1.1 This test method covers laboratory measurement of the hydraulic conductivity (also referred to as coefficient of permeability) of water-saturated coarse-grained soils (e.g., sands and gravels) with k 10-5 cm/s. The test method utilizes low hydraulic gradient conditions. 1.2 This standard describes 2 methods (A and B) for determining hydraulic conductivity of coarse-grained soils. Method A incorporates use of a rigid wall permeameter and Method B incorporates the use of a flexible wall permeameter. A single- or dual-ring rigid wall permeameter may be used in Method A. A dual-ring permeameter may be preferred over a single-ring permeameter to minimize adverse effects of short-circuiting of permeant along the sidewalls of the permeameter (i.e., prevent sidewall leakage). 1.3 The test method is used under constant head conditions. 1.4 The test method is used under saturated soil conditions. 1.5 Water is used as the permeant with the test method.

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Rationale

This standard is needed to replace D2434, which was withdrawn.

The title and scope are in draft form and are under development within this ASTM Committee.