STANDARD_SPECIFICATION-EPOXY_TERRAZZO.docx

STANDARD SPECIFICATION - EPOXY TERRAZZO

EPOXY TERRAZZO FLOORING

PART 1 – GENERAL

1.01 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract.

1.02 SUMMARY

A. Section Includes:

1. Thin-set Epoxy Terrazzo Flooring including preparation of substrates.

2. Thin-set precast epoxy terrazzo tread or tread & riser units.

3. Thin-set pre-cast epoxy terrazzo wall base units.

4. Related accessories.

1.03 SUBMITTALS

A. Shop Drawings/Procedures. Include terrazzo installation requirements. Include plans, elevations, sections, component details and attachments to other work (as appropriate). Show layout of the following:

1. Divider strips.

2. Control- and expansion-joint strips.

3. Base and border strips.

4. Abrasive strips.

5. Stair treads, risers and landings.

6. Precast terrazzo joints and edge configurations including anchorage details.

7. Terrazzo patterns.

B. Samples for Selection/Verification: Samples for each type, material, color and pattern of terrazzo and accessory required showing the full range of color, texture and pattern variations expected. Label each terrazzo sample to identify manufacturer’s matrix color and aggregate types, sizes and proportions. Prepare samples of same thickness and from same material to be used for the Work in size indicated below:

1. Epoxy Terrazzo: minimum 6” x 6” (152.4 mm x 152.4 mm) sample of each color and type of terrazzo approved for instalation.

2. Precast Epoxy Terrazzo: minimum 6” x 6” (152.4 mm x 152.4 mm) sample of each color and type of terrazzo.

3. Accessories: 6” length (152.4 mm) of each kind of divider strip, stop strip and control joint strip required.

4. Stair Treads: 12” length (304.8 mm) wide sample combination tread/riser with cast-in nosing.

C. Manufacturer Experience:

1. Furnish a list of at least five (5) epoxy terrazzo projects using material being submitted for this project installed during the last five (5) years of the same scope, complexity and at least 50 percent of the square footage.

D. Qualification Data: For qualified Installer.

1. Furnish a list of at least five (5) epoxy terrazzo projects using material being submitted for this project installed during the last five (5) years of the same scope, complexity and at least 50 percent of the square footage.

E. Material Test Reports: For moisture and/or relative humidity of substrate and compliance with United States Coast Guard Approved Equipment Listing or equivalent as approved by regulatory bodies http://cgmix.uscg.mil/Equipment/Default.aspx.

F. Maintenance Data: Submit 5 copies of manufactures maintenance recommendations and 5 copies of manufacturer’s instructions

1.04 QUALITY ASSURANCE

A. Installer Qualifications: A qualified installer who is acceptable to epoxy terrazzo manufacturer to install manufacturer’s products.

1. Engage a terrazzo contractor with at least five (5) years of satisfactory experience in installation of epoxy terrazzo. Terrazzo contractor shall demonstrate experience during last five (5) years of at least (5) projects of comparable scope and complexity of at least 50 percent of the total square footage of this project B. Source Limitations:

1. Obtain primary Epoxy Terrazzo Flooring System materials including membranes, primers, resins and hardening agents from a single manufacturer with proof of compliance with United States Coast Guard Approved Equipment Listing or equivalent as approved by regulatory bodies http://cgmix.uscg.mil/Equipment/Default.aspx.

2. Obtain aggregates, divider strips, sealers, cleaners from source recommended by primary materials manufacturer.

C. Pre-installation Conference: Conduct conference at Project site to comply with general requirements. Project Meetings. Review methods and procedures related to terrazzo including, but not limited to, the following:

1. Inspect and discuss installation procedures, joint details, jobsite conditions, substrate specification, vapor barrier details and coordination with other trades.

2. Review and finalize construction schedule and verify availability of materials, Installer’s personnel, equipment and facilities needed to make progress and avoid delays.

3. Review special terrazzo designs and patterns.

4. Review dust control procedures.

5. Review plans for concrete curing and site drying to enable timely achievement of suitable slab moisture conditions.

1.05 DELIVERY, STORAGE AND HANDLING

A. Deliver materials to Project site in supplier’s original wrappings and containers, labeled with source’s or manufacturer’s name, material or product brand name and lot number if any.

B. Store materials in their original, undamaged packages and containers, inside a well-ventilated area protected from weather, moisture, soiling, extreme temperatures and humidity.

1. Storage temperatures should be between 60F to 80F.

1.06 PROJECT CONDITIONS

A. Terrazzo contractor shall, prior to surface preparation:

1. Evaluate deck condition, including moisture content and extent of repairs required, if any.

2. Maintain the ambient room and floor temperature at 60F or above for a period extending 72 hours before, during and after floor installation. Concrete based materials to receive epoxy terrazzo shall have cured for at least 28 days and be free of all curing compounds. Test substrate to determine acceptable moisture levels prior to installation.

B. Prior to and during each day of installation, the terrazzo contractor shall verify that the dew point is at least 5F (-15C) less than the deck and air temperature.

C. Acceptable Substrates:

1. Level tolerance: Deck underlayment shall be level with a maximum variation from level of 1/4” in 10 feet. Any irregularity of the surface requiring patching and/or leveling shall be done using and approved underlayment and selected aggregates as recommended by the terrazzo products manufacture.

2. Decks shall be prepared mechanically by shot blasting or by grinding with to achieve the terrazzo products manufactures required profile.

3. Cementitious underlayment products shall be cured sufficient to meet the terrazzo products manufactures required moisture content and hardness. No curing agents are to be used in areas to receive terrazzo and compliance with United States Coast Guard Approved Equipment Listing or equivalent as approved by regulatory bodies, http://cgmix.uscg.mil/Equipment/Default.aspx.

D. Provide permanent lighting or, if permanent lighting is not in place, simulate permanent lighting conditions during terrazzo installation.

E. Provide protection from other trades prior to final acceptance by owner.

PART 2 – PRODUCTS

2.01 EPOXY TERRAZZO

Products: All material, unless otherwise specified herein, shall be of commercial quality; suitable for marine environment; and shall conform to ASTM, Federal, Military, SAE, ABS, and USCG (CFR) requirements. All materials shall be free from imperfections of manufacture and from defects, which adversely affect appearance or serviceability.

A. Generally materials meeting the U.S. Department of Defense Specification MIL-PRF-24613, Type III (Deck Covering Materials, Interior, Cosmetic, Polymeric, Type III) will meet the required regulatory requirements, it is the contractors responsibility to ensure that any materials installed onboard the vessel conform compliance to those requirements.

2.02 STRIP MATERIALS

A. Thin-set Divider Strips: L-type.

1. Material will be selected from manufacturer’s full range available as needed/specified.

2. Guide for commonly used L-type divider strips for Thin-set Epoxy Terrazzo Systems:

1/8” 1/4”

B. Accessory Strips: Match divider strip width, material and color unless otherwise indicated. Use the following types of accessory strips as required to provide a complete installation:

1. Base-bead strips for exposed top of terrazzo base.

2. Edge-bead for exposed edges of terrazzo.

3. Nosings for terrazzo stair treads and landings.

2.03 MISCELLANEAOUS ACCESSORIES

A. Strip Adhesive: 100% solids epoxy resin adhesive.

1. Use adhesive that has a VOC content of 50g/L or less when calculated according to 40 CFR 59, Subpart D (EPA Method 24).

B. Anchoring Devices:

1. Strips: Provide mechanical anchoring devises for strip materials as required for secure attachment to substrate.

2. Precast Terrazzo: Provide mechanical anchoring devices as recommended by Terrazzo Contractor for proper anchorage and support of units for conditions of installation and support.

C. Sealer: Slip- and stain-resistant sealer that is chemically neutral with a pH factor between 7 and 10, a standard coefficient of friction of 0.6 or higher, does not affect physical properties of terrazzo and complies with NTMA’s “Terrazzo Specifications and Design Guide.”

PART 3 – EXECUTION

3.01 EXAMINATION

A. Examine substrates and areas, with Terrazzo Contractor present, for compliance with requirements for installation tolerances and other conditions affecting performance.

B. Proceed with installation only after unsatisfactory conditions, including level tolerances, have been corrected.

3.02 PREPARATION

A. Clean substrates of substances, including oil, grease and curing compounds, that might impair terrazzo bond. Provide clean, dry and neutral substrate for terrazzo application.

B. Substrate:

1. Accomplish an unobstructed flow test of each deck drain, using clean fresh water prior to the disturbance of existing deck covering.

Verify that all deck fittings are free, removable, and operational.

2. Blank or plug drains to prevent entry of contaminants.

3. Accomplish removal of the existing deck covering in its entirety (including base cove where installed) for locations requiring installation of a complete deck covering system.

4. Remove unused remnants, clips, brackets, and weldments from decks and vertical surfaces receiving new deck coverings.Chip and grind surfaces flush and smooth in way of removals.

5. Accomplish a visual inspection of each exposed piping penetration, deck drain, deck plating and bulkheads for structural integrity, deterioration, pitting, cracks, and areas of damage or distortion.

6. Ensure a sound substrate surface free of laitance, glaze, efflorescence, curing compounds, form-release agents, dust, dirt, grease, oil and other contaminants incompatible with terrazzo.

a. Prepare substrate mechanically by shot blasting or by grinding with Wolverine Scarifying Diamonds. Ensure surface preparation meets the requirements of the manufacturer’s installation instructions.

b. Repair or level damaged and deteriorated substrate according to the requirements of the manufacturer’s installation instructions.

7. Verify that substrates are dry and free of moisture.

a. Proceed with installation only after substrates have a maximum relative humidity measurement reading less than 80% or as required by the manufactures instructions.

C. Protect other work from dust generated by grinding operations. Control dust to prevent air pollution and comply with environmental protection regulations.

1. Erect and maintain temporary enclosures and other suitable methods to limit dust migration and to ensure adequate ambient temperatures and ventilation conditions during installation.

3.03 EPOXY TERRAZZO INSTALLATION

A. General:

1. Comply with the Manufactures’ written recommendations for terrazzo and accessory installation.

2. Ensure that matrix components and fluids from grinding operations do not stain terrazzo by reacting with divider and control-joint strips.

3. Delay fine grinding until heavy trade work is complete and construction traffic through area is restricted.

B. Thickness: 1/4” (6.4 mm) minimum to 3/8” (9.5 mm)] maximum

C. Flexible Reinforcing Membrane (if applicable)

D. Primer: Apply to terrazzo substrates according to the product manufactures requirements.

E. Strip Materials(if used):

1. Divider and Accessory Strips:

a. Install strips in adhesive setting bed without voids below strips or mechanically anchor strips as required to attach strips to substrate.

b. Control-Joint Strips: Separate double L-type angles back to back with minimum 1/8” width between. Fill joint and area between strips with semi-flexible Joint Filler. Match material, thickness and color of divider strips and depth required for topping thickness indicated.

c. Construction-Joint (Cold-Joint) Strips: Separate double L-type angles back to back with minimum 1/8” width between. Fill joint and area between strips with semi-flexible Joint Filler. Match material, thickness and color of divider strips and depth required for topping thickness indicated.

d. Expansion-Joint Strips: Separate double L-type angles, positioned back to back with minimum 1/8” width between. Fill area between strips with semi-flexible Joint Filler. Match material, thickness and color of divider strips and depth required for topping thickness indicated.

F. Placing Terrazzo:

1. Mix epoxy matrix with chips and fillers in ratios directed by product manufactures requirements.

2. Trowel apply terrazzo mixture over epoxy primer to provide a dense flat surface to top of divider strips. Allow to cure per product manufactures requirements recommendations before rough grinding.

G. Rough Grinding: Grind with 24 grit silicon carbide or D-36 Diamond matrix stones until all Terrazzo strips and marble chips are uniformly exposed.

H. Grouting:

1. Cleanse floor with clean water and rinse.

2. Remove excess rinse water by wet vacuum, dry and fill voids with product manufactures requirements or Clear Resin.

3. Allow grout or Clear Resin to cure. Grout may be left on terrazzo until other trades work is completed.

I. Polishing: Grind with 120 grit or finer stones until all grout or Clear Resin is removed from surface. Repeat rough grinding, grout coat and polishing if large terrazzo chip voids exist after initial polishing. Produce surface with a minimum of 70 percent aggregate exposure.

3.04 PRECAST TERRAZZO INSTALLATION

A. Install precast units using method recommended by manufacturer unless otherwise indicated.

B. Seal joints between units with joint sealants.

3.05 CLEANING AND PROTECTION

A. Cleaning: Remove grinding dust from installation and wash all surfaces with product manufactures recommended cleaner.

B. Sealing: Apply Slip- and stain-resistant sealer that is chemically neutral with a pH factor between 7 and 10; does not affect physical properties of terrazzo and method recommended by manufacturer.

C. Protection: Upon completion, the Work shall be ready for final inspection and acceptance by the owner or his agent. Provide final protection and maintain conditions, in a manner acceptable to Terrazzo Contractor, that ensure terrazzo is without damage or deterioration.