Attachment 153 Amend4_DLA_OPS_PH II_Spec_03 36 00.pdf

DLA OPS CENTER PHASE 2 W91236-17-D-002

DEFENSE SUPPLY CENTER RICHMOND (DSCR), RICHMOND, VA

SECTION 03 36 00

ARCHITECTURAL POLISHED FLOOR SLABS (CONCRETE)

07/14

PART 1 GENERAL

1.1 REFERENCES

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

ASTM INTERNATIONAL (ASTM)

ASTM E96/E96M (2013) Standard Test Methods for Water Vapor Transmission of Materials

AMERICAN CONCRETE INSTITUTE INTERNATIONAL (ACI)

ACI 302.1R (2004; Errata 2006; Errata 2007) Guide for Concrete Floor and Slab Construction

1.2 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only or as otherwise designated. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. The following shall be submitted in accordance with Section

01 33 00.00 50 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

All procedures and products shall be approved prior to the preinstallation meeting.

Preinstallation Meeting

SD-03 Product Data

Cleaning Chemicals

Penetrating Sealer

Penetrating Hardener

Dye

Alcohol Based Stain Sealer

Joint Sealants

SD-04 Samples

Color Samples and Charts

SECTION 03 36 00 Page 1

SD-08 Manufacturer's Instructions

Special Procedures for Polished Concrete

Maintenance Instructions

1.3 ADMINISTRATIVE REQUIREMENTS

1.3.1 Polished Concrete Floor Finish

Provide polished concrete floor finish in Metrology Lab A-150, Mylar Room A-151, and Recycle Room D-182.

1.3.2 Preinstallation Meeting

Convene a preinstallation meeting at least one week prior to beginning installation of slabs to review conditions of preparation, storage and handling, installation procedures, sequencing, protection and coordination with other related work. Attendance by the project superintendent, installer, installer's crew leader, and representatives of the trades affected by this work is required. Notify the Contracting Officer at least 10 calendar days before meeting.

1.4 DELIVERY, STORAGE, AND HANDLING

a. Deliver materials to Project Site in original, factory sealed, unopened, new containers bearing manufacturer's name and label intact and legible, with the following information:

(1) Name or title of material.

(2) MSDS Sheets.

(3) Application instructions.

(4) Maintain record of container drum numbers.

b. Store materials in protected and well ventilated area at temperatures between 40° and 90° degrees F., unless otherwise required by manufacturer.

(1) Keep containers sealed until ready for use.

(2) Do not use materials beyond manufacturer's shelf life limits.

(3) Protect materials during handling and application to prevent damage or contamination.

PART 2 PRODUCTS

2.1 PENETRATING SEALER/DENSIFIER

Clear liquid form of silicate to permanently dustproof and harden concrete surfaces and provide abrasion resistance by penetrating into concrete pores and chemically reacting. Chemically relies on an internal reaction, leaving no surface film or residue to densify pores.

SECTION 03 36 00 Page 2

2.1.1 Penetrating Hardener / Densifier

Penetrating hardener / densifier shall be Euco Diamond Hard by Euclid Chemical Company, Cleveland, OH or Armor Densifier by Concrete Polishing Technologies, Inc, Norris, TN.

2.2 SEALER

2.2.1 Alcohol Based Stain Sealer

Alcohol based stain sealer shall be Stain Shield by Concrete Polishing Solutions or other approved product.

PART 3 EXECUTION

3.1 SPECIAL PROCEDURES FOR POLISHED CONCRETE

3.1.1 Coordination

a. Methods of concrete strike off and troweling to achieve satisfactory surface profile and condition prior to diamond polishing. See section 03 30 00.00 10.

b. Clean concrete surfaces prior to performing polishing. Remove all surface laitance curing compounds via power scrubbing, power washing, etc.

c. Vapor barrier for polished concrete slabs shall be 15 mil polyethylene having a vapor permeance rating of 0.05 perms or less as determined in accordance with ASTM E96/E96M.

3.1.2 Equipment

a. Polishing shall be dry diamond method only, utilizing direct connect HEPA filtration system, metal bonded diamond / resin bonded diamond multi orbital planetary action opposing rotational diamond headed machines produced in Sweden or the Netherlands, or other equipment acceptable to the Owner's Representative.

b. Initial polishing shall be completed prior to the installation of machinery and other non-structural obstacles.

3.1.3 Special Concrete Place and Finish Procedures

a. Machine and hand troweling shall be from edge of pour to edge of pour. Hand float all edges. Where plumbing or electrical stub-ups and penetrations occur, concrete adjacent to same shall be troweled flat and level with the surrounding concrete.

b. Surfaces to receive diamond polishing shall receive a smooth, flat and level surface. Initial strike-off and surface re-correction should be capable of achieving specified concrete tolerances per Section 03 30 00 and no more than 1/8 inch deviation from level within 10 feet - 0 inches.

(1) Consult ACI 302.1R Tables 8.1 and 8.2 for recommendations to achieve various flatness and levelness values.

c. Minimum troweling or panning shall be performed. See Section 03 30 00.

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(1) DO NOT BURNISH FLOOR SLAB.

3.1.3.1 Defects

a. Areas of the floor slab that have finishing or post finishing imperfections such as pits, valleys, low spots, gouges, concrete spatter, or slobbers that result in elevation profile changes greater than 0.050 inches when measured under with a 12 inch straightedge will require an additional grinding procedure.

b. The associated cost of this grinding shall be the responsibility of the Contractor.

c. The following will not be acceptable:

(1) Concrete remnants from previous placements.

(2) Foreign and deleterious substances from unclean tools, equipment or miscellaneous objects dropped into concrete/terrazzo while it is being placed.

(3) Localized imprints from boots, foreign objects dropped into concrete or damage to slab sustained during and after curing.

3.2 SURFACE PREPARATION

3.2.1 Cleaning Equipment

3.2.1.1 Floor Scrubbers

Walk behind scrubber with squeegee and soft brush.

3.2.1.2 Brushes

Use one of the following as appropriate:

a. Nylon softens when wet, so it is used for gentle scrubbing, mopping or polishing of decorative floors. Will not scratch tile, terrazzo, or coated surfaces.

b. Bassine Natural fiber which is a traditional material used for gentle scrubbing of tile, terrazzo or marble.

c. Union Mix Combination of Bassine and another natural fiber called Tampico. Most gentle brush fill for light scrubbing or buffing of decorative floors.

3.2.1.3 Cleaning Chemicals

a. Trisodium Phosphate.

b. Tennant Super Soilage Degreaser.

c. Other approved degreaser.

3.2.2 Pre-Polishing Cleaning

a. Remove curing, sealing and coating agents, oil, breaking compound

SECTION 03 36 00 Page 4 residue, wax and grease by scraping off heavy deposits mechanically or chemically to assure penetration of product into surface.

b. Remove mildew by scrubbing with solution of trisodium phosphate and bleach. Rinse with clean water.

c. Remove dust and loose material by brushing, sweeping, vacuuming, and blowing with high pressure air.

d. Remove paint residue with solvent/stripper provided the stripper does not have an acidic pH.

e. Power rinse entire floor surface to thoroughly rinse and remove all soap residue or contaminants. Squeegee dry.

3.3 FLOOR SURFACE POLISHING

Polishing Contractor is to perform the following services and apply the following products:

a. Diamond grinding in accordance with the specifications listed below.

(1) 80 grit metal bond diamond to initially smooth and open up concrete to accept hardener.

(2) Install architectural saw cut pattern as per Architectural drawings for concrete floors.

(3) Use Soff Cut ProEdge Beveled Blades or other architectural reveal as required by Architect.

(4) Application of chemical hardener / densifier to eliminate dusting.

(5) 150 grit metal bond diamond to eliminate excess hardener from the surface.

(6) 100 grit resin metal bond diamond to eliminate metal bond scratches.

(7) Application of Concrete Dye for initial coloring of concrete floors.

(8) Architectural reveals define boundaries of Concrete Dye.

(9) Owner to approve color of dye during mock-up phase.

(10) 400 grit resin bonded diamond - to prepare floor for polishing.

(11) Reapplication of Concrete Dye for concrete floors as required to provide optimal coloring.

(12) 800 grit resin bonded diamond to finish surface. Provide 800 grit resin bonded diamond finish prior to CMU walls being laid above finish floor elevation. Upon completion of the 800 grit, provide a sealer that will be compatible to the 800 and 1500 grit resin bonded diamond finish that will occur within two months of substantial completion.

(13) Provide an 800 grit resin bonded diamond finish and a 1500 grit

SECTION 03 36 00 Page 5 resin bonded diamond finish within two months of Substantial Completion.

c. Application of penetrating sealer to resist stains.

3.4 CLEANING AND PROTECTION

a. Polished concrete 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.

b. Cover polished surfaces with craft paper, color-fast polypropylene carpet flipped up-side-down or floor protection products such as EZ-Cover and EZ-Cover Max from McTech.

c. To protect areas subjected to masonry wall construction, overhead sprinkler, plumbing and other overhead work that might subject the slab to dropped materials or tools, place 1/4 inch hardboard or 1/2 inch thick plywood over carpet cushion, EZ-Cover of EZ-Cover Max floor protection. Remove 1/4 inch hardboard or 1/2 inch plywood immediately following overhead work to permit concrete drying. No pipe cutting or other work involving cutting oils shall be permitted on architectural slab surface.

d. Concrete floor gouges and spalls shall be repaired as follows:

(1) The repair area shall be carefully squared up. Slightly oversize and re-define the perimeter of the repair with a small dust free concrete saw to a depth of 3/4 inch. Carefully remove the area of concrete within the limits of the saw cut boundary to a depth not less than 3/4 inch using a small impact hammer, chisel or other acceptable percussion instrument. Provide International Concrete Repair Institute (ICRI) Concrete Surface Profile (CSP) of at least

5. Use a wire brush, wire wheel on a drill, compressed air or vacuum to remove all surface laitenance and other materials that might affect bond. Use painters tape or other appropriate slab protection material adjacent to the repair boundary to protect the architectural surface from staining. Apply bonding compound such as Degussa Concresive Liquid LPL Long Pot Life Bonding Adhesive or Euclid 452 High Modulus Epoxy to the roughened concrete surface and vertical faces of the repair area. Secure small samples of cement, sand, aggregate and liquid color (if required) from ready mix supplier. Blend coarse and fine aggregates in proportions utilized by ready mix supplier, then screen 1/2 inch and larger particles from the blend of sand and coarse aggregate. Combine appropriate proportion of cement to remaining sand and aggregate.

Incorporate appropriate dosage of water to sample to create a workable paste. Incorporate liquid color (if required) and mix thoroughly. Repair materials should be overfilled, tamped and troweled leaving a slight elevated profile at the surface. The area should be kept wet for a minimum of three days and covered with a cure cover. After a minimum of 72-HRS, the grind and polish to match surrounding area.

e. Special emphasis shall be on ingress, egress and main foot traffic/working areas.

f. When removed for cleaning, place carpet pad after floor has dried.

SECTION 03 36 00 Page 6

g. Spills shall be cleaned up immediately.

h. Splatters of mortar, paint or similar construction materials shall be immediately cleaned-up.

i. Spilled liquids shall be immediately cleaned-up. 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 water in the scrubber shall be continuously changed. Dirty water from scrubber left on polished surfaces will etch finished surface.

3.5 JOINT SEALANTS

Joint sealants shall be a 2-part polyurethane traffic grade. Protect concrete surfaces adjacent to joints and tool flat. See section 07900 for sealants.

3.5 MAINTENANCE INSTRUCTIONS

Provide detailed maintenance instructions for floor care.

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SECTION 03 36 00 Page 8

1.4 DELIVERY, STORAGE, AND HANDLING

3.2.2 Pre-Polishing Cleaning