The movement of water through the soil surface, known as infiltration, is a fundamental hydrologic process. It governs the partitioning of rainfall into surface runoff and subsurface storage, influencing everything from flood forecasting and irrigation efficiency to the design of stormwater management systems and landfill liners. Accurate quantification of the infiltration rate is essential for civil engineers, hydrologists, and environmental scientists.
ASTM D3385-18, officially titled “Standard Test Method for Infiltration Rate of Soils in Field Using Double-Ring Infiltrometers,” serves as the industry benchmark for this measurement. By utilizing a concentric ring apparatus, the method aims to minimize lateral flow divergence, thereby providing a more accurate representation of the vertical hydraulic conductivity of the soil. This paper dissects the standard, offering guidance on its practical application and theoretical basis.
The ASTM D3385-18 PDF is an essential document for geotechnical engineers, environmental consultants, and construction quality control personnel. It provides a standardized, repeatable, and defensible method for measuring soil infiltration rate in the field.
To summarize:
Once you have your licensed PDF, combine it with proper field training and quality control (per ASTM D3740) to produce reliable infiltration data that will stand up to peer review and regulatory scrutiny.
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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.
ASTM D3385-18 is the recognized international standard for determining the infiltration rate of soils in the field using a double-ring infiltrometer. This method is essential for geotechnical and environmental engineering, providing data for septic tank design, irrigation planning, and groundwater recharge studies. Core Objectives of ASTM D3385-18
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:
Waste Disposal: Evaluating the suitability of sites for liquid waste or septic systems.
Hydrology: Understanding groundwater recharge and potential canal or reservoir leakage. astm d338518 pdf
Agriculture: Determining irrigation requirements and drainage efficiency. The Double-Ring Infiltrometer Apparatus
The test uses two concentric open cylinders, typically made of stainless steel.
Inner Ring: Usually 12 inches (300 mm) in diameter. This is where the measurement takes place.
Outer Ring: Usually 24 inches (600 mm) in diameter. It acts as a buffer to limit the lateral spread of water, ensuring that water from the inner ring moves in a one-dimensional, vertical flow for more accurate results. Test Procedure and Methodology
The ASTM D3385-18 standard mandates the constant head method.
Infiltration Rate of Soils in Field Using Double-Ring Infiltrometer1
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ASTM D3385-18 is a standardized field test method published by ASTM International (formerly known as the American Society for Testing and Materials). The full title is:
Standard Test Method for Infiltration Rate of Soils in Field Using Double-Ring Infiltrometer
The double-ring infiltrometer is the core apparatus. It consists of two concentric metal rings driven into the soil. Water is maintained at a constant level in both rings. The inner ring measures the vertical infiltration rate, while the outer ring creates a buffer zone to minimize lateral spread of water, ensuring that flow in the inner ring is predominantly one-dimensional (vertical).
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. The movement of water through the soil surface,
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.
Introduction
Polybutadiene rubber (BR) is a synthetic rubber used in various applications, including tire manufacturing, industrial products, and consumer goods. The ASTM D3385 standard provides a framework for evaluating the properties of BR to ensure its quality and performance.
Scope
This standard covers the evaluation of properties of polybutadiene rubber (BR) including:
Significance and Use
The evaluation of BR properties is crucial for:
Test Methods
The standard outlines the following test methods:
Report
A report based on the ASTM D3385 standard should include:
ASTM D3385-18 establishes a standard field method for measuring soil infiltration rates using double-ring infiltrometers to assess hydraulic conductivity. This procedure involves maintaining a constant water head in concentric rings, measuring vertical water flow to determine the infiltration rate [1]. You can access the full standard through the ASTM website. Once you have your licensed PDF, combine it
ASTM D3385-18 standard provides a field procedure for measuring the infiltration rate
of soils using a double-ring infiltrometer. This method is most effective for relatively uniform, fine-grained soils and is typically used for applications like irrigation studies, septic field evaluations, and stormwater management. The University of Utah 1. Equipment and Site Preparation
: Two concentric open cylinders (typically 300 mm and 600 mm in diameter). You will also need driving caps, a hammer, a depth gauge, and a liquid supply (usually water). Site Choice
: Select a nearly level area. Ensure the test surface is not below the water table. Pre-Soaking
: In some cases, pre-soaking the soil is recommended to reach saturation before formal measurement begins. ASTM International 2. Ring Installation
: Drive the outer ring into the soil to a depth of approximately 150 mm (6 in.). Concentric Placement
: Center the inner ring inside the outer ring and drive it to a similar depth. Vertical Alignment
: Ensure both rings are vertically level to maintain uniform water pressure. The University of Utah
Infiltration Rate of Soils in Field Using Double-Ring Infiltrometer1
ASTM D3385-18 establishes a standard field procedure for measuring soil infiltration rates using a double-ring infiltrometer, essential for engineering applications like waste disposal and stormwater management. It is best suited for uniform, fine-grained soils where a constant head of liquid is maintained to measure downward vertical flow. For complete technical specifications, visit ASTM International.
ASTM D3385-18 outlines the field procedure for measuring soil infiltration rates using a double-ring infiltrometer to evaluate liquid penetration, particularly for engineering and environmental applications. This standard test method maintains a constant hydraulic head in concentric rings to measure one-dimensional vertical flow in relatively uniform, fine-grained soils. Purchase the official standard and obtain the PDF from ASTM International.
Depending on your project, other standards may be more appropriate:
| Standard | Focus | Key Difference | |----------|-------|----------------| | ASTM D5093 | 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. |
For most North American regulatory and engineering applications, ASTM D3385-18 remains the gold standard.