The ASTM D3385-18 standard provides the field procedure for measuring the infiltration rate of soils using a double-ring infiltrometer. This method is primarily used for fine-grained soils to assess drainage for irrigation, waste disposal, or reservoir leakage. Core Test Principles
The test uses two concentric open cylinders (rings) driven into the soil. The outer ring limits lateral water spread, ensuring that water from the inner ring moves vertically downward, which provides a more accurate measure of one-dimensional infiltration.
Infiltration Rate: The volume of liquid added to the inner ring to maintain a constant water level over time.
Incremental Infiltration Velocity: The quantity of flow per unit area over a specific time increment, typically measured in cm/h or in/hr. 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: astm d338518 pdf
Test Methods
The standard outlines the following test methods:
Report
A report based on the ASTM D3385 standard should include:
ASTM D3385-18 is the standard test method for measuring the infiltration rate of soils in the field using a double-ring infiltrometer. It is primarily used for fine-grained soils to determine how quickly water or other liquids penetrate the ground surface. Core Test Methodology
The test involves driving two open cylinders (concentric rings) into the ground and filling them with water.
Constant Head Method: Water is maintained at a fixed level in both the inner and outer rings.
Inner Ring Measurement: Only the volume of water added to the inner ring is used to calculate the infiltration rate. The outer ring acts as a buffer to ensure water from the inner ring flows vertically into the soil, preventing lateral spread.
Standard Dimensions: A typical setup uses a 12-inch (30 cm) inner ring and a 24-inch (60 cm) outer ring. Scope and Applicability The ASTM D3385-18 standard provides the field procedure
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 Mooney Viscosity : A measure of the rubber's
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.
The ASTM D3385-18 standard for determining pore size distribution of geotextiles by dry sieving is a critical resource for the geosynthetics industry. It provides a standardized method for evaluating an essential property of geotextiles, which directly influences their performance in filtration and separation applications. Understanding and applying this standard are crucial steps in ensuring the reliability and effectiveness of geotextile applications in civil engineering projects.
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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.
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.
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