Standard Method of Test for
Permeability of Granular Soils (Constant Head)
AASHTO Designation: T 215-70 (2007)
ASTM Designation: D 2434-68 (1994r1
AASHTO T 215-70 (2007) is identical to ASTM D 2434-68 (l 994t 1 except that all references to
ASTM Standard D 422 contained in ASTM D 2434-68 (1994t 1 shall be replaced with AASHTO Standard T 88
1.1 This test method covers the determination of the coefficient of permeability by a constant-head method for the laminar flow of water through granular soils.
The procedure is to establish representative values of the coeffi• cient of permeability of granular soils that may occur in natural deposits as placed in embankments, or when used as base courses under pavements.
In order to limit consolida• tion influences during testing, this procedure is limited to disturbed granular soils containing not more than 10 % soil passing the 75-µm (No. 200) sieve.
1.2 This standard does not purport to address all of the safety problems, if any, associated with its use.
II is the responsibility of the user of this standard to establish appro• priate safety and health practices and determine the applica• bility of regulatory limitations prior to use.
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