Answer / mitesh patel

# Floors in factories and industries have concrete being the
most versatile of flooring material, has been in use for a
long time. To overcome the deficiencies of concrete a system
was devised to improve the properties of such concrete
floors. This system is "Vacuum Dewatered Floors.
Process:
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. The screed vibrator is run twice to achieve optimum
compaction & leveling. After this a system of lower mats &
top mat is laid on the green concrete & this is attached to
a vacuum pump. This draws out excess water.
Benefits:
1. Compressive strength of floor increases by upto 60%
2. Tensile strength increases by @ 70%
3. Cement consumption is reduced to the extent of 40%, no
cement is required separately for finishing the surface.
4. Abrasion resistance of the floor increases by @ 60%
resulting in less wear and rear of the floor surface.
5. Shrinkage of concrete is reduced and floor wraps less.

Answer / sureshpittas

vdf flooring means Vaccum Dewatering flooring... vdf
flooring is used for smooth surface area of
flooring..Generally vdf flooring used for parking area why
beacause it easy to move freely .vdf flooring is not only
for parking areas but also we can use any floors... And we
can use M25, M30 M35, M40 Concrete...and Hardener bag must
be used for 1SQMETER -3kgs should be used compulsory.

Answer / p.simhachalam

sir how to repair the vdf top surface ,if in case damaged

how to calculate stair case landing slab bottom shuttering marking,angle of stair case? top landing length-1250mm treads length-2700mm(9X300mm) rise length-1500mm(10X150mm top landing level +1.5m lvl bottom level-0.00m lvl

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