Astm D338518 Pdf Work -

To get the official PDF, you must purchase it directly from authorized resellers. Be cautious of free versions online, as they may be outdated or unlicensed.

The official standard can be purchased and downloaded digitally as a PDF directly from the ASTM International official website or authorized technical document distributors.

Plotting the infiltration rate against elapsed time yields an infiltration curve. The curve typically drops sharply at the beginning of the test as dry soil matrix suctions pull water in, eventually flattening out into a horizontal line representing the steady-state infiltration rate. Limitations and Practical Considerations

A digital copy can be officially secured via the ASTM International D3385 Product Page or through licensed distributors like ANSI and AFNOR Editions . 1. Scope and Core Applications astm d338518 pdf

Environmental conditions play a massive role in infiltration. The ASTM D3385-18 standard requires the recording of ambient air temperature and water temperature. Because water viscosity changes with temperature (making water flow faster when warm and slower when cold), this data is crucial for adjusting and standardizing your final infiltration rate calculations. Applications and Value of the Data

The ASTM D3385-18 equipment is designed to minimize lateral water flow, ensuring that the measurement in the inner ring reflects a one-dimensional vertical infiltration rate.

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 To get the official PDF, you must purchase

To install the rings without disturbing the soil structure inside the measurement area, ASTM D3385-18 requires the use of a driving cap and a hammer or mallet. A backhoe may be required for larger, heavy-duty rings.

( Standard Test Method for Infiltration Rate of Soils in Field Using Double-Ring Infiltrometer ) outlines a consistent, repeatable procedure for measuring field infiltration. The test utilizes two concentric rings driven into the soil, which are then filled with water or a specific test liquid.

Because the lateral flow requirement is met by the outer ring, the water infiltrating from the inner ring is forced to move almost exclusively in a true vertical direction. Plotting the infiltration rate against elapsed time yields

The inner ring is centered inside the outer ring. Both are driven vertically into the ground, usually to a depth of roughly 15 cm (6 inches).

Acts as a hydraulic barrier or "buffer zone." The water infiltrating from the outer ring satisfies the lateral capillary demand of the surrounding dry soil.

The infiltration rate computed for a specific, short time interval during the test.