Spec Disk 1998 Spring 4.0

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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