Gravel consists of rounded, natural (river) grains, while chippings, or crushed stone, consist of broken, angular grains. Both are used as aggregate in concrete and mortar, and as decorative surfacing materials, but their different grain shapes give them different properties.
Gravel versus Chippings
| Property | Gravel | Chippings |
|---|---|---|
| Grain shape | Rounded | Angular, broken |
| Origin | Natural, river-worn | Crushed from rock |
| Interlock | Loose, mobile | Locks together well |
| Appearance | Smooth, natural | Sharp, faceted |
Application
When to use gravel
- Decorative surfacing — smooth, natural-looking paths and drives
- Drainage — rounded grains give free-draining fill
- Concrete aggregate — rounded stone improves workability
When to use chippings
- Trafficked surfaces — angular grains interlock and resist rutting
- Bound bases and paving — the interlock adds stability
- Concrete — angular grains can improve strength and bond
The choice depends on whether free flow and smooth looks or mechanical interlock and stability are more important.
Related Terms
- Gravel
- Gravel concrete
- Broken stone
- Paving pattern
- Concrete
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