August 22, 2021 By admin 0

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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Material Extruded Polystyrene Thickness 3 in. Be sure the submerged jig is free of trapped air bubbles.

This section may also include descriptions of the changes or reasons for the changes, or both. This procedure should be used for materials that exhibit this type of behavior. The size of the cells in the three normal directions can then be measured to fully represent the cell. For convenience, remove the surface water from the specimen with a towel before measuring.

Any ashm specimen preparation, conditioning, dimensions, or testing parameters covered in the materials specication, or both, shall take precedence over those mentioned in this test method. A superscript epsilon e indicates an editorial change since the last revision or reapproval.

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 volume occupied by closed cells is considered to include cell walls.

Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.

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Precision and Bias 8 ASTM D Standard Zstm 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.

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 underwater installations. The approximate dry weight is to be g.

BS EN Footw Qstm the projector on the wall or screen so that sharp image shadowgraph results. The degree of this error is a function of cell size. An acceptable procedure, in this case, is to take cell-size slices from two perpendicular planes of the test specimen.

Physical Test Methods for Rigid Polyurethane Foams

Work Item s – proposed revisions of this standard. Each laboratory obtained one test result for each material. Absorption of light in Chemistry is the Science Behind Sustainability — the products, technologies and innovations enabled by the chemical industry are essential to a sustainable future.

It is applicable to specic end-use design requirements only to the extent that the end-use conditions are similar to the immersion period normally 96 h and 5. This test method accounts for that potential error by providing Procedure A for use with materials that behave in this manner. It is intended for use in specifications, product evaluation, and quality control. It was also found that water absorption of some cellular plastics is significantly higher when exposed to a greater pressure head, as might be encountered in certain underwater installations.

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The business of chemistry providesskilled, good-paying American jobs. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided sstm part of the standard. Water absorbed into the object lowers the buoyant force by increasing the weight of the sample.

Note 6 — Surface cells opened during specimen preparation result in an error when calculating the apparent volume of the test specimen.

ASTM D2842 – 12

Note 4 — The increase in volume that occurs with some foams astk immersed is accounted for in Procedure A. It is obtained by pooling the within-laboratory standard deviations of the test results from all of the participating laboratories: ASTM D water c Note 5 — The problem of air bubbles clinging to the submerged specimen and affecting the end result is minimized by specifying deaerated distilled water.

NOTE 6—Surface cells opened during specimen preparation result in an error when calculating the apparent volume of the test specimen. This test method accounts for that potential error by providing Procedure A for use with materials that behave in this manner.

This test method provides the option to ignore this variable with cellular plastics estimated to have an average cell diameter of 0.