CA-6 in Illinois
Also sold as Road Base
Also known as: CA6, Grade 8, road pack
Slow-draining prairie clay and winter frost make CA-6 a firm compacted foundation for Illinois driveways, paver work, and pads.
- Size: 3/4 inch minus
- Grading: Graded mix of crushed stone, gravel and binding fines
- Type: Crushed aggregate blend
From $370 for 1 ton, delivery included (larger loads cost significantly less per ton)
Free delivery included
Free delivery anywhere in Illinois
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Weekday delivery, earliest Nov 3
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Everything You Need to Know About CA-6
Size and Grading
- Size
- 3/4 inch minus
- Grading
- Graded mix of crushed stone, gravel and binding fines
- Type
- Crushed aggregate blend
Beneath a paver area, shed pad, or farm lane, CA-6 provides the packed working layer that supports the project above it. Illinois prairie clay can retain water, and northern frost movement can expose weak preparation quickly. The material is suited to work that needs dependable bearing capacity under regular vehicles or equipment.
CA-6 contains crushed aggregate with a range of particle material, including fines that settle into open spaces during compaction. Place it over prepared subgrade and compact it before installing the finished surface. On clay ground, that preparation helps the base stay closely packed instead of allowing traffic to push unevenness up toward the driveway or pad.
Quickly Calculate How Much You Need
Material: CA-6
How to Measure
Measure the length and width of your project area in feet
Decide on depth in inches (2" for landscaping, 4" for driveways)
Enter the values above and we'll calculate the tonnage you need
Need help figuring out the right amount? We can help!
Call or text us at (847) 469-1546 and we'll help you calculate the right quantity for your project.
Not sure how much you need? The Road Base Calculator has depth guides, coverage charts and worked examples for this material.
Common Uses
Road & Highway Construction
For road and highway work, road base sits below asphalt or concrete to support the pavement structure. It spreads vehicle loading over the subgrade, an important consideration where deep frost and freeze-thaw cycling affect the ground.
Driveways for Heavy Use
Driveways carrying heavy trucks, equipment trailers, or regular commercial traffic need the added support of road base. A prepared base helps resist rutting and breakdown under demanding loads.
Jobsite Access Roads
Road base can be placed for either temporary or permanent construction-site routes. It supports heavy equipment and provides a firm surface in wet conditions, helping work continue through changing weather.
Commercial Parking & Loading Areas
Place road base below commercial parking areas, loading docks, and industrial yards that handle routine use by heavy vehicles and equipment.
Why Choose CA-6
Maximum Load Capacity
Road base is intended for high-load use, including industrial equipment and fully loaded dump trucks. When compacted, it distributes weight across the surface and helps reduce point-load failure.
Base Course Aggregate
Select road base according to the depth and compaction needs of your project.
Performance in Changing Weather
Installed and compacted correctly, road base retains its structure during wet, dry, and freeze-thaw weather. Dense compaction reduces water intrusion that may soften and damage less substantial materials.
Cost-Effective for Large Areas
Road base provides commercial-grade support at a fraction of the cost of paved surfaces. For larger access roads, parking areas, and work yards, it offers strength with manageable material costs.
