Astm D338518 Pdf _hot_
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 astm d338518 pdf
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.
Authorized Sources for the PDF:
| Source | Format | Price (approx.) | Access | |--------|--------|----------------|--------| | ASTM International (www.astm.org) | PDF (secure, watermarked) | $56–$66 (USD) | Instant download upon purchase | | IHS Markit / S&P Global | PDF | $60–$70 | Subscription or single purchase | | Techstreet (Wolters Kluwer) | PDF | $62 | Single-user or multi-user license | | ANSI Webstore | PDF | $60 | Direct download | | University/Corporate subscriptions | PDF | Varies | Through institutional access (e.g., ASTM Compass) | The ASTM D3385-18 standard provides the field procedure
3. Apparatus and Requirements
ASTM D3385-18 specifies stringent requirements for the equipment used to ensure data reliability.
Understanding ASTM D3385-18: A Complete Guide to the Standard Test Method for Infiltration Rate of Soils (Plus PDF Access)
Common Errors and How to Avoid Them (From the Standard)
ASTM D3385-18 explicitly warns about several pitfalls:
| Error | Consequence | Prevention | |-------|-------------|------------| | Lateral leakage | Overestimates infiltration | Ensure outer ring water level equals inner ring level at all times. | | Ring driving smearing | Reduces vertical permeability | Drive rings smoothly, avoid over-hammering. Use sharpened ring edges. | | Temperature variation | Changes water viscosity | Record water temp; apply viscosity correction (provided in the standard). | | Trapped air | Hinders infiltration | Pre-saturate surface or use de-aired water. | | Insufficient test duration | Reads transient, not steady-state rate | Continue until rate stabilizes (can take hours in clays). | Step-by-Step Summary of the Test Method (As Per
Introduction
In the fields of geotechnical engineering, environmental science, and civil construction, understanding how water moves into the ground is critical. Whether you are designing a septic system, a stormwater management facility, an irrigation network, or a landfill cover, the rate at which soil absorbs water—known as the infiltration rate—is a fundamental parameter.
The definitive standard for measuring this property in the field is ASTM D3385-18: Standard Test Method for Infiltration Rate of Soils in Field Using Double-Ring Infiltrometer.
If you have searched for "astm d338518 pdf", you are likely looking for a digital copy of this specific version (2018 edition) for research, compliance, or education. This article will explain what the standard covers, why the 2018 version matters, how to legally obtain the PDF, and keys to correctly applying the test method.
Step-by-Step Summary of the Test Method (As Per ASTM D3385-18)
For engineers and technicians who eventually obtain the PDF, here is a condensed procedural overview:
1. Understand the Standard
- Start by purchasing or accessing the standard through a library or subscription service.
- Read through the document carefully, noting the scope, significance, and use of the test method, the apparatus required, the test specimen preparation, the procedure, and the calculation of results.