A mortar spray machine is a modern construction solution designed to spray cement mortar, dry-mix mortar, and specialty mortars onto walls, ceilings, and structural surfaces under pressure. Compared with traditional manual plastering, mortar spray machines significantly improve working efficiency, ensure uniform thickness, and reduce labor costs. Widely used in building construction, concrete repair, tunnel lining, and industrial coating applications, mortar spray machines have become essential equipment for professional contractors and engineering projects.
Working Principle
- Mortar (dry material or pre-mixed wet mortar) is fed into the hopper
- A screw pump or piston pump inside the machine conveys the mortar continuously
- Compressed air at the spray gun propels the mortar onto the application surface
- A uniform, dense, and well-adhered mortar layer is formed
Common Types
- Dry Mortar Spray Machine
Water is added at the nozzle; suitable for pre-mixed dry mortars - Wet Mortar Spray Machine
Pumps ready-mixed mortar directly, providing more stable output and better surface quality - Screw Pump Type (Most Common)
Continuous conveying, ideal for fine and precise plastering work - Piston Pump Type
High pressure output, suitable for long-distance or high-rise applications
Key Advantages
- High working efficiency (3–5 times faster than manual application)
- Uniform spraying with strong adhesion
- Reduced labor costs
- Less material waste
- Easier control of coating thickness
Frequently Asked Questions About Mortar Spray Machine
Q1: What is a mortar spray machine?
A:
A mortar spray machine is a construction device used to pump and spray cement mortar or dry-mix mortar onto walls, ceilings, or structural surfaces under pressure, improving both efficiency and application quality.
Q2: What materials can be used in a mortar spray machine?
A:
Common materials include:
- Cement mortar
- Dry-mix mortar
- Plaster mortar
- Waterproof mortar
- Fire-resistant mortar
- Repair mortar
The material grain size is usually ≤ 4–5 mm.
Q3: What is the difference between dry mortar and wet mortar spray machines?
A:
- Dry mortar spray machine: Water is added at the nozzle; suitable for dry-mix materials
- Wet mortar spray machine: Pumps pre-mixed mortar; provides more stable output and higher surface quality
Q4: What is the working principle of a mortar spray machine?
A:
The machine uses a screw pump or piston pump to convey mortar continuously, while compressed air at the spray nozzle applies the material evenly to the surface.
Q5: What are the main advantages compared to manual plastering?
A:
- 3–5 times higher working efficiency
- Uniform thickness and strong adhesion
- Reduced labor cost
- Less material waste
- Consistent surface quality
Q6: What is the maximum spraying distance?
A:
Typically:
- Horizontal distance: 20–40 meters
- Vertical distance: 10–20 meters
Actual distance depends on pump type, mortar consistency, and hose diameter.
Q7: What air compressor is required?
A:
Most mortar spray machines require:
- Air pressure: 0.3–0.6 MPa
- Air flow: 3–6 m³/min
Q8: Is special training required to operate the machine?
A:
Basic training is recommended. Operators should understand:
- Mortar mixing ratios
- Spray distance and angle
- Cleaning and maintenance procedures
Q9: How easy is cleaning and maintenance?
A:
Daily cleaning after use is essential. Screw pump components (rotor and stator) are wear parts and should be inspected and replaced regularly.
Q10: What are the common applications?
A:
- Wall and ceiling plastering
- Concrete repair and reinforcement
- Tunnel lining construction
- Waterproofing layers
- Industrial anti-corrosion coatings
Q11: Can the machine be customized?
A:
Yes. Common customization options include:
- Voltage (220V / 380V / 440V)
- Pump capacity
- Hopper size
- Spray gun types
Q12: What is the service life of a mortar spray machine?
A:
With proper operation and maintenance, the machine typically has a service life of 5–10 years, depending on working conditions and material abrasiveness.
Conclusion
In conclusion, a mortar spray machine is an efficient and reliable solution for modern construction and industrial projects. By enabling fast, uniform, and high-quality application of cement and plaster mortars, it helps contractors reduce labor costs, improve productivity, and achieve consistent surface results. Whether for wall plastering, concrete repair, tunnel lining, or special industrial coatings, choosing the right mortar spray machine can significantly enhance project performance and long-term value. For professional contractors and engineering companies, it is a smart investment in efficiency, quality, and competitiveness.
