ASTM D2434-22 PDF Download

ASTM D2434-22 is a standard test method that focuses on the measurement of the hydraulic conductivity of coarse-grained soils. The purpose of this standard is to determine the coefficient of permeability for granular soils, which can be found in natural deposits or used in construction projects such as embankments and base courses for pavements.

The standard provides two different methods for determining the hydraulic conductivity of coarse-grained soils. Method A involves the use of a rigid wall permeameter, while Method B utilizes a flexible wall permeameter. This allows flexibility in choosing the appropriate equipment based on the specific needs and potential leakage concerns.

The test methods require the use of low hydraulic gradient conditions and constant head conditions, ensuring consistent and accurate measurements. Water is used as the permeant to saturate the test specimen. It's important to note that while hydraulic conductivity is traditionally reported in cm/s in the US, the standard acknowledges the official SI unit is m/s.

Additionally, the standard specifies guidelines for significant digits and rounding of observed and calculated values, which should adhere to the principles established in Practice D6026. These guidelines ensure consistency and accuracy in reporting results.