Astm D338518 Pdf -
The standard finds widespread use across numerous industries and applications:
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.
This paper provides an in-depth examination of ASTM D3385-18, the standard test method designated for determining the infiltration rate of soils in the field using a double-ring infiltrometer. As water infiltration is a critical parameter in geotechnical engineering, hydrology, agriculture, and environmental remediation, the accuracy of field data is paramount. This document explores the theoretical underpinnings of the double-ring method, details the apparatus and procedural requirements set forth by the ASTM standard, discusses the calculation of infiltration rates, and analyzes the sources of error and limitations inherent in the methodology. Furthermore, this paper addresses the significance of the 2018 revision in the context of modern engineering practices and compares the method with alternative infiltration measurement techniques.
| Standard | Focus | Key Difference | |----------|-------|----------------| | | Field infiltration using single-ring infiltrometer | No outer ring; corrects for lateral flow mathematically. | | ASTM D5126 | Laboratory measurement of hydraulic conductivity (constant head) | Uses undisturbed soil cores. | | ASTM D3385 (older versions) | Same method but outdated references | No longer compliant with current specs. | | ISO 14388-2 | Double-ring infiltrometer (international version) | Different ring dimensions and reporting format. |
Acts as a buffer, ensuring the water in the inner ring moves vertically downwards rather than spreading horizontally. astm d338518 pdf
The ASTM D3385-18 standard is copyrighted material. Authorized copies in PDF or hardcopy format can be purchased directly from the or through licensed technical document distributors (such as IHS Markit or Techstreet). Academic institutions and engineering firms often provide access to these standards through institutional database subscriptions.
Testers maintain a constant water level (head) throughout the duration of the test.
ASTM standards are continuously reviewed, updated, and reapproved to reflect modern engineering practices. The "-18" in the designation means that the current active version was last substantively reviewed or updated in 2018.
Infiltration rates determine irrigation efficiencies, helping farmers design center-pivot or flood irrigation layouts that minimize water logging and surface runoff. The standard finds widespread use across numerous industries
ASTM D3385-18 is a standard test method provided by ASTM International (formerly known as the American Society for Testing and Materials). This specific standard is titled "Standard Test Method for Permeability of Porous Concrete." The test method covers the determination of the permeability of porous concrete, which is crucial for evaluating its potential to allow water to pass through, an important characteristic for applications like pavement surfaces, parking lots, and other infrastructure projects where water drainage is a concern.
Concise takeaway
The double-ring infiltrometer addresses this through the "buffer ring" principle. An outer ring is used to saturate the soil around an inner ring. The theory posits that the water flowing laterally from the inner ring is countered by the hydraulic head of the water in the outer ring. Consequently, the flow from the inner ring is forced to move primarily in a vertical direction. Therefore, the measurement of water level drop within the inner ring provides a more accurate estimation of vertical infiltration capacity.
ASTM D3385-18, the "Standard Test Method for Infiltration Rate of Soils in Field Using Double-Ring Infiltrometer," outlines a field procedure using a 12-inch inner and 24-inch outer ring to determine soil permeability. The constant-head method is suitable for measuring liquid infiltration in various soils, excluding those with high gravel content or excessive shrinkage. The full standard can be purchased directly from the ASTM Store . This document explores the theoretical underpinnings of the
A Comprehensive Guide to ASTM D3385-18: Field Measurement of Soil Infiltration Rate
ASTM D3385-18 explicitly warns about several pitfalls:
Assessing the efficiency of septic-tank disposal fields.
Repeat the process for the inner ring, driving it to the same depth. Step 3: Pre-Wetting and Setup Place splash guards on the soil surface inside both rings.
Small plates placed inside the rings to prevent soil erosion when water is poured into the setup. 3. Ancillary Tools
The test involves driving two concentric open cylinders into the ground and maintaining a constant liquid level in both. Inner Ring
