Gunite, also known as “dry process shotcrete”, uses a different process than wet process shotcrete. Gunite machines use air pressure to convey dry material from the machine through the hose to the nozzle where water is added. SPZ Series Diesel engine Dry-mix Shotcrete Machine is a low to high production, continuous-feed material placement unit for dry-mix gunite or refractory materials. It is equally at home underground in a mining environment as it is on a construction jobsite.
Model SPZ-3 SPZ-5 SPZ-9 Output 3m3/h 5.5m3/h 9m3/h Max.conv.dist 200 m 200 m 150 m Water cement ratio <0.4 <0.4 <0.35 Max.Aggregate.size 10 mm 15 mm 20 mm Hose inner size φ42/50 mm φ50 mm φ64 mm Operating air pressure 0.2-0.6 MPa 0.2-0.6 MPa 0.2-0.6 MPa Air consumption 13-14m3/min 15-16m3/min 17-18m3/min Motor power 3 kW(4hp) 5.5 kW(7.5hp) 7.5 kW(10hp) Dimension 1130x1020x540mm 1350x1020x750mm 1500x1320x830mm Weight 520kg 780kg 980kg Basic chassis ①.Tyre ②.Skid ③.Rail-wheel Driving Type Diesel Motor
Introduction Of Wet-Dry Mix Shotcrete Machine
KSP3000 Sereis Wet-Mix Shotcrete Machine is used for dry mix or wet mix concrete spraying procession, Wet-Mix Shotcrete Machine is widely employed in mining, tunnel lining, channel lining, culvert, subway, seismic rehab, specialty projects, hydropower engineering, etc.
Shotcrete machines are divided into two major categories, that is Explosion-proof and non-hazardous , both are based on straight-through-type rotor blanking under the rotor material, can take full advantage of the role of air force jet to ensure the smooth discharge. The rotor chamber and the discharge elbow materials are made of flexible rubber abrasion. When working, under the action of the pressure can be rushed to the self-cleaning effect, reducing adhesive material and congestion, greatly reduced the maintenance workload of the machine. Wet-Mix Shotcrete Machine set the advantages of wet and dry spray machine at home and abroad in one, it is easy to operate, sprays evenly, and has the advantage of a low dust, low rebound. It optimized the working environment, and improved the quality of spray layer.
Applications Of Wet-Dry Mix Shotcrete Machine
1.Shotcrete for Civil Underground Foundation , Express-Way Construction, Railway Construction;
2. Shotcrete for building surface;
3. Shotcrete for Tunneling , Mining ,Hydropower Project;
4. Shotcrete for Slope Stabilization
Features Of Wet-Dry Mix Shotcrete Machine
• electric drive can be combined with tyre chassis.
• Air motor drive or diesel drive combined with single hydraulic power pack.
• Skid or Rail-wheel
Working Principle of Diesel Engine Wet Mix Shotcrete Machine
With "wet-process shotcrete" a low-slump concrete mix is pumped with a Concrete Pump to the end of the pipeline. conveys the pre-dampened mix by compressed air. the pre-concrete is mixed firstly . and then putted into shotcrete machine. This compressed air typically comes from a 165-185cfm air compressor - sold separately. The addition of the compressed air adds velocity to the concrete so it sprays out of the nozzle. This velocity, combined with the low slump of the shotcrete mix, allows the concrete to be sprayed on slopes, vertical walls, and overhead .