Fill Sand (Dafan)
Technical review pending. This reference record is awaiting verification against current manufacturer documentation. Confirm numerical values, product suitability and installation requirements before specification or use.
Overview
Fill sand, commonly known as “Dafan,” is a compactable material used in construction for backfilling, leveling, and foundational support. It is composed of fine to medium-sized granular particles that enhance soil stability, making it a crucial material for road construction, foundation preparation, and landscaping applications.
Why You Should Use It?
- Excellent Compaction: Ensures soil stability and reduces settlement.
- Enhances Drainage: Prevents water accumulation in construction sites.
- Multipurpose Material: Used in roads, buildings, and landscaping.
- Affordable and Readily Available: Cost-effective for large-scale projects.
- Improves Load Distribution: Provides strong support for structures.
Key Features
| Property | Description |
|---|---|
| Grain Size | Fine to medium (≤ 5 mm) |
| Color | Light brown, beige, or gray |
| Material Composition | Sand, silt, and small gravel particles |
| Moisture Content | Variable (depending on site conditions) |
| Compaction Capability | High |
Uses
- Backfilling: Ideal for filling trenches, foundation gaps, and underground spaces.
- Foundation Support: Enhances stability for roads and buildings.
- Road Base Preparation: Forms a solid base before pavement installation.
- Drainage Systems: Allows water movement, reducing the risk of erosion.
- Landscaping and Grading: Provides an even surface for outdoor spaces.
Density & Composition
| Factor | Value |
|---|---|
| Bulk Density | 1400–1700 kg/m³ |
| Moisture Absorption | 2%–10% (varies by site conditions) |
| Porosity | 20%–35% |
| Clay & Silt Content | ≤ 10% |
Application Recommendations
- Proper Compaction: Use a mechanical compactor for optimal results.
- Moisture Control: Keep moisture levels balanced for better density.
- Layered Installation: Apply in layers for even load distribution.
- Regular Testing: Monitor density and composition for consistent quality.