The most direct source is the ASTM International website at www.astm.org. ASTM offers the standard as an individual PDF download through their store. As of the latest data, the standard is 8 pages in length and is published by ASTM Committee D18 on Soil and Rock.
Before using this method, it's vital to know where it applies and where it doesn't.
The ASTM D3385-18 standard provides a detailed methodology for determining the pore size distribution of geotextiles by the dry sieving method. This method involves passing dry soil particles of known sizes through the geotextile sample and measuring the percentage of particles that pass through. The standard outlines the equipment requirements, sample preparation procedures, and testing protocols to ensure consistency and accuracy across different laboratories and testing conditions.
Heavy-duty equipment to drive the rings into the soil uniformly without warping the metal frames. astm d338518 pdf
: Computing canal or reservoir leakage rates and water spreading for groundwater aquifer recharge.
The test requires hauling large volumes of water to remote field sites and monitoring the apparatus for several hours. Accessing the ASTM D3385-18 PDF
ASTM D3385-18, titled the "Standard Test Method for Infiltration Rate of Soils in Field Using Double-Ring Infiltrometer," provides a standardized procedure for this measurement. The most direct source is the ASTM International
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).
(Note: Do not post or share copyrighted standards PDF unless you have the right to redistribute them.)
Acts as a buffer, ensuring the water in the inner ring moves vertically downwards rather than spreading horizontally. Before using this method, it's vital to know
V=ΔQA×Δtcap V equals the fraction with numerator cap delta cap Q and denominator cap A cross delta t end-fraction = Infiltration velocity (typically expressed in mm/minmm/min
The volume of water added to the inner ring is measured at regular intervals (e.g., every 15–30 minutes) to maintain the constant head.
The ASTM D3385-18 method is highly specialized and not suitable for all soil conditions:
It is crucial to purchase standards only from authorized sources to ensure you receive the current, complete, and uncorrupted version. The ASTM Compass online platform provides access to historical standards, redline versions, and workflow tools including annotations and version comparisons.
To quantify the flux of water moving vertically into the soil profile under steady-state conditions.
EN EN 
KO
JA
ZH
ES