Astm D338518 Pdf — No Password

Designing retention basins, bioswales, and permeable pavements.

By measuring the rate of fluid volume loss , engineers isolate the one-dimensional vertical infiltration rate. 3. Scope, Applications, and Limitations Ideal Soil Types

This specific test is designed for soils with a hydraulic conductivity between

ASTM D3385-18 is a standard test method that measures the permeability of porous concrete, which is a type of concrete that allows water to pass through it. The test method, titled "Standard Test Method for Permeability of Porous Concrete," provides a procedure for determining the rate at which water flows through porous concrete. This standard is crucial in evaluating the durability and sustainability of porous concrete, which is increasingly being used in various construction applications, including pavements, sidewalks, and parking lots. astm d338518 pdf

The test runs continuously until the infiltration rate stabilizes into a steady state (where the volume consumed per unit of time becomes nearly constant). Mathematical Calculation The infiltration rate (

Acts as a buffer, ensuring the water in the inner ring moves vertically downwards rather than spreading horizontally.

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 Scope, Applications, and Limitations Ideal Soil Types This

Determining optimal water application rates to maximize crop absorption and prevent surface runoff.

Usually around 20 inches (50 cm), allowing them to be driven into the ground while retaining a head of water.

To help tailor further engineering or testing resources, let me know if you are looking to , need help choosing alternative standards for clay soils, or require a template for data logging sheets . Share public link The test runs continuously until the infiltration rate

In 1975, ASTM Committee D18 on Soil and Rock published the first version of , 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.

The volume of water added to the inner ring is measured at regular intervals (e.g., every 15–30 minutes) to maintain the constant head.

It is particularly suited for relatively uniform fine-grained soils with low-to-moderate resistance to ring penetration.

Understanding ASTM D3385-18: The Standard Guide for Infiltration Rate of Soils Using Double-Ring Infiltrometer

Continue the test until the volume of water consumed per unit of time stabilizes into a constant rate (known as steady-state infiltration). 6. Calculations and Data Analysis