Shotcrete System Handles All Underground Jobs
To enhance system flexibility, the new sprayer series is offered in three versions to satisfy different jobsite requirements. The standard version is electrically pow-ered and can include an optional onboard electrically or diesel-driven air compressor. The SPM 4210 WETKRET DUAL DRIVE provides dual diesel or electrical power and is available with an onboard air com-pressor. The 4210 WETKRET ROTOR is equipped to allow use in both wet and dry spraying operations.
Putzmeister says its new low-profile MIXKRET 4 mixer is designed to comple-ment and improve shotcrete applications in mine environments. It provides transport capacity of 4 m 3 (141 ft 3 ) and includes a liquid additive tank for transferring addi-tives to the spray equipment. The machine, powered by a 6-cylinder, 130-kW (176-hp) engine, features a cabin designed for driv-er visibility and also offers a night-vision camera at the rear to enhance safe opera-tion. Compact design and state-of-the-art axles provide excellent mobility and maneuverability in narrow galleries and tunnels. The machine has a hydrostatic transmission with a stepless variable gear motor that ensures an ideal torque:speed ratio, and also features an automatic speed control system for descending ramps while fully loaded at maximum safe speed.