VDF TRIMIX Flooring

Vacuum Dewatered Flooring (VDF) TRIMIX is a special type of Flooring Technique to achieve High Strength, Longer Life, Better Finish and Faster Work. This type of floor is suitable for high abrasion & heavy traffic movement. TheVDF is a system for laying high quality concrete floors. The Vacuum Dewatered Flooring or VDF 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 level. This is done using the Vacuum Equipment comprising of Suction Mat Top Cover, Filter pads and Vacuum Pump. The vacuum dewatering system VDF-Tremix Flooring is for laying high quality concrete floors where the cost is very economical. The compressive strength of vacuum treated concrete at the age of 28 days is 40 to 60% higher than that for normal concrete.

PRODUCT FEATURES:

❖ Increased Compressive strength by more than 50%.

❖ Reduced Cement consumption by more than 30% as no cement is required separately for finishing.

❖ Increased Abrasion resistance by more than 50%.

❖ Increased wear resistance.

❖ Minimum dusting & crack formation.

❖ Minimum dry and plastic shrinkage and floor wraps.

❖ Uniform homogeneous floor with High flatness accuracy.

❖ Lower water permeability due to increased density.

❖ High early strength minimizes damage on newly cast floors.

❖ Earlier utilization and Reduced maintenance cost.

❖ Provide finish surface hardening, limits wear & tear

❖ Good resistance to weathering

❖ Reduces maintenance cost

❖ Increase service life of the concrete

❖ Reduced Shrinkage

❖ Reduced Permeability

❖ Abrasion Resistant Flooring

INSTALLATION METHOD:

1. Initial suitable layout of construction joints and isolation joints shall be decided prior to start of Trimix flooring.
2. The surface of the guide channels (on which the surface vibrator is supported), shall be cleaned from concrete. Align the guide channels to true required level. Panel casting layout shall be strictly followed as per step 1.
3. Concrete shall be placed and distributed evenly and as near the final level as possible.
4. Concrete will be vibrated with an immersion vibrator in front of the screed vibrator. Heaping of concrete in front of the screed vibrator will be avoided.
5. Ensure that the areas close to channels and stop ends are carefully vibrated. Ensure not to distribute the concrete with the poker vibrator as it would create a risk of over vibration and segregation.
6. Surface vibration should start as soon as there is enough concrete in front of the screed vibrator. Screed Vibrator is to be pulled from both ends.
7. Vacuum dewatering process must start within 30 minutes from the time of the start of concrete pouring.
8. The filter pads are placed in such a way that there is at least 100 mm (4”) fresh concrete visible around the filter pads on all four sides. Filter pads should be overlapped with each other by at least 250 mm (10”).
9. Suction pad must be rolled open over the filter pads and dewatering must then start. Extent of dewatering is related to thickness of floor concrete i.e. average 4 min. per inch thickness OR
10. physical check of dewatered surface which should not give footprint while walking to be seen. Excess/less dewatering not advisable.
11. While repeating the dewatering process subsequently, the suction pad must be rolled out at least 300 mm over the vacuum dewatered area. Before spreading the suction pad on the dewatered area, it is essential to give one pass of skim floater (with the disc) along the edge of the dewatered concrete.
12. The central pipe of the suction pad shall be the suction house which in turn shall be connected to the vacuum pump. When the pump is started, vacuum will be created between the top cover and filter pads. Excess water from the concrete will be taken into the vacuum pump tank and discharged through a pipe away from the fresh panel.
13. After Vacuum Dewatering, scraping operation shall be made diagonally in two directions over the concrete surface.
14. The concrete which is collected during scrapping shall be used for adjusting small surface irregularities of the vacuum treated surface.
15. The first finishing operation shall be done by floating with the skim floater attached with a disc. The second finishing operation shall be troweling with skim floater attached with the troweling blades. Normally, troweling is to be continued till the smooth surface finish is achieved without floater marks.
16. Curing can be done by ponding, covering with plastic sheets or gunny bags. Curing must be done for at least 7 days.

INSTALLATION MATERIALS:

❖ Manual cutter

❖ Drill

❖ Mixers

❖ Rubber boots

❖ Gloves

❖ Compactors

❖ Levels

❖ Tape measure

❖ Moisture Retarders

❖ Vibrators and Trowels

❖ Brooms

❖ Polishers

❖ Concrete moisture meter

❖ Coarse aggregate

❖ Fine Aggregate

❖ Cement

❖ Water

❖ MS-C channel

❖ Auto level machine

❖ Surface vibrator

❖ Vacuum dewatering pump

❖ Power Floater machine

❖ Wire brush

❖ Concrete pump

❖ Groove cutting machine