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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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. D242 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.
ASTM D – 12 Standard Test Method for Water Absorption of Rigid Cellular Plastics
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. If there are no material specications, then the default conditions apply. The nal buoyant force at the end of the immersion period is measured with an underwater weighing assembly. It is intended for use in specifications, product evaluation, and quality control.
Slice thickness should be as thin as practical so that shadowgraph will not be occluded by overlapping cell walls. Current edition approved November 10, Each laboratory obtained one test result for each material. Water absorbed into the object lowers the buoyant force by increasing the weight of the sample. Each test result was the average of three individual determinations. The mean-value of chord with respect to diameter Eq X1. 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.
Originally published as D — Note 5 — The problem of air bubbles clinging to the submerged specimen and affecting the end result is minimized by specifying deaerated distilled water.
The relationship between t and the average cell diameter d8, appearing at the plane of the cut surface may be calculated as follows: Development of this test ast, has taken into account the most serious of the possible sources of error. Adjust the water level to maintain a 5. Development of this test method has taken into account the most serious of the possible sources of error. 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.
To accommodate these larger specimens, the test equipment specied previously must be modied accordingly. A number in parentheses indicates the year of last reapproval.
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. If the surface-to-volume ratios for the test specimens and the corresponding products are different, the test results may be misleading. The principles of This test method provides the option to ignore this variable awtm cellular plastics estimated to have an average cell diameter of 0. Balance must have provision for attaching wire sling below balance platform for making submerged weighings.
ASTM D2842 – 12
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. A hole in the platform must be provided at an appropriate location to accommodate wire sling from balance to jig. An average cell diameter of 0. Note 6 — Surface cells opened during specimen preparation result in an error when calculating the apparent volume of the test specimen.
This section may also include descriptions of the changes or reasons for the changes, or both. This is accounted for by basing all buoyant force calculations on the volume of the wet specimen at the conclusion of the immersion period. It is intended for use in specications, product evaluation, and quality control.
The true specimen volume is determined in Procedure A as the measured volume minus the volume of surface cells opened by cutting.