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Last Updated: Sep 23, 2013
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ASTM D6111-13
Standard Test Method for Bulk Density And Specific Gravity of Plastic Lumber and Shapes by Displacement
Standard Test Method for Bulk Density And Specific Gravity of Plastic Lumber and Shapes by Displacement
D6111-13
ASTM|D6111-13|en-US
Standard Test Method for Bulk Density And Specific Gravity of Plastic Lumber and Shapes by Displacement
Standard
D6111 Standard Test Method for Bulk Density And Specific Gravity of Plastic Lumber and Shapes by Displacement>
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Significance and Use
5.1 The specific gravity or density of a solid is a property that can be measured conveniently to follow physical changes in a sample, to indicate degree of uniformity among different sampling units or specimens, or to indicate the average density of a large item.
5.2 It is possible that variations in density of a particular plastic lumber or shapes specimen will be due to changes in crystallinity, loss of plasticizer/solvent content, differences in degree of foaming, or to other causes. It is possible that portions of a sample will differ in density because of difference in crystallinity, thermal history, porosity, and composition (types or proportions of resin, plasticizer, pigment, or filler).
5.4 If the cross-sectional area of the specimen is required for future testing on a particular sample, it is acceptable to determine it from a specific gravity measurement, see Eq 5.
Scope
1.1 This test method covers the determination of the bulk density and specific gravity of plastic lumber and shapes in their “as manufactured” form. As such, this is a test method for evaluating the properties of plastic lumber or shapes as a product and not a material property test method.
1.2 This test method is suitable for determining the bulk specific gravity or bulk density by immersion of the entire item or a representative cross section in water. This test method involves the weighing of a one piece specimen in water, using a sinker with plastics that are lighter than water. This test method is suitable for products that are wet by, but otherwise not affected by water for the duration of the test.
1.3 Plastic lumber and plastic shapes are currently made predominately from recycled plastics. However, this test method would also be applicable to similar manufactured plastic products made from virgin resins where the product is non-homogeneous in the cross-section.