Concrete Recycling Equipment: Complete Guide to Processing C&D Waste
The Concrete Recycling Opportunity
Over 140 million tons of concrete waste are generated annually in the US from demolition, road reconstruction, and construction projects. Rather than sending this material to landfills at $30-$80/ton in disposal costs, recycled concrete aggregate (RCA) can be processed and sold for $8-$20/ton — turning a waste problem into a revenue stream.
The Recycling Process
- Receiving and stockpiling — Concrete from demolition arrives by truck. Charge $5-$15/ton as tipping fees for additional revenue.
- Pre-screening / scalping — Remove dirt, fines, and oversized pieces. A scalping screen handles this step.
- Primary crushing — An impact crusher (preferred) or jaw crusher reduces concrete to 3" minus or smaller. Impact crushers liberate rebar more effectively.
- Magnetic separation — A cross-belt or overhead magnet removes liberated rebar and other steel. Sell the scrap steel for additional revenue ($150-$250/ton for clean steel).
- Screening — A 2-3 deck vibrating screen classifies the crushed concrete into product sizes (3/4", 1.5", 3" minus, etc.).
- Stockpiling — Radial stacking conveyors create large, organized stockpiles for each product size.
Equipment Needed
| Equipment | Purpose | New Cost | Used Cost |
|---|---|---|---|
| Impact crusher | Primary size reduction + rebar liberation | $400,000 – $750,000 | $150,000 – $450,000 |
| Vibrating screener (3-deck) | Product classification | $250,000 – $500,000 | $75,000 – $300,000 |
| Magnetic separator | Steel removal | $15,000 – $40,000 | $5,000 – $20,000 |
| Wheel loader (3-4 yd) | Feeding crusher, loading trucks | $200,000 – $350,000 | $50,000 – $150,000 |
| Stacking conveyor | Stockpile management | $80,000 – $200,000 | $30,000 – $120,000 |
| Water truck / dust suppression | Dust control | $30,000 – $80,000 | $15,000 – $40,000 |
Total startup cost (used equipment): $325,000 – $1,080,000
Recycled Concrete Products and Pricing
| Product | Size | Typical Selling Price | Common Uses |
|---|---|---|---|
| RCA Base | 1.5" minus | $8 – $14/ton | Road base, parking lots, driveways |
| RCA Fill | 3" minus | $6 – $10/ton | Backfill, pipe bedding, structural fill |
| RCA Aggregate | 3/4" clean | $12 – $20/ton | Drainage stone, French drains, concrete aggregate |
| Scrap steel | Rebar and metal | $150 – $250/ton | Scrap recycling |
Revenue Model
A concrete recycling operation processing 300 TPH:
- Tipping fees: $10/ton x 300 TPH = $3,000/hour incoming revenue
- Product sales: $10/ton average x 270 TPH (90% yield) = $2,700/hour
- Scrap steel: 30 TPH (10% of feed) x $200/ton = $6,000/day
- Total daily revenue (8 hrs): $45,600 + $6,000 steel = $51,600
- Operating costs: $15,000 – $20,000/day
- Net daily profit: $31,600 – $36,600
Permitting Considerations
- Air quality permit required in all states (crushing generates PM10 and PM2.5)
- Stormwater management plan for runoff from stockpiles
- Recycling facility license in most states
- MSHA ID and Part 46 training for all workers
- Noise limits — impact crushers are loud (100+ dB). Buffer zones or noise walls may be required
- Testing requirements — many states require regular testing of RCA products to confirm they meet spec
