What is Vacuum Dewatered Concrete (VDF) or Trimix Flooring?

 What is Vacuum Dewatered Concrete (VDF) or Trimix Flooring?

Figure: Floating Operation for trimix flooring

What is VDF Flooring?

1.  Vacuum Dewatered Flooring (VDF) or Trimix Flooring is a system for laying high-quality concrete floors where the key is dewatering of concrete by vacuum process wherein surplus water from the concrete is removed immediately after placing and vibration, thereby reducing the Water: Cement ratio to the optimum.
2. VDF is a special type of flooring technique to achieve high strength, longer life, better finish, and faster work.
3. this type of Flooring is suitable for high abrasion & heavy traffic movement.
4. the compressive strength of vacuum-treated concrete at the age of 28 days is 40% to 60% higher than that for normal concrete.

Uses of VDF Flooring

1. Industrial floors
2. warehouse floors
3. Parking Area (Stilt, Ramp, podium, etc)
4. Cement Concrete (CC) roads
5. Pavement areas, etc.

Feature / Advantages of Trimix Flooring

1. The compressive strength of Vacuum treated Concrete higher than that for normal concrete.
2. Provide finish Surface hardening & surface hardness increses by %
3. Abrasion resistance increases by 60%
4. Good resistance to weathering
5. Reduces maintenance cost
6. Increase the service life of the concrete
7. Reduces cement consumption by more than 30% as no cement is required 

Disadvantages of VDF 

1. Trained labours are required
2. The initial Cost of VDF is higher as types of machinery like a Vacuum pump, power trowels, floaters, screed vibrators are required. 

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