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Procedure (condensed, practical steps)

The test runs continuously until the infiltration rate stabilizes into a steady state (where the volume consumed per unit of time becomes nearly constant). Mathematical Calculation The infiltration rate (

Infiltration rate tests underpin the design and evaluation of numerous geotechnical systems: astm d338518 pdf

: Two concentric rings—usually a 12-inch (300 mm) inner ring and a 24-inch (600 mm) outer ring —driven into the soil to a specific depth.

Maintain a constant water level (usually between 50 mm and 150 mm) in both rings using Mariotte reservoirs. Outer Ring: Typically 600 mm (24 inches) in diameter

Executing an ASTM D3385-18 compliant test requires standardized field equipment to ensure repeatability and data integrity. 1. The Rings Typically 300 mm (12 inches) in diameter. Outer Ring: Typically 600 mm (24 inches) in diameter.

If you need help with specific details of this testing protocol, please tell me: What or classification are you testing? astm d338518 pdf

= Volume of water added to the inner ring during the interval ( cm3cm cubed = Internal cross-sectional area of the inner ring ( cm2cm squared = Time interval ( hourshours minutesminutes The final result is usually expressed in inches per hour ( in/hrin/hr ) or centimeters per hour ( cm/hrcm/hr

While highly accurate for its intended scope, ASTM D3385-18 has limitations:

ASTM standards are continuously reviewed, updated, and reapproved to reflect modern engineering practices. The "-18" in the designation means that the current active version was last substantively reviewed or updated in 2018.

Fill both the inner and outer rings with water simultaneously. It is critical to maintain roughly equal water levels in both rings throughout the test to prevent lateral pressure differentials.