Astm D338518 Pdf

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The standard provides a rigorous procedure for measuring the infiltration rate of soils in the field using a double-ring infiltrometer. This method is essential for civil engineers, hydrologists, and environmental scientists to determine how quickly water penetrates a site's soil—a critical factor for designing drainage systems, septic fields, and irrigation networks. Overview of ASTM D3385-18 astm d338518 pdf

Understanding the revision history helps ensure you are using the correct version:

The standard emphasizes that while highly effective, the double-ring method is not universally applicable to all soil profiles. Ideal Soil Conditions This method is essential for civil engineers, hydrologists,

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).

One famous anecdote from the 1990s: a landfill liner design in Florida relied on lab permeability tests showing clay was nearly impermeable. But field tests using D3385 found infiltration rates 100 times higher—because natural cracks and wormholes existed. The design was changed, preventing a major groundwater contamination risk. Ensure it is driven straight down without rocking,

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