This system is called Vacuum Dewatered Floors (VDF) or Tremix Flooring. In this system, concrete is poured in place & vibrated with a poker vibrator. Then a screed vibrator is run over the surface, supported on channel shuttering spaced 4.0 meters apart. Why VDF flooring is used? Image result for vdf flooring This is a special technique to do the Concrete Flooring to increase the Compressive Strength, Tensile Strength, Abrasion Resistance and to minimize the Shrinkage and Floor Wraps.VDF Flooring results in High Strength, Longer Life, Better Finish and Faster Work.