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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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.

Aatm 7—One cell-size measurement will provide a representative average cell size for cellular plastics having symmetric cells of relatively uniform size. For cellular plastics having greater than 0. 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.

The explanations of r and R To determine resistance to water vapor transmission, see Test Methods E Last previous edition D — 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.

Be sure that the astn jig is free of trapped air bubbles. If there are no material specifications, then the default conditions in this standard shall apply. Material Extruded Polystyrene Thickness 3 in. It is intended for use in specications, product evaluation, and quality control. The mean-value of chord with respect to diameter Eq X1. A superscript epsilon e indicates an editorial change since the last revision or reapproval.

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This test method accounts for this error in that all calculations are based on the true specimen volume.

ASTM D2842 – 12

D — The true specimen volume is determined in Procedure A as the measured volume minus the volume of surface asgm opened by cutting. Development of this test method has taken into account the most serious of the possible sources of error. It is primarily intended for rigid cellular plastics.

Jobs The business of chemistry providesskilled, good-paying American jobs. Originally published as D — In this d28442 the only submerged measurement required is a nal weighing taken after the h immersion period. Materials that do not exhibit either of these characteristics shall be evaluated by Procedure B. Weigh to the nearest 0.

Material Polyisocyanurate Thickness 3 in.

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

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. This is accounted for by basing all buoyant force calculations on the volume of the wet specimen at the conclusion of the immersion period.

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For cellular plastics having greater than 0. 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.

Focus the e2842 on the wall or screen satm that sharp image shadowgraph results. Slice thickness should be as thin as practical so that shadowgraph will not be occluded by overlapping cell walls. The business of chemistry providesskilled, good-paying American jobs. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. ACC is investing in research to asttm understanding of how chemicals impact health and the environment.

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

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