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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 standard provides a field procedure for measuring the infiltration rate of liquids (typically water) into soils using a double-ring infiltrometer
. This method is primarily used for comparative studies in geotechnical and environmental engineering, such as evaluating potential septic-tank disposal fields, irrigation requirements, and canal or reservoir leakage. Overview of the Method
The test involves driving two concentric open cylinders into the ground and maintaining a constant liquid level in both. Inner Ring
: The volume of liquid added to maintain a constant level in this ring is used to calculate the infiltration rate. Outer Ring : Serves as a buffer to promote one-dimensional, vertical flow directly beneath the inner ring. Infiltration Rate
: Expressed as the volume of liquid per unit area per unit time (usually Key Specifications and Limitations
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: astm d338518 pdf
Report
A report based on the ASTM D3385 standard should include:
Understanding ASTM D3385-18: The Standard for Determining Pore Size Distribution of Geotextiles
The American Society for Testing and Materials (ASTM) is a globally recognized leader in the development and delivery of voluntary consensus standards. Among its vast repository of standards, ASTM D3385-18 stands out for its significance in the geosynthetics industry. Specifically, this standard pertains to the determination of pore size distribution of geotextiles, which are permeable fabrics used in civil engineering applications to stabilize and reinforce soil and other materials.
Writing a comprehensive paper on ASTM D3385-18 requires a detailed understanding of the standard and relevant research areas. Ensure you contribute original insights or perspectives to the field.
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.
I’m unable to provide or share the actual PDF file for ASTM D3385-18 (note the correct numbering—often "D3385," not "D338518") because it is a copyrighted document owned by ASTM International. However, I can tell you a proper story about this standard: what it is, why it exists, and how it's used.
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).
A primary challenge in field infiltration testing is the divergence of flow lines. In a single-ring infiltrometer, water infiltrates vertically but also spreads laterally due to capillary forces and the geometry of the wetting front. This lateral spreading artificially inflates the measured infiltration rate because the wetted area increases with depth.
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.
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The legitimate cost (≈$60) is minor compared to the cost of a failed project or failed regulatory inspection.
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.
In the mid-20th century, civil and geotechnical engineers faced a quiet but critical problem: how to measure the rate at which water could move through soil on-site, without digging it up and bringing it to a lab. Soils behave differently when disturbed. A lab test on a remolded sample might miss the cracks, roots, or layers that actually control water flow in the ground.
In 1975, ASTM Committee D18 on Soil and Rock published the first version of D3385, titled Standard Test Method for Infiltration Rate of Soils in Field Using Double-Ring Infiltrometer. The method was deceptively simple: drive two concentric metal rings into the ground, fill both with water, and measure how fast the water level drops in the inner ring. The outer ring created a buffer zone so water flowed vertically from the inner ring, not horizontally. This gave a true infiltration rate—how fast rainwater, irrigation, or runoff enters the soil.
Over decades, engineers used D3385 to design septic system drainfields, landfill covers, stormwater basins, and irrigation schedules. They found that a single infiltrometer test, done properly, could save millions in over-designed drainage or prevent failures from underestimated infiltration.
The 2018 revision (D3385-18) clarified procedures for different soil types, added guidance on test duration, and emphasized the importance of maintaining constant head (water depth) during the test. It also addressed common errors: ring-driving disturbance, evaporation, and temperature effects.
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.
Today, D3385-18 is still the go-to field method. It’s not glamorous. It involves buckets, stopwatches, and a lot of waiting. But it tells a simple truth about the ground beneath our feet: how fast it drinks water. And that truth underpins safe foundations, clean water, and sustainable land use. ASTM D3385-18 standard provides a field procedure for
What is ASTM D3385-18?
ASTM D3385-18 is a standard test method developed by the American Society for Testing and Materials (ASTM) that covers the determination of the infiltration rate of soil in the field using a double-ring infiltrometer.
Summary of the Report:
The ASTM D3385-18 PDF report provides a detailed methodology for conducting infiltration tests using a double-ring infiltrometer. The test method involves driving two concentric rings into the soil surface, with the inner ring serving as the test area and the outer ring acting as a buffer zone to minimize lateral flow.
The report outlines the requirements for:
Key Findings and Applications:
The ASTM D3385-18 test method is widely used in various fields, including:
Significance of the Report:
The ASTM D3385-18 PDF report provides a standardized approach for determining the infiltration rate of soil, which is essential for:
Overall, the ASTM D3385-18 PDF report provides a valuable resource for professionals and researchers working in the fields of hydrology, soil science, and environmental engineering.
ASTM D3385-18 is the active standard test method for measuring the infiltration rate of soils in the field using a double-ring infiltrometer. It is utilized in geotechnical engineering to assess water penetration using constant, measured flow in two concentric rings, making it best suited for uniform soils with specific hydraulic conductivity. Purchase the official document at ASTM International ASTM International
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.
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 Mooney Viscosity : A measure of the rubber's
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.
ASTM D3385-18 establishes a field procedure using a double-ring infiltrometer to measure the liquid infiltration rate of soils. This constant-head method helps determine vertical soil permeability for environmental and engineering projects by recording water volume over time. For more details, visit ASTM. Standard ASTM D3385-18 - Afnor EDITIONS
ASTM D3385-18 specifies the standard test method for measuring the infiltration rate of soils in the field using a double-ring infiltrometer
. The primary feature of this method is its use of two concentric rings to isolate vertical flow, providing a more accurate measurement of soil drainage and water management capacity. SCIRP Open Access Core Technical Features One-Dimensional Flow Promotion
: The outer ring acts as a buffer zone, limiting the lateral spread of water so that the liquid in the inner ring infiltrates primarily in a vertical, one-dimensional direction. Standardized Apparatus
: The standard requires two open cylinders, typically with diameters of 300 mm (inner) and 600 mm (outer) and a height of approximately 500 mm. Constant Head Method
: Unlike falling-head tests, this standard mandates maintaining a constant liquid level in both rings. The volume of liquid added to the inner ring to keep this level constant is the measurement used to calculate the infiltration rate. Applicability Limits
: It is best suited for relatively uniform fine-grained soils. It may be unreliable in very pervious soils (hydraulic conductivity is greater than 10 to the negative 2 power cm/s) or very impervious soils ( ASTM International Operational Requirements Astm D3385-18 | PDF | Liquids | Soil - Scribd
The ASTM D3385-18 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
This standard, officially titled "Standard Test Method for Infiltration Rate of Soils in Field Using Double-Ring Infiltrometer," defines the equipment and methodology required to obtain reliable field data.
Primary Goal: To measure the rate at which a liquid (typically water) enters the soil surface.
Apparatus: Two concentric rings—usually a 12-inch (300 mm) inner ring and a 24-inch (600 mm) outer ring—driven into the soil to a specific depth.
Key Application: Used for evaluating liquid waste disposal sites, septic-tank fields, irrigation requirements, and potential leakage in canals or reservoirs. Scope and Soil Applicability
The ASTM D3385-18 method is highly specialized and not suitable for all soil conditions:
Ideal Soils: Most effective for relatively uniform, fine-grained soils with moderate to low resistance to penetration.
Limitations: It may produce unreliable results in very pervious soils (hydraulic conductivity >10-2is greater than 10 to the negative 2 power cm/s) or very impervious soils ( <10-5is less than 10 to the negative 5 power
Restrictions: This test cannot be performed if the soil surface is below the groundwater table. For extremely low infiltration rates, experts often refer to ASTM D5093 (sealed inner ring method) instead. The Double-Ring Method: How It Works
The "double-ring" design is critical for accuracy because it forces water in the inner ring to flow one-dimensionally (vertically). The outer ring acts as a buffer, saturating the surrounding soil to prevent lateral (sideways) spreading from the inner measurement area. Requirement under ASTM D3385-18 Method Constant Head Method (water level is kept steady) Ring Depth Driven typically to 150 mm (6 inches) Measurement
Volume of water added to the inner ring over timed intervals Result Unit
Typically expressed in centimeters per hour (cm/h) or inches per hour Practical Procedure Steps
The "18" in D3385-18 denotes the year of approval: 2018. This is the most current active version of the standard as of this writing (prior versions: D3385-09, D3385-03, D3385-94, etc.). Understanding what changed is important if your quality management system requires adherence to the latest revision.