System Guide Concrete Resurfacing

Transcription

Concrete Resurfacing
System Guide
by Par chem Constr uction Suppl i es
Concrete Resurfacing System Guide
Resurfacing
Spray-on resurfacing is a 2-3mm topping applied to structurally
sound concrete surfaces that are at least 28 days old.
Resurfacing cures up to 40 Mpa providing a durable, abrasion
resistant surface.
With resurfacing you can add colour, pattern and detailed
designs to your pavement at a fraction of the cost of concrete
removal & replacement. Special effects such as fleck,
highlights, coving and multiple colours can be incorporated to
create unique and striking results.
Resurfacing also allows the applicator to repair the substrate,
repair cracks, correct levels and apply slip resistant textured
surfaces.
Suitable Uses
Residential - driveways, patio’s, paths and swimming
pool surrounds, stairs and slab faces and low retaining
walls.
Small residential facilities – remote mining communities.
Light commercial – pathways and pedestrian access for
businesses, residential streets, bus stops and shopping
centres.
Health Facilities - aged care, hospitals and disability,
ramps, pathways and signage for car parks and parking.
Government/Council Infrastructures – Tafe’s, Schools,
universities, public assets institutional buildings, parks &
parklands and suburban streetscapes.
Distinctive Features and Benefits
Versatility and wide range of uses.
Existing concrete application only – minimum of 28 days
old.
Strength of concrete and flexibility of Acrylic polymers.
2-3mm thick topping.
High strength surface – up to 40mpa which in turn
provides durability and increased wear.
Internal and External applications.
Minimal access – work on top of the pavement not at
side.
A good level of slip and skid resistance can easily be
achieved.
Decorative Features and Benefits

Vibrant colours from the standard colour range.
Bright colours – Yellow, Blue, Green , Red.
Coloured mortar or purp lines.
Crisp sharp lines when stencils are used.
Customised and detailed designs, using multiple colours
side by side.
Create colour contrast for the visually impaired.
Signage for disability car parks, schools.
Fauxstone Finish simulates exposed aggregate without
the environmental hazard/impact.
Can be applied by spraying, trowel or squeegee to obtain
different affects.
Structural Features and Benefits
Can be applied up to 4mm thick.
Allows surface blemishes, faults and cracks to be
treated.
Can be applied over existing stencil, stamped, colour
pigment and exposed aggregate pavements.
Surface textures achieved and varied simply by adjusting
the air pressure through the hopper gun.
Hides many flaws and imperfections.
Texture coat when slippery surfaces are a hazard.
Components
Modifier/ Primer:
Is a water based acrylic primer used to prime the substrate
before application of NXTGEN resurfacing compound.
Improves adhesion of cement based products.
NXTGEN Resurfacing Compound:
Polymer modified cementitious topping which is generally spray
applied over existing concrete surfaces. NXTGEN when mixed
with colour dispersants is used to produce a wide range of
colours and patterns and visually appealing designs.
A variety of finishes can be achieved from smooth to rough
texture simply by adjusting the air pressure on the hopper gun.
A good level of slip and skid resistance can easily be achieved.
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Colour Dispersant/Tints:
Powdered blend of inorganic pigments designed for colouring
the NXTGEN resurfacing compound. Colour dispersants have a
high level of UV resistance.
Mastertone Aqueous Tints can also be used to used to achieve
bright colours such as Bright Yellow, Bright Red, Bright Blue
and Bright Green.
Seal Coat:
Sealer must be applied to the NXTGEN resurfacing compound
on the same day of application. 2-3 coats are crucial to aide
cleanability due to the porous surface texture.
Sealer helps to reduce the level of dirt ingress and enhances
the decorative appearance. Whilst not chemical resistant,
sealer provides protection from contaminants such as petrol
and oil.
Optional Components – Depending on
your design
Stencil Designs:
Pre-cut designs made from water resistant wax paper/
cardboard. The stencil protects concrete immediately under
the paper, to create the ‘purp’ line which remains grey and
uncoloured.
As the stencil attached to the pavement surface with blu-tac the
purp lines are only depressed 1mm or so, which is the depth of
the final spray coats
Filament Tape:
If the required pattern is not available in a preformed stencil
straight patterns can be achieved by using filament tape.
Manual measuring and application of the tape can be time
consuming.
Aqueous Tints:
Water based colour tint used to achieve bright colours when
mixed with the NXTGEN Resurfacing Compound.
Inatone Colour Stain:
A water based stain which is applied to a smooth textured
Resurfacing to achieve a 2 toned look or a highlight colour.
UA20:
is a 2 part high solid, gloss urethane acrylic sealer. Used as
a high gloss finish and advanced protection over resurfaced
floors and pavements. UA20 is an extremely hard wearing,
long life sealer with anti-graffiti capabilities. Non-yellowing with
excellent chemical and solvent resistance.
Properties / Test Results
Wet Pendulum Test:
55 or Class V –
(AS/NZS 4586)
Dry Floor Friction:
1.28 or Class F
(AS/NZS 4586)
Abrasion Index
0.9
(AS/NZS
4456.9)
Compressive Strength
40.5Mpa at 28
days
(AS 1012)
Maintenance
Regular maintenance and cleaning of the surface will prevent
staining and keep the pavement looking at its best.
Reseal every 12 – 18 months depending on the in service
conditions. Please contact a Parchem Branch for instructions
and further advice.
Limitations
This is not a DYI application. All contractors must be
trained in the correct application of NXTGEN Resurfacing
Compounds. Parchem have a dedicated training school
to train new applicators. Parchem welcome enquiries on
phone 02 4350 5000.
Overspray may occur on surrounding surfaces and
dwelling, if preventative steps are not taken
Preparation is extremely important to ensure good
adhesion.
Crack treatment are not guaranteed not to re-crack
and fail. Each crack should be evaluated to determine
if a repair or replacement a localised section will have
greater success whilst under a load.
Do not spray over control joints in the concrete. Tape
must be placed over joints as NXTGEN Resurfacing
compounds will not adhere to the bitumen.
Resurfacing is a decorative coating only and is only
as sound as the substrate. If the substrate cracks the
resurfaced coat will also crack. The substrate must be of
sound structural integrity. Not suitable for pavers, drive
tracks with centre filled in and concrete pavements with
many subsections.
M20:
Premium polyurethane, high solids sealer. M20 is very high
gloss and extremely hard wearing, requiring little maintenance.
Suitable for internal and external applications. M20’s is a
moisture cure, single pack polyurethane which also has antigraffiti capabilities.
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Design Tips
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One colour
Custom design
Safety signage on pavements
Trowel applied with M20 sealer
Stencil and colour
Use of tapes to create designs
Luminance for the vision
impaired
Emphasising with edging &
features
Architectural Designs
Colour highlight on edges
Coloured Mortar or Purp lines
Colours side by side
Trowel applied to achieve the
stamped look
Fauxstone (flecking) to
simulate exposed aggregate)
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Surface finishes
Slip and skid resistance is largely determined by the final finish. Slip resistant surfaces are easy to achieve with NXTGEN
Resurfacing Compounds by varying the pressure in the hopper gun, sands in the mix and application techniques. The following
finishes are widely accepted:
Smooth spray
Sandpaper
Smooth/fleck
Fauxstone
Trowel applied
Please discuss these with your contractor, to ensure that you get the finish best suited to your site and project requirements. On
large projects Parchem strongly your contractor to provide a sample board demonstrating colour, pattern and finish acceptable for
approval before construction commences.
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Installation / application
STEP 1: Preparation of the substrate
STEP 6: Lay Stencil, headers and features
STEP 2: Protection of the surrounds
STEP 7: Spray 1st colour coat, 2nd colour coat with surface
texture to achieve the desired surface finish
STEP 3: Crack treatment, repairs and levelling of the
substrate where needed
STEP 8: Remove Stencils
STEP 4: Prime with Modifier
STEP 9: 2 to 3 coats of sealer are applied to the surface
This system must be applied in accordance with product
application manual and Technical Data. Application methods
supplied in this document are a summary only.
Parchem provide training in Resurfacing application for
Contractors at our Wyong Training Facility. Bookings Required.
STEP 5: Spray base coat
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Product and document supplied by:
Parchem Construction Supplies Pty Ltd
7 Lucca Road, Wyong NSW 2259
Phone: 1300 737 787
www.parchem.com.au
ABN 80 069 961 968
Distributed in New Zealand by: Concrete Plus Ltd
23 Watts Rd, Sockburn 8042 Ph: 03 343 0090
Product System Guide
May 2014