A crushing machine for concrete recycling is essential for processing demolished concrete into reusable aggregates. Here’s a detailed breakdown of the equipment, process, and considerations:
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1. Types of Crushing Machines for Concrete Recycling
– Jaw Crushers: Primary crushing, ideal for large chunks of concrete.
– *Example*: Nordberg C Series, Terex Pegson XR400.
– Impact Crushers: Secondary crushing, produces well-shaped aggregate (better for softer concrete).
– *Example*: Metso NP Series, Rubble Master RM100.
– Cone Crushers: Tertiary crushing for finer aggregates (less common in recycling).
– Mobile Crushers: Track-mounted units (e.g., Komatsu BR380JG, Sandvik QJ341) for on-site recycling.
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2. Key Features to Consider
– Feed Size & Capacity: Match the crusher to your project’s concrete debris size (typically ≤ 24 inches).
– Mobility: Track-mounted vs. stationary plants (mobile units reduce transport costs).
– Contaminant Removal: Magnetic separators for rebar and screens for dirt/wood.
– Output Gradation: Adjustable settings to produce base material (e.g., ¾” minus) or clean aggregate.
3. Concrete Recycling Process
1. Pre-Sorting: Remove non-concrete debris (wood, metal) manually or with a grapple.
2. Primary Crushing: Jaw crusher breaks large chunks into smaller pieces (~4–6 inches).
3. Secondary Crushing: Impact crusher refines material further (~1–2 inches).
4. Screening: Vibrating screens separate aggregates by size (e.g., 0–½”, ½”–¾”).
5. Contaminant Removal: Magnets extract rebar; air sifters remove lightweight debris.
4. Benefits of Concrete Recycling
– Reduces landfill waste and disposal costs.
– Lowers demand for virgin aggregates (eco-friendly).
– Recycled concrete aggregate (RCA) is cost-effective for road bases, backfill, or new concrete mixes (up to 30% replacement).
5. Top Manufacturers & Models
| Brand | Model | Type | Capacity (TPH) | Mobility |
|——-|——-|——|—————-|———-|
| Metso | Lokotrack