|
SURFACE
PREPARATION - Tarmacadam or Asphalt
It
is recommended that a new surface be left for at least two weeks
prior to installing the Broadcast System. Existing surfaces
must be thoroughly brushed to remove any surface dirt. Severely
dirty or contaminated areas may need to be cleaned with a water
jet, however normally this is not necessary. Any oil spillages,
stains, diesel, must be burnt off.
The area
must be totally dry. Any moisture that is present will result
in the Broadcast resin foaming and failing. Any voids in the
surface will decrease the coverage rate of the resin and increase
the amount used on the installation. Therefore these variables
must be taken into account when preparing an area, or ordering
materials.
SURFACE
PREPARATION - Concrete
It
is recommended that a new concrete slab be left for at least
28 days prior to installing the Broadcast System. Preferably
a new concrete slab will have a lightly brushed finish and not
a smooth trowelled surface. A new concrete slab should be acid
etched and thoroughly washed with clean water and allowed to
dry prior to installing the Broadcast Resin. The area must be
totally dry. Any moisture that is present will result in the
Broadcast Resin foaming and failing. Existing concrete surfaces
should be scabbled, planed or shot blasted, prior to applying
the Broadcast Resin.
Under normal
circumstances a concrete surface does not require priming. However
very high wear areas may be primed to ensure a good bond over
the entire area. The primer should be applied using a shorthaired
roller in order to apply as thin as possible. Each 6kg primer
pack should cover circa 25m² and be left for at least one
hour to cure. In any instance, the primed surface must be totally
cured and dry prior to installing the Broadcast Resin. In addition,
once primed, the surface should have the Broadcast Resin applied
within 8 hours.
INSTALLING
PICSBOND BROADCAST SYSTEM ONTO A SOUND AND SUITABLY PRE-PREPARED
BASE
Each
unit of Broadcast Resin consists of two parts, Part A and Part
B. When combined these two units produce 31kgs or resin. The
resin is applied at 1.75kgs per square metre, so each mixed
unit should cover circa 17m² assuming a good, tight, closed
surface. Any small holes or voids in the surface will use more
resin.
Each square
metre could require up to 10kgs of stone to be broadcast onto
the surface, so allow for 10kgs of stone for each square metre
to be installed.
You will
also require:
Paddle mixer
and an electric drill.
Serrated Squeegee.
Cleaning solvents for tools.
50mm masking tape.
Soft broom.
Stiff broom.
Piece of chalk, or similar.
Two or three empty builders buckets.
One pair of flat-soled shoes.
Latex gloves or similar.
It is essential
that the surface to be overlaid is totally dry, as any moisture
will result in the material foaming.
Ensure that
the outer perimeter of the area has been adequately masked and
covered with polythene where required, as time spent at this
stage will make the clean up operation afterwards that much
easier. Remember that the resin is designed to adhere to the
hardstanding, so it will also adhere to windows, door surrounds,
drainage gullies, infact anything that it comes into contact
with.
It is also
worth marking out each 17m² area with some chalk, so that
it is clear how far each mix should go, in order to ensure that
sufficient resin is applied. Conversely, to ensure that not
too much resin is used to avoid running out of materials at
the end of the day
Although the process can be undertaken with just one person,
it is preferable to have at least three people on site. One
person to undertake the mixing, one person to spread the resin
and one person to apply the stone. Remember that once mixed,
the resin will begin to set and therefore there is a need to
continue mixing in order to ensure continuity of pour and reduce
any noticeable joins. The speed of set is dependent on the ambient
temperature. On a hot day the resin must be on the ground and
spread in 15 minutes and stone applied immediately.
Once everything
is ready, mixing may begin. Add the contents of the small container
(Part B) to the contents of the large container (Part A) and
mix with the mixing paddle for about three minutes, ensuring
that the bottom of the container and the sides are also mixed,
until a uniform colour is produced and there are not streaks
in the resin, indicating adequate mixing.
Pour the
resin out onto the area in a suitably sized and shaped line
and begin to use the squeegee to spread the resin. When using
the squeegee, do not pull it towards you, always push it away
as this is a more effective way to spread the resin.
Once the
resin has been evenly spread over the area, commence broadcasting
the stone in thin layers to build a stone rich surface. It is
best to empty half the contents of the bag into a builders bucket,
as it is easier and quicker to broadcast the stone from a bucket
and there is less weight to carry around. Continue monitoring
the stoned area to ensure that no bare areas appear. If resin
rich areas appear, apply more stone as soon as possible and
in any instance before the resin becomes too set to accept any
more stone.
Do not stone
along the live line of the resin. Leave approx 300mm unstoned
until the next batch of resin has been joined and then broadcast
new stone immediately. This will ensure an invisible join between
batches of resin.
Continue
monitoring previously stoned areas to ensure that they are still
stone rich and no resin is showing through.
When an
end of day join is required, simply mask a straight line with
the masking tape and apply the resin up to the tape. Then remove
the tape and apply stone to the area.
When you
are ready to continue with the next adjoining area, simply brush
off the loose stones, apply masking tape to the surface of the
stone on the previous days pour and then apply resin up to the
tape. Once the resin is spread, remove the tape and stone the
area as normal.
Although
it is possible to construct very unnoticeable joins, always
think ahead and place joins where they will be least visible
incase a good join is not achieved.
Once the
installation has been completed, the area is generally swept
off the next day using a stiff broom to remove the excess stone.
The area may be further cleaned using a water jet, or a hose
pipe and broom to remove more loose stone.
FURTHER
TECHNICAL ADVICE
Should
further specific technical advice be required contact the Technical
Department on :-
Phone
UK (01635) 202224
FAX (01635) 202230
Phone International +44(0) 1635 202224
Fax International +44(0) 1635 202230
E-mail info@picsuk.com
Web Site www.picsuk.com
|