Astm D338518 Pdf Jun 2026

For tight clays and clay-silt matrices where the infiltration rate falls below

Continue taking measurements until the infiltration rate stabilizes. A steady state is generally achieved when the infiltration rate remains relatively constant over three consecutive readings. This can take anywhere from 2 to 6+ hours depending on soil composition. Calculations and Data Analysis

Infiltration Rate of Soils in Field Using Double-Ring Infiltrometer1 astm d338518 pdf

Place a driving cap over the outer ring and drive it into the ground to a depth of roughly 150 mm (6 inches). Ensure it is driven straight down without rocking, as rocking creates air gaps along the sides of the ring (causing side-wall leakage).

The primary source is purchasing directly from the ASTM website, where individual or institutional licenses are available. For tight clays and clay-silt matrices where the

The infiltration rate is calculated by dividing the volume of water added to the inner ring by the area of the ring and the time interval, expressed in units like cm/hr or in/hr. 5. Key Considerations and Limitations

Because water viscosity changes with temperature, ASTM D3385-18 recommends correcting the final steady-state infiltration rate to a standard temperature of 20°C (68°F) using viscosity correction factors provided within the official standard tables. Primary Applications of ASTM D3385-18 Calculations and Data Analysis Infiltration Rate of Soils

Comprehensive Guide to ASTM D3385-18: Standard Test Method for Infiltration Rate of Soils Using Double-Ring Infiltrometer

Record the water level or volume consumed at regular, frequent time intervals (e.g., every 5, 10, 15, or 30 minutes).

When designing septic drain fields , engineers need to know exactly how fast wastewater will dissipate into the surrounding ground. The double-ring test prevents system failures and environmental contamination.