What Is RCA Gravel? Recycled Concrete Aggregate Explained

TL;DR: RCA (recycled concrete aggregate) is old concrete crushed, cleaned of rebar, and screened into standard aggregate grades. "Crushed concrete" and "RCA gravel" describe the same material family. It compacts as well as or better than virgin stone, generally costs less, and works for driveways, base, backfill, and drainage. The grade matters more than the name.

What Is Recycled Concrete Aggregate?

Recycled concrete aggregate is old concrete that's been processed back into gravel. Instead of hauling a torn-out driveway to a landfill, it goes to a recycling yard and comes out as usable stone.

How it's made at a yard like ours:

1. Collection. Clean concrete from demolition, driveway tear-outs, and slab removal is dropped off. At SMSG, clean concrete (with or without rebar) is accepted free. See free concrete drop-off.
2. Crushing. A crusher breaks slabs down to gravel-sized pieces.
3. Metal removal. Magnets pull out rebar and wire mesh.
4. Screening. The crushed material is sorted into grades.
5. Stockpiling. Each grade is piled separately so you get what you ordered.

For the full walkthrough, see how concrete recycling works.

RCA Gravel vs Crushed Concrete: Same Stuff, Different Name?

Short answer: yes, it's the same material family. The words just get used differently.

Term	What it usually means
Crushed concrete	Broken-up concrete run through a crusher. The plain-English name, most common in East Tennessee.
RCA (recycled concrete aggregate)	Crushed concrete that's been screened and sized for use as construction aggregate. The industry and spec term.
RCA gravel	Casual term for RCA used in a driveway, pad, or landscape job.
Recycled aggregate / "rec con"	Regional names, common in the Midwest.
RCM (recycled concrete material)	A name used in some DOT specs.

When you call a yard, the name matters less than the grade. "Crushed concrete for my driveway" and "RCA crusher run" get you the same pile. "Crushed concrete for a French drain" should get you a clean grade with no fines.

What's in a pile of RCA

• Crushed concrete from dust up to the top size of the grade
• Natural stone from the original concrete mix
• Occasional bits of brick or block
• Rarely, a small rebar fragment the magnet missed

What should not be in it: wood, trash, drywall, soil clumps, or asphalt mixed in. That's why we screen inbound loads and only take clean concrete for crushing.

RCA vs RAP

RCA is recycled concrete. RAP is recycled asphalt pavement (millings). RAP is black, can smell like asphalt on hot days, and partly re-bonds as the binder warms and compacts. RCA is gray and behaves like crushed stone. They're different products for different jobs. Ask us if you need RAP.

RCA Grades and Their Uses

Across the industry you'll see RCA in several grades. Here's what each is for:

Grade	Size	Typical uses
Crusher run (dense-graded)	3/4" to 1.5" minus with fines	Driveways, parking pads, road base, slab and shed base
#57 equivalent	~3/4" to 1", no fines	French drains, pipe bedding, retaining wall drainage, drainage layer
Fines / screenings	3/8" minus	Leveling, paver bedding (where specs allow)
#2 / larger base	2" to 3"	Deep base on soft ground, construction entrances

At SMSG we produce two grades: RCA crusher run (1" minus) and RCA #57. Those cover the large majority of homeowner and contractor jobs. More on sizing in our aggregate sizes guide.

Is RCA As Good As Virgin Stone?

For base, backfill, and driveway work, yes, and in some ways better:

1. Angular pieces interlock. Crushed concrete has rough, jagged faces that lock together under compaction.
2. Residual cement lightly binds. Unhydrated cement in the old concrete reactivates with moisture, giving a mild self-cementing effect over time.
3. Dense gradation packs tight. Crusher run includes everything from dust to stone, so it fills voids and compacts hard.

Many state DOTs allow RCA in road base. The trade-off is appearance and consistency: RCA is gray with occasional colored flecks, and absorbs a bit more water than dense limestone.

Why Contractors and Homeowners Use RCA

• Cost. RCA generally costs less than virgin crushed stone because the raw material is recycled locally. Call (865) 999-0857 for current RCA and delivery pricing.
• Compaction. Packs hard and stays put.
• Local supply. Crushed in Maryville, so less long-haul trucking.
• Environmental. Keeps concrete out of landfills and reduces quarrying.
• Green building credit. Recycled content can help on LEED projects. See using recycled aggregate for LEED points.

Where RCA Works and Where It Doesn't

Good fits:

• Driveways and parking pads (RCA driveway guide)
• Road base and sub-base
• Slab, footing, and shed pad base (best gravel for a shed base)
• Trench backfill and pipe bedding (trench backfill guide)
• French drains with #57 (French drain aggregate guide)
• Retaining wall drainage and backfill (RCA for retaining walls)
• Temporary construction roads and entrances

Poor fits:

• Decorative surfaces where uniform color matters
• New structural concrete mix without testing and an engineer's approval
• High-sulfate soil environments without engineering review
• Jobs whose spec requires virgin stone

RCA vs Virgin Aggregate at a Glance

Factor	RCA	Virgin crushed stone
Cost	Typically lower	Typically higher
Compaction	Excellent	Good
Appearance	Gray, variable	Uniform
Consistency	Good from a clean-source yard	Very consistent
Environmental impact	Lower	Higher
Local availability	Depends on recycling yards nearby	Widely available

Comparing for a driveway specifically? See the RCA vs gravel table in our driveway guide. Comparing to decorative stone? See RCA vs river rock vs #57.

How to Order RCA

Be ready with:

1. The job. Driveway, pad, drain, backfill. If you're not sure of the grade, describe the job and we'll match it.
2. Tonnage. Use the calculator. RCA runs about 1.4 tons per cubic yard. Order extra for compaction.
3. Delivery address and access. Narrow drives, low limbs, or soft ground affect which truck we send. See trucking.
4. Pickup or delivery. You can load out at the yard in your own truck.

Plan for compaction: a compacted layer is thinner than the loose stone you spread, so order roughly 15% to 20% more than the in-place volume.

Where to Get RCA in East Tennessee

Smoky Mountain Sand & Gravel crushes and sells RCA crusher run and RCA #57 at 245 Brookdale Rd, Maryville, TN. Open Mon-Fri 7 AM to 5 PM and Saturday 8 AM to noon. See aggregate for sale, or call (865) 999-0857 for current RCA and delivery pricing.