SECTION 03 53 01
SPECIALTY CONCRETE TOPPING
PART 1 - GENERAL
1.01SECTION INCLUDES
- Application of Portland based, polished cement topping at areas indicated on finish schedule and drawings.
1.02RELATED SECTIONS
A.Section 03 30 00 – Cast-In-Place Concrete
1.03REFERENCES
A.ASTM C109-12 - Standard Test Method for Compressive Strength of Hydraulic Cement Mortars
B.ASTM C348-08 - Standard Test Method for Flexural Strength of Hydraulic-Cement Mortars
C.ASTM C157-08 - Standard Test Method for Length Change of Hardened Hydraulic-Cement Mortar and Concrete
D.International Concrete Repair Institute - Concrete Surface Profile Index
1.04SUBMITTALS
A.Product Data: Submit manufacturer’s data for each component used in specialty concrete topping system.
1.Manufacturer's specifications and test data.
2.Data describing product to be provided, giving manufacturer's name and product name for the specified material proposed to be used.
3.Letter of Acceptance: From manufacturer to verify its acceptance of applicator and acceptance of substrates as satisfactory to receive specialty concrete topping as specified in this section.
B.Provide Manufacturer’s recommended cleaning instructions and cleaning product’s data sheet.
C.Installer’s Qualification: Provide list of 5 completed projects of similar type, size, and complexity.
1.05SYSTEM DESCRIPTION
A.Performance Requirements:
1.System will meet OSHA regulations for coefficient of friction of .50 and ADA regulation for coefficient of friction of .60 for horizontal areas and .80 for ramps.
1.06QUALITY ASSURANCE
A.Installer Qualifications: Firm specializing in decorative concrete floor finishes, with experience in concrete grinding and polishing as specified in this section.
1.Applicator shall have successfully completed minimum 5 projects of at least 5,000 square feet each within preceding 5 years.
B.Manufacturer’s Quality Control:
1.Obtain materials only from manufacturer who will provide qualified technical representative at project site before start of finishing work to inspect and approve substrate acceptability, and to observe and direct finishing operations and to issue specified warranty.
2.Repair unsatisfactory conditions disclosed by the manufacturer's visits to the site.
3.Do not begin or resume work until after re-inspection and approval of repair work by manufacturer.
B.Mock-Ups:
1.Apply mock-up to demonstrate surface finish, color variations and to determine the level of workmanship.
2.Ensure that mock-up meets all requirements of the architect and the owner’s representative.
3.Maintain mock-up during construction in an undisturbed condition as a standard for judging the work.
4.Mock-up shall include control joints, cracks, and saw cut sections of concrete if possible in order to view variations in floor finish.
C.Pre-Installation Conference:
1.Hold pre-installation conference prior to start of polished concrete floor system.
2.Require attendance of parties directly affecting work of this section, including Owner’s Representative, Architect, Concrete Contractor, and specialty concrete topping installer.
3.Review floor flatness, concrete cracks, burn marks from power trowel, grinded areas and patched areas, saw cuts for trenches, and any stains as areas that can directly affect the appearance of the final floor finish.
E.No satisfactory chemical or cleaning procedure is available to remove petroleum stains from concrete, therefore prevention is essential. Following precautions to be taken:
1.All hydraulic powered equipment must be diapered to avoid staining of the concrete.
2.Avoid parking vehicles on the interior slab. If necessary to complete the scope of work, drop cloths will be placed under vehicles at all times.
3.Avoid using pipe-cutting machines on the interior floor slab.
4.Avoid rust stains from placing or storing steel on interior slab
1.07DELIVERY, STORAGE AND HANDELING
A.Deliver materials to site in manufacturer’s original, unopened containers and packaging, with labels clearly identifying product name and manufacturer.
B.Store materials in a clean dry area in accordance with manufacturer’s instructions.
C.Keep products from freezing.
D.Protect materials during handling and application to prevent damage or contamination.
1.08PROJECT CONDITIONS
A.Environmental Requirements: Comply with manufacturers instructions for substrate temperature and moisture content, ambient temperature and humidity, ventilationand other conditions affecting topping performance.
B.Close areas to traffic during and after application for time period recommended in writing by manufacturer.
PART 2 - PRODUCTS
2.01MANUFACTURER
A.Specialty Concrete Topping manufacturer: Floor Seal Technology, 408) 436-8181, – TekFlor.
B.Other Manufacturers:None identified. Equivalent products of other manufacturers will be acceptable in accordance with "or equal" provision specified in 01 60 00.
2.02PRODUCTS
A.Portland based, self-leveling, cement topping exhibiting the following performance criteria:
1.6,100 PSI 28-day compressive strength per ASTM C109-12
2.1,400 PSI 28-day flexural strength per ASTM C348-08
3.Volume change per ASTM C157-08: -0.07% (dry-cure)
4.Density: 128 lbs per cubic foot
B.Two-component, high-modulus, epoxy primer with sand broadcast exhibiting the following performance criteria:
1.Pull-off strength (rupture of concrete): 550 PSI at 28-days
2.Pot-life (at 73 degrees F): 50 minutes
3.Working Time (at 73 degrees F): 3 hours
C.Lithium silicate based sealer to be applied to fully dried Portland cement to provide densified finish suitable for mechanical polishing procedures.
DElectro Static Dissipative Floor Wax applied to completed specialty concrete topping finish to provide abrasion and shock resistance.
2.03ACCESSORIES
A.Diamond-embedded concrete polishing discs to be used with orbital-type concrete polishing machine.
2.04RELATED MATERIALS
- Water: Potable Water.
- Control Joint and Crack Filler: 100 percent solids, two-component, semi-rigid, epoxy-based control joint and crack filler as recommended by the system manufacturer.
PART 3 - EXECTUTION
3.01EXAMINATION
A.Examine surfaces to receive specialty concrete topping. Notify Architect if surfaces are not acceptable, such as those requiring slab-leveling work to bring concrete slab to required Floor Flatness (FF) level. Do not begin application until unacceptable conditions have been corrected.
B.Inspect and verify that the floor does not have curled joints, large cracks, spalling or lippage.
C.Verify that the floor is clean and dry prior to installation.
D.Preparation: Correct conditions detrimental to the proper and timely completion of this work before proceeding with installation.
3.02FLOOR SLAB SURFACE PREPARATION
- Mechanically clean and profile the concrete substrate using bead blasting or other approved preparation technique in order to prepare concrete for specialty topping application. Prepared concrete substrate shall exhibit an ICRI Concrete Surface Profile #3 - 4.
B.Edge-grind using diamond grinders to prepare concrete slab in area not reached by the bead blasting equipment.
- Patch spalled areas and bug holes to provide a smooth andcontinuous surface.
- Seal cracks and joints with semi-rigid epoxy filler as recommended by specialty topping manufacturer.
3.03APPLICATION OF SPECIALTY TOPPING
A.Apply two-component, high-modulus epoxy bonding agent over entire concrete slab receiving specialty topping at a thickness of 10 wet mils.
B.Broadcast clean, dry, coarse (16 - 30 grit) sand to refusal into the primer after 1 – 2 hours, or when recommended by manufacturer based upon ambient temperature and humidity.
C.After at least 16 – 24 hours of drying, sweep and vacuum excess sand from the primer.
D.Mix and apply Portland specialty concrete topping material as recommended by manufacturer at an average thickness of 3/8-inch over entire primed substrate.
E.Allow topping material to dry for at least 24 hours before proceeding to polishing procedure.
3.04POLISHING AND SEALING OF SPECIALTY TOPPING
A.Apply one coat of lithium silicate densifying sealer to fully dry Portlandcement topping to prepare surface for polishing finish.
B.Polish densified Portland topping with diamond-embedded resin discs up to a400 grit finish.
C.Apply two coats of Electro Static Dissipative floor wax and burnish with a high-speed rotary floor buffer equipped with a burnishing pad.
3.04PROTECTION
A.Protection: cover floor withreinforced craft paper runners and tempered hardboard (Masonite) panels, and provide barricades and signs as necessary to prevent construction traffic from soiling and damaging completed installation.
END OF SECTION
03 53 01
CONCRETE FLOOR SEALER
03 53 01 - 1