Vacuum Concrete: An Overview, Method, and Benefits

Vacuum concrete: what is it?

For hydration, not all of the water used to mix the concrete is needed. Concrete is hence stronger when excess water is removed prior to hardening.

In order to increase the strength of the concrete, excess water is evacuated to create vacuum concrete. Vacuum mats attached to a vacuum pump are used to remove the water.


A concrete mix that is well-suited for formwork is typically used in the process. The application of a vacuum to the surface concrete creates a significant quantity of vacuum to the surface of the concrete because fresh concrete contains water-filled channels that continue the system. As a result, a significant volume of water is drawn out of the concrete at a particular depth. Via porous matting linked to a vacuum pump, the vacuum is produced. Due to the reduction of the final water cement ratio prior to setting, vacuum concrete has higher strength, density, reduced permeability, and increased durability. This is because the final water cement ratio significantly determines the strength of the concrete.

Benefits of Concrete Vacuum Pumping

Compared to regular concrete, vacuum concrete has a number of benefits. Below are a few of the benefits.

• There is a roughly 25% improvement in concrete's ultimate strength.

• Adequate reduction in Concrete's permeability has been effectively reduced.

Even on 20-foot-tall columns, vacuum concrete stiffens so quickly that form-works can be removed within 30 minutes of casting. This has significant economic benefits, especially in precast factories where the forms can be reused repeatedly.

•Vacuum concrete has a 20% better binding strength.

• Vacuum concrete has a greater density.

•Vacuum concrete has a completely pit-free surface, with the top 1/16 inch having exceptional abrasion resistance. These qualities are especially crucial for building concrete buildings that will come into touch with fast-moving water. • It adheres effectively to existing concrete, making it suitable for resurfacing road slabs and other maintenance projects. 

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