Evaluation of asynchronous paddle shafts in reinforced concrete. Telemetry confirms higher fracture efficiency than synchronous shearing.
Evaluation of asynchronous paddle shafts in reinforced concrete. Telemetry confirms higher fracture efficiency than synchronous shearing.
Landfill fee €25/t, fuel consumption 0.27 l/t, and wear factor 0.85 are locked into the shift model.
Evaluation of asynchronous paddle shafts in reinforced concrete. Telemetry confirms higher fracture efficiency than synchronous shearing.
tensile fracturetensile fractureRupture en traction : mode de défaillance du matériau où les arbres du broyeur tirent et déchirent la charge, dominant à haut régime et faible charge spécifique., cutting regimecutting regimeRégime de coupe : mode de fonctionnement où les lames des arbres coupent la charge par cisaillement, préféré pour une fraction de sortie propre., TCOTCOCoût total de possession (TCO) : le coût complet sur la durée de vie incluant le prix d'achat, le carburant, les pièces d'usure, la maintenance et la dépréciation de la valeur résiduelle., OPEXOPEXDépenses d'exploitation (OPEX) : coûts récurrents de fonctionnement du broyeur — carburant ou électricité, remplacement des pièces d'usure, entretien programmé et salaires des opérateurs. — wear cassettewear cassetteCassette d'usure : jeu d'inserts de coupe modulaires et remplaçables montés sur l'arbre du broyeur. Le système d'échange rapide minimise les temps d'arrêt lors de la maintenance., twin-shafttwin-shaftConception double-arbre : deux arbres contra-rotatifs équipés de cassettes de coupe interchangeables fonctionnant en concert pour broyer les déchets industriels.
Traditional synchronous shredders attempt to slice through material. When applied to highly abrasive silicates and reinforced concrete, this destroys the metallurgical integrity of the blades. Arjes subverts this by utilizing an asynchronous drive system with Bonfiglioli planetary gearboxes, running independent shafts between 11 and 35 RPM and sustaining a 160,000 Nm torque capacity.
Instead of cutting, the shafts grip the aggregate and subject it to multi-directional tensile forces. Since concrete has high compressive but low tensile strength, it shatters along its internal fault lines. This "crushing" principle preserves the hard-faced tool edges and drastically reduces the kinetic energy required per ton.
SCU threshold locked at $P_{spike}=345$ bar. Auto-reverse safety margin: 5%. The Bonfiglioli drive train is calibrated to trigger kinetic reversal before reaching the shear stress limit of the paddle shafts. When unshreddable rebar bridges the chamber, the Shredder Control Unit (SCU) detects the hydraulic spike before exceeding the 160k Nm threshold. The automated reverse sequence instantly ejects the contaminant, allowing the over-belt magnet to isolate clean ferrous material without stalling the primary drive train.
Reference machine vs Competitor
Metso LT120 — a mobile jaw crusher positioned for primary reduction of concrete, asphalt, and demolition aggregate, often shortlisted alongside the ARJES Impaktor 1250 D for high-volume C&D recycling yards.
| Spec | ARJES Impaktor 1250 D | Metso LT120 |
|---|---|---|
| Drive concept | Dual-shaft low-speed hydrostatic shredder | Single-toggle high-speed jaw crusher |
| Engine | CAT C13 (Stage V) | CAT C9.3 (Stage V) |
| Drive power (kW) | 400 | 90 |
| Drive power (HP) | 544 | 122 |
| Operating weight (kg) | 37 000 | 25 500 |
