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| GRADE WORK
| REINFOCING STEEL
| COLOUR HARDENER APPLICATION
RELEASE AGENT APPLICATION
| IMPRINTING PROCEDURE
| CONTROL JOINTS
| CURING COMPOUND AND
SEALER | TOLERANCES
All work shall be performed as per plans and specifications and
shall include the supply of all materials such as granular, concrete,
colour hardeners, release agents, imprinting tools and sealers.
Samples shall be available for approval as well as references of
past installations which are comparable to the project in question,
in terms of size and complexity.
- The concrete contractor must satisfy the requirements of the project
in respect to job supervisor/foreman, equipment and qualified labour
force to meet necessary deadlines.
The contractor is to warranty, as noted in the Terms and Conditions
of the Contract, the installation for a period of five (5) years
from the date of installation.
The contractor shall be responsible for all fine grades. ¾” crusher
run shall be used as granular sub-grade and shall be compacted in
two (2) lifts.
Granular sub-grade thickness unless noted, shall be 6” – 8” on driveways
and 3”-4” on all other areas.
All fine grades shall be done to ensure a constant concrete thickness.
Uneven fine grades will not be accepted.
All concrete to be used shall be designed to have a minimum compressive
strength of 32MPa (Patterned Concrete Installations) and 35MPa (Exposed
Concrete Installations) and shall be an approved Patterned Concrete
mix design to insure proper workability for the use of colour hardeners
and imprinting tools.
Concrete coarse aggregate shall consist of a blend of 10mm and 20mm
All mixing water shall be fresh, clean and potable.
Air entrainment agents are to be used although percentages shall
not exceed 8% nor be less than 5%.
Concrete slump shall not exceed 100mm without the use of high range
No poly shall be used as a vapour barrier to the underside of the
Concrete thickness unless noted, shall be 5” (min) on driveways
and 4” (min) on all other areas.
Construction Manager to engage an independent testing agency, as
necessary to perform concrete testing.
Reinforcing steel shall be of high quality industry standard and
have a minimum thickness of 8mm.
Concrete slab shall be reinforced two-ways and tied at spacing of
24”– 30” on center.
Step construction shall have ledge supports consisting of 8” x 15mm
rebar dowels at 12” spacing to be drilled into existing foundation.
Colour to be used shall be a ready to use, dry shake colour hardener
supplied by a Patterned Concrete approved manufacturer
Colour hardener shall be applied at a rate of approximately 60lbs
per 100 square feet. This application of colour hardener shall be
floated into moist concrete, then lightly trowelled prior to the
6.3 Concrete contractor must have a minimum of
five (5) years experience in applying and finishing colour hardeners
on exterior concrete finishes.
Vertical Surfaces: Once concrete is self-supporting, colour hardeners
will be applied as necessary to exposed vertical surfaces. Colour
hardener is to be mixed with water to proper consistency, then trowel
applied at a thickness required by depth of imprinting pattern.
All release agents to be used shall be a dry powder type supplied
by a Patterned Concrete approved manufacturer.
Apply powder release agent evenly over freshly trowelled concrete
surface. At no time shall the release agent be floated or trowelled
into wet concrete.
All imprinted concrete shall be performed by use of pre-moulded
rigid tools manufactured by Patterned Concrete Industries Inc. Tulsa,
Oklahoma (918) 437-6499. www.patternedconcrete.com
The contractor shall be licensed and trained by Patterned Concrete
Industries Inc. Canadian agent – Patterned Concrete Ontario Inc.
Toronto, Ontario (416) 661-3007. www.patternedconcrete.ca
All control joints to be applied by method of dry-cutting with a
diamond blade saw.
Control joints to be installed at a depth of ¼ thickness
The use of expansion joint fiber board shall be used when new concrete
is to be poured against an existing concrete surface.
COMPOUND AND SEALER
- All driveways to be water cured upon control joint installation.
- All imprinted concrete surfaces shall be treated with a deep penetrating
sealer – MATT FINSH.
- All sealers to be supplied by a Patterned Concrete approved manufacturer
and must contain curing compounds.
- All concrete to be sealed must be pressure washed and buffed to
insure a clean surface to allow proper penetration of sealer. All
concrete must be left to cure for a minimum of 3 days and all concrete
must be dry prior to sealing.
- Due to the hand crafted nature of installing Patterned Concrete
on work site, variations in colour hardeners, release agents, texture
and tiny stretch marks on surface are acceptable and allowed.
- Copyright 1997 by PATTERNED CONCRETE Industries,
Inc. A limited license is extended to qualified design professionals
to edit and reproduce this guide specification to incorporate
PATTERNED CONCRETE into a construction specification or purchase
- Issued February 1997. PATTERNED CONCRETE Industries,
Inc. reserves the right to revise product specifications and recommendations.
Contact manufacturer or local contractor for current information.
CONCRETE © is a registered trademark of PATTERNED CONCRETE Industries,