Dry and wet type shotcrete equipment
Dry and wet type shotcrete equipment is widely used in various construction projects, including but not limited to: Tunnel engineering: used for tunnel lining, reinforcement and repair. Mining engineering: used for mine tunnel support, reinforcement and repair. Water conservancy engineering: used for reinforcement and repair of water conservancy facilities such as reservoirs and embankments. Construction engineering: used for reinforcement and waterproofing of basements, basement roofs and other parts.
Dry and wet type shotcrete equipment are important equipment used for concrete construction in the construction industry. They differ in working principles, applicable scenarios and performance characteristics.
1. Dry type shotcrete equipment
Working principle
Dry shotcrete equipment uses compressed air to transport dry concrete materials (cement, aggregate, etc.) to the nozzle.
At the nozzle, dry concrete is mixed with water to form wet concrete, which is then sprayed onto the construction surface.
Applicable scenarios
Applicable to scenarios with high requirements for concrete strength and rapid hardening, such as underground projects such as tunnels and mines.
Applicable to scenarios with low humidity in the construction environment and the need to control the water-cement ratio of concrete.
Performance characteristics
High transportation efficiency and can quickly complete large-scale construction.
Concrete materials are not prone to segregation during transportation, which ensures the uniformity of concrete.
The dust generated during construction is large, and corresponding dust prevention measures need to be taken.
2. Wet type shotcrete equipment
Working principle
Wet shotcrete equipment uses a concrete pump or compressed air to transport pre-mixed wet concrete to the nozzle.
At the nozzle, wet concrete is sprayed directly onto the construction surface.
Applicable scenarios
Applicable to scenarios with high requirements for concrete quality and fine construction, such as water conservancy projects, bridge projects, etc.
Applicable to scenarios with high humidity in the construction environment and the need to maintain the humidity of concrete.
Performance characteristics
The quality of the sprayed concrete is stable, and it is easy to control the water-cement ratio and slump.
There is less dust during the construction process, which is beneficial to protecting the health and environment of construction workers.
The equipment structure is relatively complex and the maintenance cost is high.
3. Comparative analysis
Work efficiency: Dry spraying concrete equipment usually has a higher conveying efficiency and can quickly complete large-area construction; while wet spraying concrete equipment pays more attention to the stability of concrete quality and the fineness of construction.
Material utilization rate: Dry spraying concrete equipment may have a certain material segregation phenomenon during the conveying process, affecting the uniformity of concrete; while wet spraying concrete equipment can maintain the stability and uniformity of concrete and improve material utilization rate.
Construction environment: Dry spraying concrete equipment may produce large dust pollution during the construction process, and corresponding dust prevention measures need to be taken; while wet spraying concrete equipment can reduce dust pollution, which is beneficial to protecting the health and environment of construction workers.
In summary, dry and wet shotcrete equipment each have their own advantages and disadvantages, and the choice of which equipment to use depends on the specific construction needs and scenarios. In practical applications, the most suitable shotcrete equipment should be selected based on comprehensive considerations such as project characteristics, material properties, and construction environment.
