36C24920R0008-0006006.pdf

Department of Veterans Affairs Network Contracting Office 9 VA: 61417-112 Renovate Building 1 Clinical Lab Memphis VAMC, Memphis Tn.

03.04.2020

Addendum #001

07-14

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SECTION 09 67 23

RESINOUS FLOORING

PART 1 – GENERAL

1.1 RELATED DOCUMENTS

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

1.2 SUMMARY

A. This section includes the following:

1. Resinous flooring system as shown on the drawings and in schedules.

1.3 SYSTEM DESCRIPTION

A. The work shall consist of preparation of the substrate, the furnishing and application of a cementitious urethane and a resinous flooring system with decorative chip broadcasts and topcoat. The system shall have the color and texture as specified by the Owner with a nominal thickness of 3/16 inch. It shall be applied to the prepared area(s) as defined in the plans strictly in accordance with the Manufacturer's recommendations.

B. Cove base (if required) to be applied where noted on plans and per manufacturers standard details unless otherwise noted.

1.4 SUBMITTALS

A. Product Data: Latest edition of Manufacturer's literature including performance data and installation procedures.

B. Manufacturer’s Material Safety Data Sheet (MSDS) for each product being used.

C. Samples: A 3 x 3 inch square sample of the proposed system. Color, texture, and thickness shall be representative of overall appearance of finished system subject to normal tolerances.

1.5 QUALITY ASSURANCE

A. The Manufacturer shall have a minimum of 10 years experience in the production, sales, and technical support of epoxy and urethane industrial flooring and related materials.

B. The Applicator shall have experience in installation of the flooring system as confirmed by the manufacturer in all phases of surface preparation and application of the product specified.

C. No requests for substitutions shall be considered that would change the generic type of the specified System.

D. System shall be in compliance with requirements of United States Department of Agriculture (USDA), Food, Drug Administration (FDA), and local Health Department.

E. A pre-installation conference shall be held between Applicator, General Contractor and the Owner to review and clarification of this specification, application procedure, quality control, inspection and acceptance criteria and production schedule.

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1.6 PRODUCT DELIVERY, STORAGE, AND HANDLING

A. Packing and Shipping

1. All components of the system shall be delivered to the site in the Manufacturer's packaging, clearly identified with the product type and batch number.

B. Storage and Protection

1. The Applicator shall be provided with a storage area for all components. The area shall be between 60 F and 90 F, dry, out of direct sunlight and in accordance with the Manufacturer's recommendations and relevant health and safety regulations.

2. Copies of Material Safety Data Sheets (MSDS) for all components shall be kept on site for review by the Engineer or other personnel.

C. Waste Disposal

1. The Applicator shall be provided with adequate disposal facilities for non-hazardous waste generated during installation of the system.

1.7 PROJECT CONDITIONS

A. Site Requirements

1. Application may proceed while air, material and substrate temperatures are between 60 F and 85 F providing the substrate temperature is above the dew point. Outside of this range, the Manufacturer shall be consulted.

2. The relative humidity in the specific location of the application shall be less than 85 % and the surface temperature shall be at least 5 F above the dew point.

3. The Applicator shall ensure that adequate ventilation is available for the work area.

4. The Applicator shall be supplied with adequate lighting equal to the final lighting level during the preparation and installation of the system.

B. Conditions of new concrete to be coated with cementitious urethane material.

1. Concrete shall be moisture cured for a minimum of 3 days and have fully cured a minimum of 5 days in accordance with ACI-308 prior to the application of the coating system pending moisture tests.

2. Concrete shall have a flat rubbed finish, float or light steel trowel finish (a hard steel trowel finish is neither necessary nor desirable).

3. Sealers and curing agents should not be used.

4. Concrete shall have a minimum design strength of 3.500 psi. and a maximum water/cement ratio of 0.45

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5. Concrete surfaces on grade shall have been constructed with a vapor barrier to protect against the effects of vapor transmission and possible delamination of the system.

C. Safety Requirements

1. All open flames and spark-producing equipment shall be removed from the work area prior to commencement of application.

2. "No Smoking" signs shall be posted at the entrances to the work area.

3. The Owner shall be responsible for the removal of foodstuffs from the work area.

4. Non-related personnel in the work area shall be kept to a minimum.

1.8 WARRANTY

A. Manufacturer warrants that material shipped to buyers at the time of shipment substantially free from material defects and will perform substantially to manufacturer’s published literature if used in accordance with the latest prescribed procedures and prior to the expiration date.

B. Manufacturer’s liability with respect to this warranty is strictly limited to the value of the material purchase.

PART 2 – PRODUCTS

2.1 FLOORING

A. Dur-A-Flex, Inc, ACCELERA HC self-leveling, decorative chip broadcast, cementitious urethane/blended polymer seamless flooring system

1. System Materials:

a. Topping: Dur-A-Flex, Inc, Poly-Crete MD/SL resin, hardener and

SL aggregate.

b. The broadcast aggregate shall be Dur-A-Flex, Inc. Micro or Macro chips.

c. 2nd Broadcast Coat: Dur-A-Flex, Inc, ACCELERA resin and hardener.

d. Grout Coat: Dur-A-Flex, Inc. ACCELERA resin and hardener.

e. Topcoat: Dur-A-Flex, Inc. ACCELERA resin and hardener.

2. Patch Materials

a. Shallow Fill and Patching: Use Dur-A-Flex, Inc. Poly-Crete MD

(up to ¼ inch).

b. Deep Fill and Sloping Material (over ¼ inch): Use Dur-A-Flex, Inc. Poly-Crete WR.

B. The Sherwin-Williams Company, BioFlake Floor System with Pace-Cote 4844 topcoat.

2.2 MANUFACTURER

A. Dur-A-Flex, Inc., 95 Goodwin Street, East Hartford, CT 06108, Phone:

(860) 528-9838, Fax: (860) 528-2802

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B. The Sherwin-Williams Company, 101 Prospect Avenue, Cleveland, OH, 44101, General Polymers Division.

C. Manufacturer of Approved System shall be single source.

D. Substitutions permitted. All substitutions must be reviewed by COR and A/E prior to bidding and contract award.

2.3 PRODUCT REQUIREMENTS

A. Topping Poly-Crete SL

1. Percent Reactive 100 %

2. VOC 0 g/L

3. Bond Strength to Concrete ASTM D 4541 400 psi, substrates fails

4. Compressive Strength, ASTM C579 9,000 psi

5. Tensile Strength, ASTM D 638 2,175 psi

6. Flexural Strength, ASTM D 790 5,076 psi

7. Impact Resistance @ 125 mils, MIL D-3134, 160 inch lbs

B. Broadcast, Grout and Topcoats ACCELERA

1. Percent Solids 100 %

2. VOC 0 g/L

3. Bond Strength to Concrete ASTM D 4541 400 psi, substrates fails

4. Hardness, Shore D ASTM D2240 70

5. Compressive Strength, ASTM C579 18,000 psi

6. Tensile Strength, ASTM D638 2,600 psi

7. Abrasion Resistance, ASTM D4060 27 mg loss

C-17 Wheel, 1,000 gm load, 1,000 cycles

8. Potlife @ 70 F 7 – 10 minutes

9. Gloss (ASTM D523) 60° 90

10. Coefficient of Friction (ASTM D2047) 0.6

PART 3 – EXECUTION

3.1 EXAMINATION

A. Examine substrates, areas and conditions, with Applicator present, for compliance with requirements for maximum moisture content, installation tolerances and other conditions affecting flooring performance.

1. Verify that substrates and conditions are satisfactory for flooring installation and comply with requirements specified.

3.2 PREPARATION

A. General

1. New and existing concrete surfaces shall be free of oil, grease, curing compounds, loose particles, moss, algae growth, laitance, friable matter, dirt, and bituminous products.

2. Moisture Testing: Perform tests recommended by manufacturer and as follows.

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a. Perform anhydrous calcium chloride test ASTM F 1869-98.

Application will proceed only when the vapor/moisture emission rates from the slab is less than and not higher than 20 lbs/1,000 sf/24 hrs.

b. Perform relative humidity test using is situ probes, ASTM F 2170. Proceed with installation only after substrates have a maximum 99% relative humidity level measurement.

c. If the vapor drive exceeds 99% relative humidity or 20 lbs/1,000 sf/24 hrs then the Owner and/or Engineer shall be notified and advised of additional cost for the possible installation of a vapor mitigation system that has been approved by the manufacturer or other means to lower the value to the acceptable limit.

3. There shall be no visible moisture present on the surface at the time of application of the system. Compressed oil-free air and/or a light passing of a propane torch may be used to dry the substrate.

4. Mechanical surface preparation

a. Shot blast all surfaces to receive flooring system with a mobile steel shot, dust recycling machine (Blastrac or equal).

All surface and embedded accumulations of paint, toppings hardened concrete layers, laitance, power trowel finishes and other similar surface characteristics shall be completely removed leaving a bare concrete surface having a minimum profile of CSP 4-5 as described by the International Concrete Repair Institute.

b. Floor areas inaccessible to the mobile blast machines shall be mechanically abraded to the same degree of cleanliness, soundness and profile using diamond grinders, needle guns, bush hammers, or other suitable equipment.

c. Where the perimeter of the substrate to be coated is not adjacent to a wall or curb, a minimum 1/4 inch key cut shall be made to properly seat the system, providing a smooth transition between areas. The detail cut shall also apply to drain perimeters and expansion joint edges.

d. Cracks and joints (non-moving) greater than 1/8 inch wide are to be chiseled or chipped-out and repaired per manufacturer’s recommendations.

5. At spalled or worn areas, mechanically remove loose or delaminated concrete to a sound concrete and patch per manufactures recommendations.

3.3 APPLICATION

A. General

1. The system shall be applied in distinct steps as listed below:

a. Substrate preparation

b. Topping/overlay application with decorative chip broadcast.

c. Resin application with decorative chip broadcast

d. Grout coat application,

e. Topcoat application

2. Immediately prior to the application of any component of the system, the surface shall be dry and any remaining dust or loose

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09 67 23 - 6 particles shall be removed using a vacuum or clean, dry, oil-free compressed air.

3. The handling, mixing and addition of components shall be performed in a safe manner to achieve the desired results in accordance with the Manufacturer's recommendations.

4. The system shall follow the contour of the substrate unless pitching or other leveling work has been specified by the Architect.

5. A neat finish with well-defined boundaries and straight edges shall be provided by the Applicator.

B. Topping

1. The topping shall be applied as a self-leveling system as specified by the Architect. The topping shall be applied in one lift with a nominal thickness of 1/8 inch.

2. The topping shall be comprised of three components, a resin, hardener and filler as supplied by the Manufacturer.

3. The hardener shall be added to the resin and thoroughly dispersed by suitably approved mechanical means. SL Aggregate shall then be added to the catalyzed mixture and mixed in a manner to achieve a homogenous blend.

4. The topping shall be applied over horizontal surfaces using ½ inch “v” notched squeegee, trowels or other systems approved by the Manufacturer.

5. Immediately upon placing, the topping shall be degassed with a loop roller.

6. Chip aggregate shall be broadcast to excess into the wet resin, Macro chip at the rate of 0.1 lbs/sf and Micro chip at the rate of 0.15 lbs/sf.

7. Allow material to fully cure. Vacuum, sweep and/or blow to remove all loose aggregate.

C. Second Broadcast Coat

1. The second broadcast coat shall be comprised of two components: a resin and a hardener as supplied by the Manufacturer and mixed per manufacturer instructions.

2. The hardener shall be added to the resin and thoroughly mixed by suitably approved mechanical means.

3. The second broadcast coat shall be applied over horizontal surfaces using a squeegee and cross rolled with a 3/8 inch nap roller at the rate of 65 SF/kit.

4. Chip aggregate shall be broadcast to excess into the wet resin, the rate of 0.1 lbs/sf and at the rate of 0.15 lbs/sf.

5. Allow material to fully cure. Vacuum, sweep and/or blow to remove all loose aggregate.

D. Grout Coat

1. The grout coat shall be comprised of resin and hardener mixed per the manufacturer’s instructions.

2. The grout coat shall be applied using a squeegee and cross rolled with a 3/8 inch nap roller at the rate of 65 SF/kit.

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E. Topcoat

1. The grout coat shall be comprised of resin and hardener mixed per the manufacturer’s instructions.

2. The grout coat shall be applied using a squeegee and cross rolled with a 3/8 inch nap roller at the rate of 200 SF/kit.

3. The finished floor will have a nominal thickness of 3/16 inch.

3.4 FIELD QUALITY CONTROL

A. Tests, Inspection

1. The following tests shall be conducted by the Applicator:

a. Temperature

1. Air, substrate temperatures and, if applicable, dew point.

b. Coverage Rates

1. Rates for all layers shall be monitored by checking quantity of material used against the area covered.

3.5 CLEANING AND PROTECTION

A. Cure flooring material in compliance with manufacturer’s directions, taking care to prevent their contamination during stages of application and prior to completion of the curing process.

B. Remove masking. Perform detail cleaning at floor termination, to leave cleanable surface for subsequent work of other sections.

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