[updated]: Astm D338518 Pdf

This test method cannot be used directly to calculate the true hydraulic conductivity (coefficient of permeability) of the soil. For soils with a hydraulic conductivity lower than 1 × 10⁻⁵ cm/s, the standard suggests referring to ASTM D5093 . The Concept of the Double-Ring Infiltrometer

Geotextiles are used in a wide array of applications, from road construction and coastal protection to landfill engineering and hydraulic structures. Their primary function is to improve the stability and performance of soil structures by providing filtration, separation, reinforcement, and protection. Given their critical role, it's essential to understand and accurately predict their behavior under various conditions, including hydraulic flow and soil interaction.

Typically an open cylinder that is at least 300 mm (approx. 12 in.) in diameter and at least 500 mm (approx. 20 in.) long. astm d338518 pdf

Volume of water added to the inner ring over timed intervals

Fabricated from smooth, rigid metal (such as steel or heavy-gauge aluminum). Inner Ring: Typically 300 mm (12 inches) in diameter. Outer Ring: Typically 600 mm (24 inches) in diameter. This test method cannot be used directly to

. It is ideal for granular soils, loams, and sandy mixtures, but less suited for very stiff clays or highly fractured rock. Why Use a Double-Ring Infiltrometer?

: This method measures infiltration rate , which cannot be used as a direct substitute for the laboratory-defined saturated hydraulic conductivity (permeability coefficient) of the soil. 3. The Double-Ring Mechanism Explained Their primary function is to improve the stability

: Select a nearly level area. Ensure the test surface is not below the water table. Pre-Soaking

The primary goal of this standard is to measure the rate at which water (or another liquid) enters the soil surface. It is particularly useful for: