WORK METHODOLOGY / PROCEDURE OF VDF FLOORING
OR TREMIX CONCRETE;
Ø
Chipping and clearing of dead / loose mortar shall be
done.
Ø
Watering shall be done for minimum of 2 to 4 hours before
concreting.
Ø
Fix the panels dividers (as mentioned in
the drawing) in position for diagonally alternative panels.
Ø
The panel’s size should not be more that
3 M X 30 M (90 Sqm) or as per project requirements.
Ø
Dividing strips of MS
Chanel (guide Channel) shall be fixed as per the panel layout to correct line
and level.
Ø
The surface of the guide
channels (on which the surface vibrator is supported), shall be cleaned from
loose concrete/mortar.
Ø
Align the guide channels to
true required level.
Ø
Top of the guide channels
must match with the required slope and finished floor level.
Ø
Guide channels fixing can
be done with Concrete / mortar in advance.
Ø
Thermocol sheet or
equivalent board shall be provided around the column surface to avoid the joint
between tremix concrete and Column and same board shall be removed and filled
with Bitumen or
any other suitable material.
Ø
Before starting Tremix
concrete laid/spread the cement slurry shall be applied on the existing
concrete surface.
Ø
Concreting shall be done in
the sequence of laying in alternative panels.
Ø
Panel casting layout shall
be strictly followed.
Ø
Approved grade of pumpable Concrete
shall be placed at required thickness and distributed evenly and as near the
final level as possible.
Ø
Concrete will be vibrated
with an immersion vibrator in front of screed vibrator.
Ø
Heaping of concrete in
front of screed vibrator will be avoided.
Ø
Ensure that the areas close
to channels and stop ends are carefully vibrated
Ø
Surface vibration should
start as soon as there is enough concrete in front of the screed vibrator.
Ø
Screed Vibrator is to be
pulled from both ends.
Ø
Vacuum dewatering process
must start within 30 minutes from the time of start of concrete pouring.
Ø
The filter pads are placed
in such a way that there is atleast 100 mm (4”) fresh concrete visible around
the filter pads on all four sides.
Ø
Suction pad must be rolled
open over the filter pads and dewatering must then started.
Ø
Physical check of dewatered
surface which should not give foot print while walking to be seen. Excess/less
dewatering not advisable.
Ø
While repeating dewatering
process subsequently, suction pad must be rolled out at least 300 mm over the
vacuum dewatered area.
Ø
The central pipe of the
suction pad shall be the suction house which in turn shall be connected to the
vacuum pump.
Ø
When the pump is started,
vacuum will be created between the top cover and filter pads.
Ø
Excess water from the
concrete will be taken into the vacuum pump tank and discharged through a pipe
away from fresh panel.
Ø
The first finishing
operation shall be done by floating with the skim floater attached with a disc.
Ø
The second finishing
operation shall be troweling with skim floater attached with the troweling
blades.
Ø
Troweling is to be
continued till the smooth surface finish is achieved without floater marks.
Ø
Brooming shall be done to
achieve rough surface.
Ø
Curing arrangement shall be
done for the period of 7 to 10 days by covering with hessian cloth.
Ø
The contraction / sawed joints to be formed at every 3.0
mt to 3.0 mt distance (max.) by grooving with mechanical saw.
Ø
The contraction / sawed joints Shall be
carried out as soon as concrete is ready to accept the saw cut.
Ø
The width of 5 mm and depth of the groove sawed joint
should be 25 mm.
Ø The joints should be filled with Bitumen or
any other suitable material.
Ø Applying Non Metallic Non Color Floor
Hardener sprinkled over green concrete and trowel to acquire broom finish. @
3.5 Kg/ Sq. mt. for car parking area and
7.0 Kg/ Sq. mt. for Ramp area or as per
project specification.
