UNIVERSITY SERVICES ANNEX James Madison University Harrisonburg, Virginia State Project Code: Architect s Project Number:

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1 SECTION POLISHED CONCRETE FLOOR FINISHING PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. Provisions of the Contract and of the Contract Documents apply to this Section. 1.2 DEFINITIONS A. Polished Concrete: The multi-step operation of mechanically grinding, honing, and polishing a concrete surface using diamond abrasives in conjunction with a chemical densifier. Burnishing that depends on chemical polish for the finish is not acceptable. B. Other Terminology: As defined by the Concrete Polishing Association of America. 1.3 REFERENCES A. American National Standards Institute: 1. ANSI/NFSI B101.1, Test Method for Measuring Wet SCOF of Common Hard-Surface Floor Materials. 2. ANSI/NFSI B101.3, Test Method for Measuring Wet DCOF of Common Hard-Surface Floor Materials. 1.4 PERFORMANCE CRITERIA A. Static Coefficient of Friction: For polished concrete walkway surfaces, achieve following coefficient of friction by field quality control testing in accordance to ANSI/NFSI B101.1: 1. Minimum 0.42 wet SCOF, moderate traction. B. Dynamic Coefficient of Friction: For polished concrete walkway surfaces, achieve following coefficient of friction by field quality control testing in accordance to ANSI/NFSI B101.3: 1. Minimum 0.35 wet DCOF, moderate traction. 1.5 SUBMITTALS A. Product Data: For each type of product indicated. Include technical data sheets and complete installation instructions. B. Qualification Data: For qualified Installer. and Auditor. C. Maintenance Data: For polished concrete flooring to include in maintenance manuals. D. LEED Submittals: Refer to Division 1 Section Sustainable Design Requirements. 1.6 QUALITY ASSURANCE A. Installer Qualifications: An employer of workers trained and approved by manufacturer of polished concrete floor finishing systems. POLISHED CONCRETE FLOOR FINISHING

2 B. Walkway Auditor Qualifications: Certified by CPAA or NFSI to test bonded abrasive polished concrete floors for dynamic and static coefficient of friction according to ANSI B101.1 and B C. Source Limitations: Obtain components including penetrating hardeners, sealer, joint filler, and accessory materials for polished concrete floor finish system from same manufacturer. D. Mockups: Build mockups to demonstrate aesthetic effects and set quality standards for materials and execution. 1. Build mockups of full-thickness sections of concrete slab on grade with specified polish finishing system to demonstrate typical joints; surface color, pattern, and texture; curing; and standard of workmanship. 2. Concrete mix design and finishing shall be identical to that used in the Work. 3. Placement, finishing, and polishing work shall be performed by same personnel as will place and finish concrete for Project. 4. Build mockups of polished concrete in the location directed by Architect and not less than 96 inches by 96 inches. 5. Notify Architect seven days in advance of dates and times when mockups will be constructed. 6. Obtain Architect's approval of mockups before starting construction. 7. If Architect determines that mockups do not meet requirements, demolish and remove them from the site and cast others until mockups are approved. 8. Maintain mockups during construction in an undisturbed condition as a standard for judging the completed Work. 9. Demolish and remove mockups when directed. E. Concrete Preinstallation Conference: Attend preinstallation conference. 1. Verify that the concrete slab will meet the minimum compressive strength and have a minimum flatness rating required. 2. Confirm that the General Contractor through coordination with other trades will be responsible for the protection of the slab during construction to ensure that no contaminants such as (but not limited to) oil, grease, paint, adhesives, flux, rust, etc. will be present at the time of concrete polishing. 3. Review methods and procedures related to polished concrete floor finishing, including but not limited to, the following: a. Concrete mixture design. b. Curing method. c. Quality control of concrete materials and polished floor finishing construction practices. 1.7 DELIVERY, STORAGE, AND HANDLING A. Deliver materials in original packages and containers, with seals unbroken, bearing manufacturer's labels indicating brand name and directions for storage, mixing with other components, and application. POLISHED CONCRETE FLOOR FINISHING

3 B. Store materials in a clean, dry area to comply with manufacturer's written instructions to prevent deterioration from moisture or other detrimental effects. C. Keep products from freezing. D. Dispense special concrete finish materials from factory numbered and sealed containers. Maintain record of container numbers. E. Protect materials during handling and application to prevent damage or contamination. 1.8 PROJECT CONDITIONS A. Environmental Limitations: 1. Comply with manufacturer s written instructions for substrate temperature and moisture content, ambient temperature and humidity, ventilation and other conditions affecting installation performance. B. Concrete Slabs: 1. Concrete must be cured a minimum of 28 days or as directed by the manufacturer before application of grinding and polishing process can begin. C. Close areas to traffic during and after floor application for time period recommended in writing by manufacturer. PART 2 - PRODUCTS 2.1 MANUFACTURERS A. Available Manufacturers: Subject to compliance with requirements, manufacturers offering polished concrete floor finishing products that may be incorporated into the Work include, but are not limited to, the following: 1. Bomanite Corp. 2. Increte Systems Inc. 3. L&M Construction Chemicals, Inc. 4. L. M. Scofield Company. 5. Perfect Polish. 6. QC Construction Products. 7. W.R. Meadows Inc. 2.2 MATERIALS A. General: Provide materials in conformance with Source limitations article. B. Penetrating Liquid Floor Treatment (Densifier and Stain Resistance): Clear, chemically reactive, waterborne solution of inorganic silicate materials and proprietary components; odorless; colorless; that penetrates and densifies concrete surfaces and provides additional stain resistance. Provide breathable treatment which permits moisture transmission through concrete. 1. Available Products: Subject to compliance with requirements, available products that may be incorporated into the Work include, but are not limited to, the following: POLISHED CONCRETE FLOOR FINISHING

4 a. Bomanite Corporation; Stabilizer Pro. b. L&M Construction Chemicals, Inc.; FSG Hardener Plus. c. L. M. Scofield Co.; Formula One Lithium Densifier. d. W.R. Meadows Inc.; LIQUI-HARD. C. Patching Materials: Manufacturer s recommended facing mix to facilitate grinding and polishing. Trowel or spray applied mortar based on Type II Portland cement blend modified with bonding agent designed to bond to prepared concrete and cure rapidly in order to aid grinding production. D. Joint Fillers: Multi-component Pourable Urethane Sealant for traffic exposure, designed to fill and support the sawed joints in a concrete slab while being compatible with the concrete slab grinding and polishing processes. 1. Available Products: Subject to compliance with requirements, available products that may be incorporated into the Work include, but are not limited to, the following: a. Euco; QWIKjoint. b. Hi-Tech Structural Systems; Polyurea Joint Filler HT-PE85 c. L&M Construction Chemicals, Inc.; Joint Tite 750. E. Related Materials: 1. Water: Potable. 2.3 CONCRETE MIXTURES A. Concrete Slab-on-Grade materials and mixture properties are specified in Division 3 Section Cast-in-Place Concrete. 1. Compressive Strength (28 Days): As specified. 2. Slump Limit: As specified. 3. Curing requirements as specified. 2.4 CONTROL JOINTS A. Provide saw-cut weakened-plane joints in conformance with Division 3 Section Cast-in-Place Concrete. PART 3 - EXECUTION 3.1 COORDINATION A. Coordinate substrate work of Division 3 Section Cast-in-Place Concrete for polished concrete slab finishes, including aggregates, admixtures, and requirements in order to obtain specified finish. POLISHED CONCRETE FLOOR FINISHING

5 3.2 EXAMINATION UNIVERSITY SERVICES ANNEX A. Examine substrate, with installer present, for conditions affecting performance of finish. Rectify conditions detrimental to timely and proper work. Do not proceed until unsatisfactory conditions are corrected. 1. Examine exposed subgrades and sub-base surfaces for compliance with requirements for dimensional, grading, and elevation tolerances. 2. Verify that floor surfaces are free of construction damage and contaminants. B. Verify that base slab meets finish and surface profile requirements in Division 3 Section Cast- In-Place Concrete, and Project Conditions above. C. Confirm concrete has attained adequate strength to begin polishing without experiencing fine aggregate loss from the initial grinding process or as directed by floor finish system manufacturer before application can begin. D. Repair of defective concrete due to improper installation is the Polished Concrete Contractor s responsibility. Removal and replacement of concrete that cannot be repaired and patched to Architect s approval is the Concrete Contractor s responsibility. The determination of whether the concrete can be repaired or must be removed and replaced is the General Contractor s to make with the knowledge that adequate cure time of replaced sections must be allowed prior to commencing the polishing process. E. Do not use stain removing agents unless approved in writing by the manufacturer. 3.3 CONCRETE PROTECTION AND CURING A. Specified in Division 3 Section Cast-in-Place Concrete. 3.4 APPLICATION A. Protect adjacent surfaces. B. Prepare surfaces according to manufacturer's written instructions and as follows: 1. Clean concrete thoroughly by scraping, applying solvents or stripping agents, sweeping and pressure washing, or scrubbing with a rotary floor machine and detergents recommended by manufacturer. Rinse until water is clear and allow surface to dry. a. Do not use acidic solutions to clean surfaces. 2. Fill control joints with traffic exposure joint filler and shave prior to the grinding and polishing process, or as required by floor finish system manufacturer. C. Provide polished concrete floor slab finishing, including specialty hardening and polishing process according to manufacturer's written instructions, to ensure a consistent appearance from wall to wall, and as follows: 1. Exposure of Aggregate: Grind concrete to the following exposure: a. Class B: Fine Aggregate (Salt and Pepper) Finish, exposing only the fine aggregate such as sand and small aggregate with the concrete. 2. Polish: Polished to the following level of finish per IPCI and in compliance with manufacturer system guidelines for number of grinding and polishing steps and grits: a. Level 3: High Sheen, 800 grit. POLISHED CONCRETE FLOOR FINISHING

6 3. Clean floor thoroughly after each polishing/grinding step. 4. Apply penetrating concrete floor treatment (sealer/hardener) in accordance with manufacturer s instructions. 5. Polish to pre-determined level based on test sample. 6. Polish to within 1/2-inch of vertical surfaces. D. Properly dispose of collected dry dust from polishing. 3.5 FIELD QUALITY CONTROL A. Engage a qualified walkway auditor to perform field testing to determine if polished concrete floor finish complies with specified static and dynamic coefficients of friction. 3.6 REPAIRS AND PROTECTION A. Remove and replace polished floor finishing that is broken or damaged or does not comply with requirements in this Section. Remove work in complete sections from joint to joint unless otherwise approved by Architect. B. Protect polished floor finishing from damage. Exclude traffic from polished concrete floors for at least 14 days after placement. Cover with breathable product, such as Kraft paper or thin curing blanket. Do not cover with Masonite, plywood, or polyethylene. C. Repair damages to adjacent surfaces caused by cleaning operations. D. Maintain polished floor finishing free of stains, discoloration, dirt, and other foreign material. E. Sweep polished concrete floors not more than two days before date scheduled for Substantial Completion inspections. 3.7 CLOSEOUT A. Engage CPAA Craftsman to train Owner's designated personnel in proper procedures for maintaining polished concrete floor END OF SECTION POLISHED CONCRETE FLOOR FINISHING