Shotcrete truck, also known as a concrete spraying truck or gunite machine, is a specialized vehicle designed to mix and project concrete at high velocity onto surfaces. Unlike traditional concrete pumps, which deposit concrete through a hose, wet concrete spray trucks use compressed air to propel the mixture, ensuring it adheres firmly to vertical, overhead, or irregular surfaces. This process, known as “shotcreting,” is ideal for applications requiring rapid setting times and high-strength finishes, such as tunnels, slopes, swimming pools, and structural repairs. In the fast-paced world of construction, efficiency, precision, and durability are non-negotiables. When it comes to applying concrete in hard-to-reach areas or complex structures, shotcrete trucks emerge as indispensable assets
How Does a Shotcrete Wet Spraying Trolley Work?
Mixing Chamber: At the heart of the truck is a high-capacity mixing chamber where cement, aggregates, water, and additives are blended into a homogeneous mixture. Advanced systems ensure precise control over the mix ratio, guaranteeing consistency and quality.
Conveying System: Once mixed, the concrete is transported to the nozzle via a robust conveying system. This can be a pump or a combination of pumps and hoses, depending on the truck’s design.
Nozzle and Accelerator: The nozzle is where the magic happens. Here, compressed air accelerates the concrete, while liquid accelerators (if required) are added to expedite setting times. Operators can adjust the air pressure and accelerator dosage to suit the application, ensuring optimal adhesion and strength.
Robotic Arm: Many modern shotcrete trucks feature a robotic arm with multiple joints, offering 360-degree reach and precision. This eliminates the need for scaffolding or manual labor in hazardous areas, enhancing safety and efficiency.
Applications of Wet Concrete Spray Truck
Mining and Tunnelling: In underground mining and tunnel construction, shotcrete trucks provide rapid support to excavated surfaces, preventing collapse and ensuring worker safety. The ability to apply concrete in confined spaces makes them indispensable in these environments.
Slope Stabilization: Erosion-prone slopes and embankments benefit from shotcrete’s ability to create a durable, weather-resistant layer. The quick-setting nature of the concrete minimizes downtime and protects against landslides.
Swimming Pools and Water Features: Shotcrete’s smooth finish and waterproofing properties make it ideal for constructing swimming pools, water tanks, and decorative fountains. The process allows for intricate designs and seamless curves, enhancing aesthetic appeal.
Benefits of Using Shotcrete Truck
Speed and Efficiency: Shotcreting reduces labor costs and project timelines by eliminating the need for formwork and traditional curing times. In some cases, concrete can be walked on within hours of application.
Adaptability: Whether it’s a vertical cliff face or an intricate architectural detail, shotcrete trucks can adapt to any surface. Their ability to spray concrete at various angles and thicknesses makes them suitable for a wide range of projects.
Safety: The use of robotic arms and remote-controlled nozzles reduces the risk of accidents in hazardous environments. Operators can work from a safe distance, ensuring their well-being while achieving precise results.
