⛰️aggregate

Base Aggregate

Name: Clean Fill Network
Price range: Free
Rating: 4.8

Compactable base material for construction foundations

Typical Price:$15 - $35/ton

Find Base Aggregate Near You Calculate How Much You Need

What is Base Aggregate?

Base aggregate, also known as crusher run, ABC stone (Aggregate Base Course), or road base, is a carefully graded blend of crushed stone and stone fines (dust) that compacts to form an extremely stable foundation layer.

This material is the backbone of durable construction. Whether you're building a driveway, patio, road, or foundation, proper base aggregate creates the stable sub-surface that prevents settling, cracking, and failure.

**Common types include:** - **Crusher Run**: Mixed crushed stone from 3/4" down to dust - **ABC Stone**: Aggregate Base Course meeting specific gradation - **Road Base**: Larger aggregate (2-4") for sub-base layers - **Process Stone**: Similar to crusher run, finer gradation

The combination of larger stones and fine particles is key—the fines fill gaps between larger stones, creating a dense, interlocking matrix when compacted.

Common Uses for Base Aggregate

Driveway and road base

Paver and patio foundation

Building pad preparation

Parking lot sub-base

Concrete slab base

Retaining wall backfill

Utility trench backfill

Foundation preparation

Advantages

Excellent compaction properties
Creates stable foundation
Prevents settling
Good drainage while stable
Cost-effective
Widely available
Easy to work with

Considerations

Not suitable for surface use
Dusty when dry
Requires compaction equipment
Can track into homes
Not decorative

✓ Best For

Driveway foundations
Patio bases
Concrete slab prep
Road construction
Building pads

✗ Not Recommended For

Surface layer
Decorative use
Areas requiring drainage only
Garden beds

Frequently Asked Questions

What's the difference between crusher run and gravel?

Crusher run contains stone dust and fines that compact tightly, while gravel is typically uniform-sized stones without fines. Crusher run is better for bases requiring stability; gravel is better for drainage and decorative use.

How deep should aggregate base be?

For driveways: 4-6" of compacted aggregate. For patios: 4" minimum. For concrete slabs: 4-6" depending on soil conditions. For roads: 6-12" depending on expected loads.

Do I need to compact aggregate base?

Yes, compaction is essential. Use a plate compactor or roller, compact in 2-3" lifts, and achieve 95%+ Proctor density. Uncompacted aggregate will settle and cause surface failures.

Should aggregate base be wet when compacting?

Slightly moist aggregate compacts best—about "optimum moisture content." If too dry, it won't bind; if too wet, it pumps and won't compact. Lightly spray if needed before compacting.