Vacuum dewatering machine

A vacuum dewatering machine is a construction tool that removes excess water from freshly poured concrete using a vacuum, which is applied to a suction mat placed on the concrete's surface. The system consists of a vacuum pump, suction mats, and hoses that work together to compress the concrete with atmospheric pressure, lowering the water content by 15-25%. This process significantly improves the concrete's strength, density, and durability.

How it works

Surface preparation: After the concrete is poured and leveled, the surface is prepared for the dewatering process.

Mat placement: Filter pads are laid on the wet concrete. A top cover, often with a rubber seal, is placed over the filter pads.

Vacuum application: A vacuum pump is connected to the mats via a hose, and the pump is started.

Water removal: The pump creates a vacuum, and atmospheric pressure compresses the concrete slab. This forces the excess water to be drawn through the filter pads and out of the concrete.

Result: The process reduces the water-cement ratio, making the concrete denser, stronger, and ready to be walked on much sooner than with traditional methods.

Key components

Vacuum Pump: The primary component that generates the negative pressure to draw out water.

Suction Mat: A layered assembly placed on the concrete surface. It includes a filter layer to prevent cement from being sucked out and a protective top cover.

Hoses: Connect the suction mats to the vacuum pump and a separator tank.

Water Separator: A tank that collects the water extracted by the pump to prevent it from re-entering the pump.

Motor: Provides power to the vacuum pump.

Benefits

Improved strength: Reduces the water-cement ratio, increasing the concrete's compressive strength.

Increased durability: Creates a denser, less porous, and more durable finished product.

Faster work: Significantly reduces the drying time, allowing for faster construction progress.

Improved surface finish: Results in a smoother, higher-quality finish on the concrete slab.