Dump Rock 32–250 mm (Blue or Grey) refers to large, angular quarry rock used in construction, civil engineering, landscaping, and erosion control. The size range indicates that the rocks vary from 32 mm up to 250 mm in diameter. (Bulk Rock)
The colour refers to the natural rock type from the quarry:
Blue Dump Rock – Typically a hard blue-grey dolerite, basalt, or similar igneous rock. It often appears blue when freshly quarried and weathers to grey.
Grey Dump Rock – Usually granite, quartzite, or another hard grey stone.
The colour has very little effect on the engineering performance. It is mainly selected for appearance in landscaping or architectural applications. (Bulk Rock)
| Application | Description |
|---|---|
| Retaining walls | Forms stable rock embankments and gravity walls |
| Gabion baskets | Fills wire baskets for retaining structures |
| Erosion control | Protects riverbanks, canals and slopes |
| Drainage | Allows water to flow while preventing soil erosion |
| Landscaping | Decorative feature rock in gardens and commercial developments |
| Road construction | Used as rock fill and to stabilize weak ground |
| Foundations | Creates a stable base over soft or unstable soils |
A 32–250 mm specification means the load contains a mix of sizes such as:
32–50 mm
50–100 mm
100–150 mm
150–250 mm
The mixed sizes help the rocks interlock, creating a stronger and more stable structure than using one uniform size. (eTenders)
Hard, durable natural stone
Angular edges for excellent interlocking
Long service life
Low maintenance
Suitable for heavy-duty construction
Excellent drainage properties
1 m³ of Dump Rock 32–250 mm weighs approximately 1.6–1.9 tonnes, depending on the rock type and moisture content.
For a business such as 4U Brick a Deal, this product would typically be supplied for:
Landscaping projects
Retaining walls
Gabion walls
Driveway edging
Drainage systems
Bulk fill
Erosion protection
Commercial and residential construction works