Addendum_No2-033543_Polished_Concrete_Finishing.pdf

Renovation & Restoration – Building 1467 – Fort Knox, KY April 18, 2016 Issued for Construction – Addendum No. 2 54581

SECTION 03 35 43 Page 1

SECTION 03 35 43 – POLISHED CONCRETE FINISHING

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes: Application of pigment, densifier, stain protector and polishing of concrete floor slabs.

B. Related Requirements:

1. Section 03 53 00 – Miscellaneous Cast-In-Place Concrete

1.2 REFERENCES

A. The publications listed below form a part of this specification to the extent referenced. Publications are referenced within the text by the basic designation only.

B. ASTM International (ASTM):

1. ASTM C1028 - Standard Test Method for Determining the Static Coefficient of Friction (SCOF) of

Ceramic Tile and Other Like Surfaces by the Horizontal Dynamometer Pull-Meter Method.

1.3 SUBMITTALS

A. Government approval is required for submittals with a "G" designation; submittals not having a "G" designation are for Contractor Quality Control approval. Submit the following in accordance with Section 01 33 00

SUBMITTAL PROCEDURES:

B. Product Data: G

1. Densifier: Brand name, chemical composition, installation directions and certificates of compliance with required standards. Submit 30 days prior to first concrete placement.

2. Stain Protector: Brand name, chemical composition, installation directions and certificates of compliance with required standards. Submit 30 days prior to first concrete placement.

C. Applicator Qualifications: G

1. Provide documentation showing densifier and stain protector applicator is certified by the densifier and stain protector manufacturer.

2. Provide list of a minimum of 5 projects performed within the last 3 years of similar type, size and complexity as this contract.

3. Submit 30 days prior to first concrete placement.

D. Provide name of technically qualified densifier and stain protector manufacturer’s field representative.

E. Maintenance Data: G

1. Include instructions for maintenance of installed work, including methods and frequency recommended for maintaining optimum conditions under anticipated use.

2. Include precautions against cleaning products and methods which may be detrimental to finish and performance.

1.4 QUALITY ASSURANCE

A. Coordination: Coordinate densifier and stain protector for concrete work with work of other sections.

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B. Preinstallation Meetings: Conduct preinstallation meeting to verify project requirements, manufacturer's installation instructions and manufacturer's warranty requirements as applicable..

C. Sequence with Other Work: Coordinate application of densifier and stain protector with concrete installer.

D. Field Mock-up: Before performing work of this Section, provide 10 feet by 10 feet field mock-up to verify selections made under submittals. Mock-up conditions to match proposed scope of work. Approval does not constitute approval of deviations from Contract Documents, unless such deviations are approved by Architect in writing.

E. A technically qualified manufacturer’s field representative of the densifier and stain protector product shall be on site during the initial application of the densifier and stain protector, and occasional observations during remainder of the applications.

F. The densifier and stain protector representative shall ensure that the correct amount of densifier and stain protector is onsite and in numbered containers prior to commencement of work.

1.5 PRODUCT DELIVERY, STORAGE AND HANDLING

A. Dispense densifier and stain protector material from factory-sealed containers.

1.6 FIELD CONDITIONS

A. Damage and Stain Prevention:

1. Prohibit and/or protect surface from any operations, chemicals and/or any other activities over concrete that could damage surface.

B. Environmental Limitations:

1. Comply with manufacturer’s written instructions for substrate temperature, ambient temperature, moisture, ventilation, and any other requirement.

1.7 ENVIRONMENTAL REQUIREMENTS

A. Limit and control damage from moisture. Remove standing moisture from floor after densifier and stain protector application.

1.8 WARRANTY

A. Provide manufacturer’s standard warranty for replacement of defective densifier and stain protector products.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Subject to compliance with project requirements, provide products as manufactured by the following to the extent as specified hereinafter for the specific product:

1. Ameripolish, Inc. (800) 592-9320 www.customerservice@ameripolish.com/

2. Approved Equal.

2.2 MATERIALS

A. Ameripolish Dye Classic: Solvent soluble dye.

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B. Or Approved Equal.

C. Color: As indicated on the drawings.

2.3 DENSIFIER AND STAIN PROTECTOR PRODUCTS

A. Pre-Densifier Floor Cleaner: As recommended by densifier manufacturer.

B. Densifier: Concrete chemical densifier specifically for concrete surface treatment which reacts chemically to the concrete surface forming a clear, dense, durable, hard, abrasion-resistant surface. Product shall be a solution that is less than 10 g/l VOC.

1. Ameripolish 3D HS Densifier

2. Ameripolish SR2

3. Or Approved Equal

C. Sprayer: Manufacturer approved high volume, low pressure sprayer and sprayer tip.

D. Accessory materials:

1. Oil Remediation System:

a. Ameripolish Oil Remediation System

b. Or Approved Equal

2. pH Compatible Detergent:

a. Ameripolish Rejuvenating Cleaner

b. Or Approved Equal

2.4 EQUIPMENT

A. Scrubber Machines Equipment used for cleaning operations shall have a head pressure of 150 lbs. or as required to produce the specified results.

B. Field Grinding and Polishing Equipment: A multiple head, counter rotating, walk-behind or ride-on machine, of various size and weights, with diamond tooling affixed to the head for the purpose of grinding concrete. Excludes janitorial maintenance equipment.

1. Use equipment capable of removing generated dust for dry grinding, honing or polishing.

2. Use equipment capable of slurry extraction and containment for wet grinding, honing or polishing.

2.5 ACCESSORIES

A. Repair material: A product that is designed to repair cracks, spalling and surface imperfections. The specified bonding materials shall have sufficient bonding to adhere after polishing process and to have abrasion resistance equal to or greater that adjacent substrate. Material shall have ability to receive dye and shall be tinted to match adjacent surface prior to application. Repair material for all patches shall include an aggregate of similar size to existing adjacent concrete. Contractor shall be responsible for field verification of matching aggregate type.

1. Ameripolish Polishable Mortar

2. Or Approved Equal

B. Grout Material: A thin mortar used for filling voids, pinholes and small surface cracks. The specified bonding materials shall have sufficient bonding to adhere after polishing process and to have abrasion resistance equal to or greater that adjacent substrate. Material shall have ability to receive dye and shall be tinted to match adjacent surface prior to application. Grout material shall be compatible with adjacent concrete for receiving colorant.

Contractor shall field verify and confirm compatible match.

SECTION 03 35 43 Page 4

1. Ameripolish Polish Grout

2. Or Approved Equal

PART 3 - EXECUTION

3.1 GENERAL CLEANING AND POLISHING REQUIREMENTS

A. Coordinate with joint filling operations. Do not perform wet cleaning within 72 hours prior to joint filling or per joint filler manufacturer’s recommendations.

B. Do not use stain or scuff removing agents on finished floor surface.

C. Clean floors as specified hereinafter prior to polishing application.

D. Polish floors as specified hereinafter prior to application of densifier and stain protector.

E. Final finish sheen shall be equivalent to that as accepted on the Floor Test Slab [as specified in Section XX XX XX] and as specified hereinafter.

3.2 CLEANING

A. Use non-oil based sweeping compound to control airborne dust.

B. Treat oil spots with oil remediation system.

C. Scrub floor with scrubber machine and appropriate brushes or pads and pH compatible detergent.

3.3 VAPOR TESTING CONCRETE FLOORS

A. Alkalinity:

1. Test Method: Measure PH according to method indicated in ASTM F 710.

2. Acceptable results: 8 to 13.

B. Moisture Vapor Transmission Rate:

1. Test Method: Perform anhydrous calcium chloride test according to ASTM F 1869.

2. Acceptable results: Not more than 5 pounds per 1000 square feet in 24 hours.

C. Relative humidity:

1. Test method: Perform relative humidity test using in-situ probes according to ASTM F 2170.

2. Acceptable results: Not more than 75 percent.

3.4 POLISHING APPLICATION

A. Commencement of work constitutes an acceptance of existing conditions be the contractor.

B. The following procedures are suggested steps to accomplish the specified finish. Application procedure may vary due to unique project conditions including – but not limited to - hardness of concrete. Procedures used to accomplish approved mock-up shall prevail. Conformance or deviation from the following steps does not remove contractor from providing the specified finish.

C. Initial Grinding:

1. Grind surface equivalent to a finish using grinding equipment making parallel overlapping passes in one direction with sequential perpendicular passes up to and equal to 100 grit metal bonded tooling finish.

Finish to obtain maximum refinement for each increase in grit. Ensure cream layer and all other

SECTION 03 35 43 Page 5 contaminants are removed from floor surface prior to applying densifier, colorants as specified, or stain protectors.

D. Surface imperfections: Provide repair material capable of matching final finish of adjacent surface.

1. Fill surface imperfections including, but not limited to: holes, surface damage, micro cracks, air holes, pop-outs, voids, and micro-pitting in finished work.

2. Surface imperfections shall not be reasonably noticed from a distance standing 10 feet away or greater utilizing lighting conditions present after construction.

E. Apply colored solvent soluble dye to horizontal surfaces using pump sprayer with conical tip to achieve aesthetic and performance that meets project requirements.

F. Apply second coat of colored solvent soluble dye using same methodology as original coat.

G. Allow colored solvent soluble dye to dry for at least one hour or until dye is dry before applying a second coat.

H. Allow colored solvent soluble dye second coat to dry for 1 hour minimum or until dry prior to removing residue.

I. Residue Removal:

J. Autoscrub residue from substrate while wet.

K. Perform second rinse with clean water. Rinse again if water remains discolored.

L. Liquid Densifier Application:

1. Apply densifier and allow to cure as specified.

M. Honing:

1. Hone surface equivalent to a finish using grinding equipment making parallel overlapping passes in one direction with sequential perpendicular passes up to and equal to 400 grit resin bonded tooling finish.

Finish to obtain maximum refinement for each increase in grit.

N. Polishing:

1. Polish surface equivalent to a finish using polishing equipment making parallel overlapping passes in one direction with sequential perpendicular passes up to and equal to minimum [800, 1,500] grit metal bonded tooling finish. Finish to obtain maximum refinement for each increase in grit. Final finish to reach Finished Gloss Level specified hereinafter.

O. Finished Gloss Level:

1. Finished Gloss Level 2 – Medium Gloss:

a. Reflective Clarity Reading: Not less than 55 per ASTM D5767 prior to stain protector application.

b. Reflective Sheen Rating: Not less than 25 per ASTM D523 prior to stain protector application.

P. Final Aggregate Exposure:

1. CPAA Class B – Fine aggregate (Salt and Pepper)

a. Fine aggregate exposure with little or no medium aggregate exposure at random locations.

b. Aggregate size up to 1/8” diameter.

Q. Provide specified final gloss prior to Owner Possession.

3.5 DENSIFIER APPLICATION

R. Area to be treated: Apply densifier to all interior concrete floors designated to receive polished finish.

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S. Examination and Preparation:

1. Examine surfaces receiving densifier. Verify that surfaces conform to product manufacturer's requirements for substrate conditions.

2. Vacuum and clean saw cut joints and surrounding area so that no dust remains to react with concrete finish material.

3. Remove remnant of any temporary film forming curing compound prior to application of densifier.

Remove compound by cleaning and scrubbing in accordance with manufacturer’s instructions.

4. Prior to application, scrub floor to remove latent salts. Do not proceed until unsatisfactory conditions have been corrected.

5. Beginning of application indicates acceptance of existing conditions.

T. Application:

1. Application shall be performed by certified applicator in accordance with manufacturers published instructions.

2. Schedule to begin 28 days after floor slab placement.

3. Employ methods to ensure concrete surface is not damaged during application, including discoloration.

4. Apply densifier finish at the rate recommended by manufacturer.

5. Apply with low pressure sprayer with conical tip with enough coverage to keep concrete surface wet for minimum 20 minute period.

3.5 STAIN PROTECTOR APPLICATION

A. Area to be Treated: Apply stain protector to all interior concrete floors designated to receive polished finish.

B. Examination and Preparation:

1. Examine surfaces receiving stain protector. Verify that surfaces conform to product manufacturer's requirements for substrate conditions.

2. Vacuum and clean saw cut joints and surrounding area so that no dust remains to react with concrete finish material.

3. Remove any foreign materials prior to application of stain protector. Remove compound by cleaning and scrubbing in accordance with manufacturer’s instructions.

4. Prior to application, scrub floor with water to remove latent salts. Do not proceed until unsatisfactory conditions have been corrected.

5. Beginning of application indicates acceptance of existing conditions.

C. Application:

1. Application shall be performed by certified applicator in accordance with manufacturers published instructions.

2. Employ methods to ensure concrete surface is not damaged during application, including discoloration.

3. Apply stain protector finish at the rate recommended by manufacturer.

4. Apply with low pressure sprayer with conical tip and follow with microfiber applicator pad.

5. Apply second coat of stain protector, apply over surfaces to which stain protector has been applied.

6. Apply stain protector finish at twice coverage rate recommended by manufacturer; i.e. manufacturer recommended 2,000 SF – apply at 3,000 SF rate.

7. Apply with low pressure sprayer with conical tip and follow with microfiber applicator pad.

3.6 FINISH REQUIREMENTS

A. Gloss: Final surface gloss shall be a Specified Overall Gloss Value (SOGV) of not less than 50 and a Minimum Local Gloss Value (MLGV) of 40 as measured using a Horiba IG-320 Gloss Checker or equivalent.

B. Slip Resistance: Measured static coefficient of friction (SCOF) shall be not less than 0.50 as measured in accordance with ASTM C 1028, at time of Owner Possession.

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3.7 FLOOR PROTECTION

A. Protect finished floor from construction traffic and weather until time of Owner Possession.

B. Prohibit caustic chemicals and materials, acids and acidic detergents to come in contact with slab.

3.8 PRODUCT DISPOSAL

A. Upon completion of densifier and stain protector application, dispose of excess material as required by local agency having jurisdiction.

B. Certified applicator shall remove densifier and stain protector product containers from job site immediately upon completion of treatment.

3.9 MAINTENANCE PROCEDURES

A. Maintenance Meetings: Conduct meeting prior to maintenance procedures to verify project requirements, manufacturer's maintenance instructions and manufacturer's warranty requirements as applicable. A manufacturer’s representative shall be included in maintenance meetings.

B. Utilize maintenance pads recommended by chemical product manufacturer, Ameripolish Rejuvenating Cleaner, and other related sundries as recommended by chemical products manufacturer, for maintenance of floor surface.

END OF SECTION