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Related to relative density: Archimedes Principle
relative density[′rel·əd·iv ′den·səd·ē]
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
For a given void ratio of soil, the ratio between: (a) the difference between the void ratio of the soil in its loosest state and the given ratio and (b) the void ratio in the loosest state minus the void ratio in the densest state.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.