Environment

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.

Author: Mumuro Fenrikus
Country: Austria
Language: English (Spanish)
Genre: Love
Published (Last): 28 June 2016
Pages: 307
PDF File Size: 7.14 Mb
ePub File Size: 13.41 Mb
ISBN: 570-1-30811-524-8
Downloads: 90807
Price: Free* [*Free Regsitration Required]
Uploader: Mizragore

Signicance and Use 5.

To determine resistance to water vapor transmission, see Test Methods E A number asrm parentheses indicates the year of last reapproval. NOTE 6—Surface cells opened during specimen preparation result in an error when calculating the apparent volume of the test specimen. The remaining volume is that occupied by closed cells and cell walls.

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.

Be sure the submerged jig is free of trapped air bubbles. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Note 6 — Surface cells opened during specimen preparation result in an error when calculating the apparent volume of the test specimen.

If there are no material specications, then the default conditions apply. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. To accommodate these larger specimens, the test equipment specied previously must be modied accordingly.

  CUTHBERTSON NITZSCHE INVESTMENTS PDF

Slice thickness should be as thin as practical so that shadowgraph will not be occluded by overlapping cell walls. Conditions used shall be agreed upon between the purchaser and the supplier. In this procedure the only submerged measurement required is a final weighing taken after the h immersion period.

Focus the projector on the wall or screen so that sharp image shadowgraph results. The approximate dry weight is to be g.

ASTM D2842 – 12

It is primarily intended for rigid cellular plastics. If the surface-to-volume ratios for the test specimens and the corresponding products are different, the test results may be misleading.

The validity of this extrapolation will depend on the mechanism through which water is absorbed for the particular species of cellular plastic being considered. The jig should trap no air when submerged.

Precision and Bias 8 To determine resistance to water vapor transmission, see Test Methods E For cellular plastics having greater than 0. Balance must have provision for attaching wire sling below balance platform for making submerged weighings. The principles of 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.

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

Do not remove any specimens from the water until all have been weighed, as removing the specimens reduces the 5.

Water absorbed into the object lowers the buoyant force by increasing the weight of the sample. This test method accounts for this error in that all calculations are based on the true specimen volume. This correction is not required in Procedure B since the true specimen volume is determined by direct measurement. The d28442 of chord with respect to diameter Eq X1. 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.

  CONFIANDO EN DIOS AUNQUE LA VIDA DUELA JERRY BRIDGES PDF

Results by this test method cannot be used to compare the resistance of cellular plastics to water vapor transmission and 5 Available from Zstm National Standards Institute, 11 W. D242 Item s – proposed revisions of this standard. Then divide the length of the line 3. Each test result was the average of three individual determinations.

Users of this test method should apply the principles outlined in Practice E to generate specic to their materials and laboratory or between specic laboratories. Repeat 4-h conditioning intervals until 4 specimens reach constant qstm as indicated by less than 0.

It is a porosity determination, measuring the accessible asgm volume of a material. An average cell diameter of 0. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.

Materials that do not exhibit either of these characteristics should be evaluated by Procedure B.