home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Spec Disk 1998 Spring 4.0
/
Spec Disk 1998 Spring 4.0.iso
/
text
/
03121gpp.txt
< prev
next >
Wrap
Text File
|
1998-06-10
|
12KB
|
292 lines
SECTION 03121
ARCHITECTURAL CONCRETE FORM LINERS
NOTE ** This section is based on products manufactured by
Greenstreak Plastic Products Co., Inc. located at
the following address:
NOTE ** 3400 Tree Court Industrial Boulevard
NOTE ** St. Louis, MO 63122
NOTE ** Tel: (314) 225-9400 or (800) 325-9504.
NOTE ** Fax: (314) 225-9854 or (800) 551-5145.
NOTE **
NOTE ** SECTION 03121 - ARCHITECTURAL CONCRETE FORM LINERS,
Copyright 1998, The Architect's Catalog, Inc.
NOTE ** Although this guide specification is proprietary,
it does include reference and performance
standards. GREENSTREAK concrete formwork
accessories (form liners, rustication strips,
control joint formers, chamfer strips, and shims)
may be specified in this section or in another
Division 3 Architectural Concrete section. Joints
in vertical and sloping walls may require
waterstops to prevent water intrusion and staining
of the architectural surface. Form liners can be
used for cast-in-place, precast, or tilt-up
concrete construction. This form liner section
must be accompanied by an architectural concrete
specification. The specifier should edit this
specification to suit the project's requirements.
Selection of the appropriate product for the
project is the responsibility of the customer.
PART 1 GENERAL
1.1 SECTION INCLUDES
NOTE ** Delete any items below not required.
A. Rigid plastic and elastomeric form liners for texturing
architectural concrete.
B. Form liner accessories, including but not limited to
fasteners, sealants, rustication and back-up strips, form
release agents, and sealers.
1.2 RELATED SECTIONS
NOTE ** Delete any sections below not relevant to this
project; add others as required.
A. Section 03120 - Architectural Cast-In-Place Concrete
Forms.
B. Section 03330 - Architectural Concrete.
C. Section 03350 - Concrete Finishing.
D. Section 03450 - Plant-Precast Architectural Concrete.
E. Section 03460 - Site-Precast Architectural Concrete.
F. Section 03470 - Tilt-Up Precast Concrete.
1.3 SUBMITTALS
A. Submit under provisions of Section 01300.
B. Product Data: Show compliance with the Contract
Documents. Include manufacturer's installation
instructions.
C. Shop Drawings: Show form liner layout and termination
details. Indicate backup, rustication, reveal, and
chamfer strip locations. Include jointing, form tie
location and pattern of placement. Architect/Engineer's
review will be for aesthetic criteria. Contractor is
responsible for design of formwork and back-up of form
liner for structural stability and sufficiency.
D. Samples: 12 inches (305 mm) square, of each pattern
indicated.
E. Certification by release agent manufacturer of compliance
with local regulations controlling use of VOC's.
1.4 QUALITY ASSURANCE
NOTE ** Because this section accompanies at least one other
architectural concrete section, the requirements of
that section also apply to this work. Enter the
proper section number and title in the blank below.
For your reference, some of the standard
requirements are included in the following
reference documents:
NOTE **
NOTE ** ACI 117 - Standard Tolerances for Concrete
Construction and Materials; American Concrete
Institute.
NOTE **
NOTE ** ACI 301, Chapter 13 - Specifications for Structural
Concrete; American Concrete Institute.
NOTE **
NOTE ** ACI 303R - Guide to Cast-in-Place Architectural
Concrete; American Concrete Institute.
NOTE **
NOTE ** ACI 309, Chapter 7 - Recommended Practice for
Consolidation of Concrete; American Concrete
Institute.
NOTE **
NOTE ** ACI 347, Chapter 5.2 - Recommended Practice for
Concrete Formwork; American Concrete Institute.
A. Mockup: Provide full scale mockup using actual specific
materials, methods and workmanship to be used on the
project.
1. Materials and methods include concrete mix (cement
type, aggregate gradation, slump, water/cement
ratios, plasticizers and additives), forming system
(ties, liner, and formwork), form release agents,
placement rate, form pressures, joint sealing,
vibrating and stripping practices.
NOTE ** Delete all but one of the following 3 paragraphs.
Mock-up configuration may be indicated on drawings.
For small projects, mock-up may be incorporated as
part of finished construction. On large projects,
a separate mock-up is recommended.
2. Select a convenient portion of the final work to
construct as a mockup. Accepted mockup may remain in
the completed work.
3. Construct a separate mockup on-site. Remove mockup
after completion of work.
4. Mockup configuration: As indicated on drawings.
5. Incorporate required formwork accessories and at
least one vertical and one horizontal form liner
joint.
6. On mockup, demonstrate patching and repair procedures
for spalled concrete, and voids caused by
honeycombing or bugholes.
7. Accepted mockup will be standard by which remaining
work will be evaluated for technical and aesthetic
quality. Submit variations from mockup materials or
techniques for approval prior to use.
8. Do not begin construction of formwork until mockup
have been accepted.
1.5 DELIVERY, STORAGE, AND HANDLING
A. Cover form liners to protect from oil, dirt and
ultraviolet exposure.
B. The rigid type of form liners will become more rigid and
less impact resistant below 25 degrees F (minus 3 degrees
C). Handle with extra care at low ambient air
temperature conditions.
PART 2 PRODUCTS
2.1 MANUFACTURER
A. Provide products manufactured by Greenstreak Plastic
Products Co., Inc., St. Louis, MO, 63122. ASD.
Tel: (314) 225-9400 or (800) 325-9504. Fax: (314) 225-
9854 or (800) 551-5145.
NOTE ** Greenstreak has more than 32 available patterns as
shown in our Sweet's catalog. All grades of liner
(Uni-Cast, Multi-Cast, Dura-Cast, Super-Cast, and
Ultra-Cast) achieve the same results for the
selected pattern. The Contractor should select the
grade based on his expected reuse, means and
methods. Many plastic liners with vertical ribs
can be applied inside cylindrical column forms
provided the rib spacing is an even multiple of the
circle circumference.
2.2 MATERIALS
A. Form Liners: Thermoformed rigid polymer alloy sheets:
Greenstreak "Uni-Cast", "Multi-Cast", or "Dura-Cast"; or
urethane elastomeric form liners: Greenstreak "Super-
Cast" or "Ultra-Cast", at contractor's option.
NOTE ** Enter the pattern name or number in the blank. If
more than one pattern is used, it may be simpler to
indicate the patterns on the drawings.
1. For textured finish concrete: Provide special
forming materials to produce form surfaces with face
design, texture, arrangement, and configuration as
shown on drawings; Pattern: _________
2. Provide liners that accommodate form pressures up to
1000 pounds per square foot (478 kPa). Comply with
manufacturer's recommendations for support of large
or deep patterns that may deform under pressure.
NOTE ** For ASTM test physical properties, see Technical
Data table in GREENSTREAK'S Form Liner CSI Spec-
Data brochure.
B. Accessories: Provide the following accessories
manufactured by form liner manufacturer:
NOTE ** Delete accessories below if not required. Select
accessory sizes from bracketed choices. If more
than one variation of each type of accessory is
used, edit the specification to so indicate and be
sure the contractor can tell where each is to be
used, either by noting on the drawings or editing
the specification.
1. Rustication strip with [1-1/2 inch (38 mm)][1-3/8
inch (35 mm)][2-1/8 inch (54 mm)] face; reusable ABS
plastic.
2. Radius chamfer; continuous PVC strip with [1/2 inch
(13 mm)][3/4 inch (19 mm)][1 inch (25 mm)][1-1/2 inch
(38 mm)] leg.
3. Triangle chamfer; continuous PVC strip with [1/2 inch
(13 mm)][3/4 inch (19 mm)][1 inch (25 mm)][1-1/2 inch
(38 mm)] leg.
C. Form Release Agent: Provide Greenstreak 7000 release
agent verified to be compatible with form liner material.
Barrier type release agents are not recommended for
architectural concrete.
PART 3 EXECUTION
3.1 PREPARATION
A. Before placing concrete, verify that lines and levels of
formwork and form liner patterns are within allowable
tolerances.
B. On multiple use liners, clean liner before each use.
C. Apply form release agent at rate recommended by
manufacturer. Schedule concrete pour as soon as possible
after application of release agent to avoid contamination
by precipitation, dust, and debris. Protect reinforcing
seal from exposure to release agent.
3.2 INSTALLATION
A. Construct form liner and accessories to sizes, shapes,
lines and dimensions shown.
B. Provide openings, offsets, keyways, recesses, chamfers,
blocking, and screeds as required to achieve
architectural concrete textured finish.
C. Provide solid butt form liner joints backed up to prevent
deflection.
D. Drill liner to accommodate ties.
E. Anchor liner to form on centers not to exceed 18 inches
(460 mm). Decrease anchor spacing as necessary to
accommodate form stripping pressures without damaging
liner intended for multiple use.
F. Seal form liner joints, form liner accessories' joints,
and tie holes to prevent cement paste from bleeding.
3.3 CONCRETE PLACEMENT
A. Place concrete in manner required to avoid form exceeding
1000 pounds per square foot (478 kPa).
NOTE ** ACI report 347R, titled "Guide to Formwork for
Concrete," gives equations to calculate formwork
pressure as a result of Placement Rate and Concrete
Temperature. GREENSTREAK's plastic form liners are
designed to accommodate form pressures up to a
maximum of 1000 psf without perceptible
deformation. Wide or deep form liner patterns
always require backup strips as indicated in GSK
literature to withstand 1000 psf form pressures.
Usually Type 1, 150 pcf concrete with a 4 inch max
slump, placed with normal internal vibration
techniques to a maximum 4 foot depth, and placed at
a rate of 4 to 6 feet per hour will not deform
GREENSTREAK liners installed per GSK
recommendations. High lifts may exceed allowable
placement rate and create potentially damaging form
pressures. Also, high lifts entrap air which
results in bugholes and other potential surface
defects.
B. Keep concrete lifts less than 24 inches (600 mm) high.
C. Thoroughly vibrate concrete to achieve good
consolidation, and eliminate entrapped air thereby
minimizing voids. Internally vibrate through to previous
lift to avoid lift lines. Avoid contact with the form
liner.
END OF SECTION