Shotcrete Machine

Product Specifications

Technical details and manufacturing context for Shotcrete Machine

Definition

A shotcrete machine is a construction equipment device designed to pneumatically propel concrete or mortar mixtures through a hose and nozzle at high velocity onto surfaces such as walls, ceilings, tunnels, slopes, and other structural forms. It is essential in applications requiring rapid placement, overhead work, or application on irregular surfaces where traditional pouring methods are impractical. The machine is used in both dry-mix and wet-mix shotcrete processes, depending on the model and configuration. In dry-mix systems, the dry material is conveyed through the hose and water is added at the nozzle; in wet-mix systems, the concrete is already mixed with water before being pumped. The choice of system affects the machine's design, operation, and maintenance requirements. Key parameters to consider when selecting a shotcrete machine include output capacity (typically 4–8 m³/h), working pressure (0.5–0.8 bar), hose diameter (50–65 mm), maximum aggregate size (15 mm), power requirement (5.5–7.5 kW), air consumption (10–15 m³/min), conveying distance (200–400 m horizontally, with vertical distance reduced by 50%), hopper capacity (0.2–0.4 m³), weight (800–1200 kg), dimensions (2000×800×1200 mm), noise level (≤90 dB(A) per ISO 4871), and IP rating (IP54 per IEC 60529). These values are typical reference ranges and must be verified for the specific model and application. The machine is typically constructed from steel, high-strength alloys, and wear-resistant polymers to withstand abrasive materials. Proper operation requires matching the machine's air consumption to the compressor capacity and ensuring adequate site access for its dimensions and weight. Regular maintenance is essential to prevent wear and ensure consistent performance. Always consult the manufacturer's documentation for model-specific specifications and safety requirements.

Working Principle

The shotcrete machine operates by feeding a dry or wet concrete mix into a pressurized chamber. Compressed air is introduced, creating a high-velocity stream that carries the material through a delivery hose. At the nozzle, water (for dry-mix systems) or accelerators may be added before the mixture is projected onto the target surface. The impact force compacts the material, achieving good adhesion and density. The machine's output capacity and conveying distance depend on the air pressure and flow rate, which must be matched to the compressor and hose diameter. Proper adjustment of the water or accelerator dosage is critical for achieving the desired mix properties and minimizing rebound. The operator must monitor the material flow and pressure to avoid blockages and ensure uniform application.

Common Materials

Steel, High-strength alloys, Wear-resistant polymers

Technical Parameters

Parameter	Typical range	Notes & selection driver
Output CapacityRequired	4–8 m³/h	Maximum volume of shotcrete material the machine can deliver per hour
Working PressureRequired	0.5–0.8 bar	Operating air pressure required for material projection
Hose DiameterRequired	50–65 mm	Internal diameter of the delivery hose
Maximum Aggregate SizeRequired	15 mm	Largest particle size the machine can handle in the concrete mix
Power RequirementRequired	5.5–7.5 kW	Electrical power consumption of the machine
Air Consumption	10–15 m³/min	Must match compressor capacity
Conveying Distance	200–400 m	Horizontal distance; vertical reduces by 50%
Hopper Capacity	0.2–0.4 m³	Larger hopper reduces refill frequency
Weight	800–1200 kg	Affects transport and installation
Dimensions (L×W×H)	2000×800×1200 mm	Check clearance for site access
Noise Level	≤90 dB(A)	Hearing protection required above 85 dBISO 4871
IP Rating	IP54	Protects against dust and water splashesIEC 60529

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Hopper
Receives and temporarily stores the dry or wet concrete mix before feeding into the system

Material: Steel with wear-resistant lining
Rotary Feeder
Controls the flow of material from the hopper into the pressurized chamber

Material: Cast iron or hardened steel
Pressure Chamber
Mixes the concrete material with compressed air to create the projection stream

Material: High-strength steel
Delivery Hose Part
Transports the pressurized concrete mixture from the machine to the nozzle

Material: Reinforced rubber with abrasion-resistant lining
Nozzle
Directs and controls the spray pattern of the shotcrete, often with water injection for dry-mix systems

Material: Hardened steel or tungsten carbide
Air Compressor
Provides the compressed air required for material projection

Material: Steel and aluminum alloys
Control Panel
Allows operator to control machine functions including material feed rate and air pressure

Material: Steel enclosure with electronic components

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Shotcrete Machine.

Manufacturers of Shotcrete Machine

2 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Henan Gengli Engineering Equipment Co.,Ltd.

Shanghai, CN

Also makes: Concrete Pump, Rotary Drilling Rig

Listed on the company's own website · profile compiled by CNFX from public sources

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Saintyol DAWIN Machinery

Shandong, CN

Also makes: Truck-Mounted Concrete Pump, Self-Loading Concrete Mixer, Concrete Batching Plant and 8 more

Listed on the company's own website · profile compiled by CNFX from public sources

View profile Send enquiry

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Technical documentation

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Frequently Asked Questions

What is the difference between dry-mix and wet-mix shotcrete machines?

Dry-mix machines convey dry material through the hose and add water at the nozzle, while wet-mix machines pump already-mixed concrete. Dry-mix allows better control of water content but produces more dust; wet-mix is more efficient for large volumes but requires a pump. The choice depends on the application and site conditions.

How do I determine the required output capacity for my project?

Output capacity (typically 4–8 m³/h) should match the placement rate needed for the project. Consider the area to be covered, the thickness of the layer, and the available working time. Oversizing may lead to waste, while undersizing can delay work. Consult the manufacturer for guidance based on your specific conditions.

What maintenance is required for a shotcrete machine?

Regular maintenance includes checking and replacing wear parts such as hoses, nozzles, and seals, cleaning the machine after each use to prevent material buildup, lubricating moving parts, and inspecting the air compressor and pressure settings. Follow the manufacturer's maintenance schedule and use genuine spare parts to ensure reliability.

What safety precautions should be taken when operating a shotcrete machine?

Operators should wear appropriate personal protective equipment, including hearing protection (noise level can be up to 90 dB(A)), safety glasses, and dust masks. Ensure proper ventilation in confined spaces. The machine should be operated within its rated pressure and capacity, and all safety guards must be in place. Always follow the manufacturer's safety instructions and local regulations.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	0.3 to 0.7 MPa (air pressure), up to 15 MPa (material pressure)
flow rate:	5 to 30 m³/h (typical range)
temperature:	5°C to 40°C (operating ambient), -10°C to 50°C (storage)
slurry concentration:	60% to 75% solids by volume (optimal range)

Product Specifications

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Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

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