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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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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.

Development of this test method has taken into account the most serious of the possible sources of error. News View our resource center to find press releases, testimonies, infographics and more.

Physical Test Methods for Rigid Polyurethane Foams

In this procedure the only submerged measurement required is a final weighing d282 after the h immersion period. The business of chemistry providesskilled, good-paying American jobs. Summary of Test Method 4.

If the surface-to-volume ratios for the test specimens and the corresponding s2842 are different, the test results may be misleading. An average cell diameter of 0. BS EN Footw Jobs The business of chemistry providesskilled, good-paying American jobs.

Conditions used shall be agreed upon between the purchaser and the supplier. Precision and Bias 8 The degree of this error is a function of cell size.

ASTM D2842 – 12

The volume occupied by closed cells is considered to include cell walls. A blog of the American Chemistry Council: Link to Active This link will always route to the current Active version of the standard. If there are no material specifications, then the default conditions in this standard shall apply. The explanations of r and R For the convenience of the user, Committee D20 has highlighted those changes that may impact the use of this test method. This test method provides the option to ignore this variable with cellular plastics that have an average cell diameter of 0.

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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.

Signicance and Use 5. 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.

NOTE 6—Surface cells opened during specimen preparation result in an error when calculating the apparent volume of the test specimen. Each laboratory obtained one test result for each material. Then divide the length of the line 3. This is accounted for by basing all buoyant force astmm on the volume of the wet specimen at the conclusion of the immersion period. To accommodate these larger specimens, the test equipment specied previously must be modied accordingly.

ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in asttm standard. Your comments are invited either for revision of this standard or aatm additional standards and should be addressed to ASTM International Headquarters.

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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.

The principles of Any test specimen preparation, conditioning, dimensions, or testing parameters covered in the materials specication, or both, shall take precedence over those mentioned in this test method.

This test method accounts for that potential error by providing Procedure A for use with materials that behave in this manner.

The true specimen volume is determined in Procedure A as the measured volume minus the volume of surface cells opened by cutting. Reagents and Materials 7. For cellular plastics having greater than 0. Be sure that the submerged jig is free of trapped air bubbles. Combination of Eq X1. This test method accounts for this error in that all calculations are based on the true specimen volume.

It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

The nal buoyant force at the end of the immersion period is measured with an underwater weighing assembly.