Application of vacuum pump in vacuum grouting process Text: The main application of piston vacuum pump in vacuum grouting is that one end of the channel uses a piston vacuum pump to vacuum the channel to produce a vacuum of about -0.1PaM, and then use a grouting pump to The optimized special cement slurry is poured from the other end of the tunnel until it fills the entire tunnel, and a positive pressure of ≤0.7Mpa is applied to improve the fullness and compactness of the prestressed tunnel grouting.
Vacuum grouting is a commonly used process in bridge concrete structures, and grouting of the ducts is a very critical link. The traditional grouting process will cause corrosion and component expansion after long-term use, which poses great safety risks.
Main technical advantages of piston vacuum pump for vacuum grouting process
- In the vacuum state, the air and water in the pores and the bubbles mixed in the cement slurry are eliminated, reducing pores and bleeding.
- During the grouting process, the channel has a good sealing performance, so that the pressure of the slurry and the filling of the entire channel are guaranteed.
- The optimization of process and slurry eliminates the occurrence of cracks and ensures the fullness and strength of grouting.
- The vacuum grouting process is a continuous and rapid process, which shortens the grouting time.
Vacuum grouting is a new technology in the construction of post-tensioned prestressed concrete structures. It largely solves the problems left by the traditional grouting process. The use of piston vacuum pump grouting technology improves the safety and durability of post-tensioned prestressed concrete structures. Effective measures.
