Concrete Floor Polishing ME- Building Group

SECTION 09621 - CONCRETE FLOOR POLISHING

PART 1 - GENERAL

0.1 RELATED DOCUMENTS 1. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section.

0.2 SUMMARY

A. This Section specifies industrial concrete floor polishing.

B. Related Work Specified In Other Sections: 1. Division 3 Section "Cast-In-Place Concrete" for basic concrete work. 2. Division 3 Section "Industrial Concrete Floor Slabs” for placement of concrete to be polished. 3. Division 3 Section "Architectural Concrete Floor” for placement of concrete to be polished.

0.3 POLISHED CONCRETE PERFORMANCE REQUIREMENTS

A. Definition: Concrete polishing is a process of grinding the concrete surface and application of a sealer/hardener/densifier that will result in a concrete floor finish that will not dust, is resistant to penetration from oils and is aesthetically pleasing. 1. Process may be either a proprietary system from specialty contractor or use of specified products with acceptable grinding methods. 2. Acceptable Grinding Methods: Equipment and techniques that produce documented results of concrete finishes.

B. Finish Sheen: Visual expectation being at a distance of 30 to 50 feet the floor shall clearly reflect side and overhead lighting. No aggregate exposure or excessive removal of light reflective mineral dry-shake. Such as by a 400 dry grit grind/polish. 1. Polishing shall be dry diamond method, not wet, utilizing direct connect HEPA filtration system, metal bonded diamond /resin bonded diamond multi orbital planetary action opposing rotational diamond headed machines acceptable to the Owner’s Representative.

C. Coordination: Concrete polisher shall coordinate the following: 1. Concrete placement, floating, toweling and curing shall be coordinated with the polisher so surface is acceptable for polishing. 2. Scheduling of joint sealant installation is not detrimental to the polishing process. 3. Cleaning of concrete surface prior to performing polishing.

D. Slip Resistance: Static coefficient of friction shall be 0.6 for level floors and 0.8 for ramped surfaces as defined by the ADA Accessibility Guidelines (ADAAG). 1. Testing shall be in accordance with ASTM C 1028 or use of similar devices recognized by ADAAG. Page 1 of 4 Revision Date: Oct. 2010 Project & Bid Package File name:0031028d546101d83e11af1b4b8e8bc8.doc

0.4 SUBMITTALS

A. Manufacturer's product data, performance criteria and other documentation for each material specified in this Section that is proposed for use, including: 1. Liquid curing/sealing compound: If products have not been reviewed and accepted by Chrysler Health or Environmental groups, include MSDS information as a separate submittal directed to the Owner for review.

B. Test Area: Perform polishing process on a 10 ft. by 10 ft. space within the area to be polished. Demonstrate process and confirm final polishing grit required to achieve specified results.

0.5 QUALITY ASSURANCE

A. Diamond Grinding and Polishing: Densifiers and penetrating stain blockers shall be applied during the grinding and polishing process by the Polisher only following the system defined and accepted by the Owner.

B. Pre-polishing Conference: Prior to start of work, attend the Pre-installation Conference specified in Division 3 Section “Concrete Floor Slabs.”

1. Meet with representatives of the Owner, Architect/Engineer, testing and inspecting Agency, and others whose work interfaces with, or directly affects concrete polishing. 2. Review methods and procedures related to work of this Section. 3. Discuss plans to execute the work, scheduling, equipment, assignments, and storage procedures. 4. Document proceedings, including corrective measures or actions required, and furnish a copy of record to each participant.

C. Concrete Polisher Qualifications: An installer who has documented experience and proven techniques and/or processes of concrete polishing. When a system is used, installer shall be certified or licensed by the system manufacturer.

1. Only the following are acceptable; others will not be considered. a. Titan Industrial Flooring: Contact Steve Buchanan 248.433.8178 b. Hoover Wells Contact Dan Simon 419.466.3521 c. Convergent Concrete Technologies Contact Arn Ottme 979.277.4534 d. Concrete Polishing Technologies Inc. Contact Dan Grady 865.803.5041 e. Concrete Arts: Contact Tom Graf 612.369.1074

2. Submit the following to the Owner’s Representative for review and confirmation prior to contract award: a. Certificate of training from an Owner acceptable source. b. List of Projects completed including: 1) Company name, address, phone number, specific description of work as preformed, existing conditions of concrete polished, old or new, total sq ft polished, photos of finished surface from a distance and close up, to show aggregate exposure. c. Must prove 3 years minimum experience with 7 to 10 day wet cured concrete dry polishing system. Page 2 of 4 Revision Date: Oct. 2010 Project & Bid Package File name:0031028d546101d83e11af1b4b8e8bc8.doc

d. Must have successfully completed at minimum 100,000 sq. ft. of 7 to 10 day wet cured exposed aggregate dry polished concrete work completed to date. e. Must provide total number of grinding and polishing machines w/ manpower available to dry polish and clean polished areas in this project.

PART 2 - PRODUCTS

0.1 MATERIALS

A. Products recommended by the Polishing Trade that have been successful in producing desired shine and impervious to penetration by liquids.

PART 3 - EXECUTION

0.1 CONCRETE POLISHING

A. Be responsible for protecting polished concrete from stains or physical damage during construction that occurs between polishing phases. Grinding and polishing shall begin not before 30 days after placement; when concrete has attained sufficient strength so not to displace aggregate or fiber reinforcing. a. Examination: Polishing Trade and Contractor with Owner’s Representatives and Architect/Engineer shall inspect the areas to be polished. 1) Verify flatness and levelness, and inspect for voids, holes, gouges or other imperfections that would be detrimental to achieving a polished finish. Polishing Trade shall not proceed until detrimental conditions have been corrected by the Contractor. 2) Polishing Trade shall evaluate slab surface to confirm appropriate grinding grit that must be initially used.

b. Grinding/Polishing: Process is intended to begin with grinding using not less than a 30 grit metal bonded type pad and ending with polishing with a 500 grit resin bond pad. 1) Grits specified are for purposes of establishing boundaries. Should lower grits be required for grinding due to conditions of the slab, this shall be performed at no additional cost to the Owner. 2) Include appropriate sealer/densifier application with final grinding/polishing

c. Polishing: Process is intended to begin with polishing using 100 grit resin bond pad and ending with an 8000 grit resin bond pad or similar to achieve specified gloss; 60 reading on a gloss meter.

0.2 CLEANING AND PROTECTION

A. Because polished floors are the finish that will be exposed at the completion of construction, these surfaces shall be protected and cleaned between polishing phases while subsequent construction occurs and after completion of polishing until acceptance by the Owner. Page 3 of 4 Revision Date: Oct. 2010 Project & Bid Package File name:0031028d546101d83e11af1b4b8e8bc8.doc

1. Protection: Cover polished surfaces with permanently dyed breathable fiber such as hair, jute, nylon, polyester, or polypropylene type carpet cushion having a heavy density acceptable to the Owner. a. Protective covering shall be over the entire polished floor. Workers, tools or materials shall not be on unprotected floors. b. Special emphasis shall be on ingress, egress and main foot traffic/working areas. c. When removed for cleaning, place carpet pad after floor has dried. d. In areas where masonry or similar work that occurs, materials or tools be dropped, include 1/2 inch thick plywood over carpet cushion. 2. Spills shall be cleaned up immediately. a. Provide protection from rain or other moisture that may migrate or pass through uncompleted construction such as roof openings or exterior wall penetrations. b. Splatters of mortar, paint or similar construction materials shall be immediately cleaned-up. c. Spilled liquids shall be immediately cleaned-up. 3. Cleaning: a. Cleaning: Clean at least once every evening after Work in the area of polished floors are done for the workday. 1) No chemicals, detergents or other products may be added to machine; only potable water is to be used. 2) Water in the scrubber shall be continuously changed. Dirty water from scrubber shall not be left on polished surfaces.

END OF SECTION

of 4 Revision Date: Oct. 2010 Project & Bid Package File name:0031028d546101d83e11af1b4b8e8bc8.doc