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D4083-89 – Standard Test Method Technical Guide
📐 Scope and Referenced Documents
ASTM D4083-89 (Reapproved 2016) presents a standard practice for the description of frozen soils based on visual examination and simple manual tests. This practice is intended for use with Test Method D2487 and Practice D2488, which classify soils but do not cover their frozen state. The procedure follows the “Guide to Field Description of Permafrost for Engineering Purposes” (National Research Council of Canada, 1963) and MIL-STD-619. This standard does not address all safety concerns, and users should establish appropriate safety practices. It offers instructions for specific operations and should be used with professional judgment.
Always use this practice in conjunction with D2487 and D2488 for complete soil characterization, as frozen soils require additional considerations.
⚙️ Visual-Manual Procedure and Key Terminology
The visual-manual procedure involves examining frozen soil components and ice formations. Soil components (e.g., boulders, gravel, sand) are defined per Terminology D653. Key frozen ground terms include:
| 🟦 Term | 📏 Definition | 📐 Context |
|---|---|---|
| Annual frost zone | Top layer subject to annual freezing and thawing | Active layer |
| Frost table | Frozen surface representing thaw penetration level | Irregular surface |
| Frozen zone | Depth range where soil is frozen | Bounded by unfrozen soil |
| Ground ice | Body of clear ice within frozen ground | Varies in size |
| Ice wedge | Wedge-shaped mass in permafrost | Associated with fissures |
Be cautious when identifying frozen zones; ground ice can significantly affect soil behavior and engineering properties.
📊 Referenced Standards
| 📐 Standard | 🎯 Description |
|---|---|
| D420 | Guide for Site Characterization for Engineering Design and Construction Purposes |
| D653 | Terminology Relating to Soil, Rock, and Contained Fluids |
| D1452 | Practice for Soil Exploration and Sampling by Auger Borings |
| D2487 | Practice for Classification of Soils for Engineering Purposes |
| D2488 | Practice for Description and Identification of Soils |
| MIL-STD-619 | Unified Soil Classification System for Roads, Airfields, Embankments and Foundations |
These standards are integral to the application of D4083 for consistent frozen soil description and engineering assessment.
❓ Frequently Asked Questions
🔍 What is the scope of ASTM D4083?
The scope is to provide a visual-manual procedure for describing frozen soils, supplementing other classification standards like D2487 and D2488.
💡 How does D4083 relate to D2487 and D2488?
D4083 is used in conjunction with D2487 and D2488, which describe soils but do not cover their frozen state.
⚡ What are key terms for frozen ground description?
Key terms include annual frost zone, frost table, frozen zone, ground ice, and ice wedge, as defined in the standard.
📌 Which agencies have approved this standard?
This standard has been approved for use by agencies of the U.S. Department of Defense.