore this variable with cellular plastics that have an average cell diameter of 0.

To determine resistance to water vapor transmission, see Test Methods E It is applicable to specific end-use design requirements only to the extent that the end-use conditions are similar ashm the immersion period normally 96 h and 5.

This procedure should be used for materials that exhibit this type of behavior. This test method accounts for this error in that all calculations dd2842 based on the true specimen volume.

ASTM D – 01 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 standard qstm expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

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This test method provides the option to ignore this variable with cellular plastics estimated to have an average cell diameter of 0. The true specimen volume is determined in Procedure A as the measured volume minus the volume of surface cells opened by cutting. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.

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

Each laboratory obtained one test result for each material. D — For example, water absorption of some types of molded cellular plastics have been found to depend primarily on the volume rather than exposed surface area.

BS EN Footw The average sphere diameter is larger than the average circular segment diameter, d8, because the cells are randomly truncated with respect to depth at the plane of the specimen surface.

The degree of this error is a function of cell size. Results by this test method cannot be used to compare the resistance of cellular plastics to water vapor transmission and subsequent condensation within the cells.

Procedure A should be used for materials that either experience rapid water absorption or that show an dd2842 in volume during the exposure period, or both. The principles of This test method accounts for this error in that all calculations are based on the true specimen volume.

D — 01 Standard Test Method for Water Absorption of Rigid Cellular Plastics1 This standard xstm 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.

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If the surface-to-volume ratios for the test specimens and the corresponding products are different, it is possible that the test results are misleading. For the convenience of the user, Committee D20 has highlighted those changes that may impact the use of this test method.

ASTM D water c It is obtained by pooling the xstm standard deviations of the test adtm from all of the participating laboratories: 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. Balance must have provision for attaching wire sling below balance platform for making submerged weighings.

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ASTM D2842 – 12

It is a porosity determination, measuring the accessible cellular volume of a material. NOTE 5—The problem of air bubbles clinging to the submerged specimen and affecting the end result is minimized by specifying deaerated distilled water.

Last previous edition D — Absorption of light in The business of chemistry providesskilled, good-paying American jobs. Material Extruded Polystyrene Thickness 3 in. It is primarily intended for rigid cellular plastics. 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 mean-value of chord with respect to diameter Eq X1. Since any conveniently sized specimen can only be obtained by some cutting operation, a fraction of the closed cells will be opened by specimen preparation and will be included as open cells.

ACC is investing in research to improve understanding of how chemicals impact health and the environment. Optimum slice thickness will vary with the average cell size of the foam with larger cell foams requiring thicker slices. Combination of Eq X1. This standard 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.

A superscript epsilon e indicates an editorial change since the last revision or reapproval. ASTM D Standard Test Method for Compressive Properties of Rigid Cellular Plastics – This test method describes a procedure for determining the compressive properties of rigid cellular materials, particularly expanded plastics, based on test machine crosshead motion.

Then divide the length of the line 3.