ABC (Aggregate Base Course)
Crushed stone and fines that compact into a firm, stable base layer.
ABC — Aggregate Base Course — is a blend of crushed stone, stone dust, and fines that, when properly compacted, creates an extremely firm and stable base. It is the industry-standard foundation material for driveways, parking lots, and paved roads in North Carolina.
Because ABC interlock-compacts tightly, it resists rutting and washout far better than plain gravel. It is typically placed in 4–6 inch lifts and compacted with a plate compactor or roller. Most NCDOT road base specifications call for ABC.
Common uses
- Driveway base
- Parking lot base
- Road sub-base
- Foundation base for structures
How much will I need?
A 4-inch layer over 1,000 sq ft needs roughly 15 tons. Driveways typically need 8–30 loads.
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