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SECTION 003500
Cementitious Decks and Toppings
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PART 1 - GENERAL
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| 1.1 |
SECTION INCLUDES
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A
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Labor, materials, tools, equipment and services required for
surface preparation and application of Spray-Crete coatings as specified
and in locations scheduled
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| 1.2 |
REFERENCES |
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A.
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ASTM D 4263:
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Standard Test Method for Indicating Moisture
in Concrete by the Plastic Sheet Method. |
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B.
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ASTM D 4258:
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Standard Practice for Surface Cleaning Concrete
for coating. |
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C.
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ASTM D 4260:
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Standard Practice for Acid Etching Concrete. |
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D.
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ASTM D 4262:
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Standard Test Method for pH of Chemically Cleaned
or Etched Concrete Surfaces. |
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E.
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SSPC-SP1:
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Specification for Solvent Cleaning of Steel Surfaces. |
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F.
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SSPC-SP2:
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Specification for Hand Tool Cleaning of Steel
Surfaces. |
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G.
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SSPC-SP3:
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Specification for Power Tool Cleaning of Steel
Surfaces. |
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| 1.3 |
SYSTEM DESCRIPTION |
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A. |
Products provided and installation by this Section are Spray-Crete
materials requiring applicable special expertise in surface preparation,
application, and safety procedures. |
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| 1.4 |
SUBMITTALS |
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A. |
General: Submit in accordance with Section 01300 |
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B. |
Product Data: |
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| 1. |
Submit manufacturer's descriptive literature fully describing
each product and solid contents by volume. |
| 2. |
Include manufacturer's recommendations for mixing, thinning,
application, and curing. |
| 3. |
Submit manufacturer's material safety data sheets.
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C. |
Samples: |
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| 1. |
Submit complete range of manufacturer's standard colors
for selection by Architect. |
| 2. |
Submit 24" x 24" samples of Spray-Crete system on ¼
inch hard board to demonstrate compliance with texture and color. |
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| 1.5 |
QUALITY ASSURANCE
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A |
Applicator Qualifications: |
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| 1. |
Applicator shall be licensed and approved by manufacturer
for this application. |
| 2. |
Applicator shall employ skilled mechanics to ensure
highest quality workmanship. Material to be applied by craftsman experienced
in the use of Spray-Crete products. |
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B. |
Regulatory Requirements: Comply with applicable codes, regulations,
ordinances, and laws retarding use and application of coating systems that
contain volatile organic compounds (VOC). |
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C. |
Pre-Application Conference: Prior to making field samples
and placing order for materials, Architect, Contractor, and installer shall
meet and agree on methods and schedule for application. |
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D. |
Mock-Ups: |
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| 1. |
Provide mock-up panel using materials specified for
final work. Construct mock-up as directed, and of full thickness.
Demonstrate the proposed range of color, texture, and workmanship
to be expected in the completed work. Obtain Architect's acceptance
of visual qualities of the sample panel. |
| 2. |
Leave approved mock-up in place as part of completed
work if mock-up can be incorporated into work in an acceptable manner.
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| 1.6 |
DELIVERY, STORAGE, AND HANDLING |
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A. |
Deliver materials to Project site in original,
factory-sealed, unopened, new containers bearing manufacturer's name and
label intact and legible.
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B. |
Store materials in a dry, well ventilated area
at temperature between 40 and 90 degrees F unless otherwise required by
manufacturer. Materials should be under cover and off the ground.
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C. |
Use only thinners recommended by coating system manufacturer
for each coating used. |
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| 1.7 |
PROJECT CONDITIONS |
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A. |
Apply coating materials only under following prevailing conditions: |
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| 1. |
Air and surface temperatures shall not exceed minimum
or maximum requirements for product to be applied during application
and curing of system components. (50 to 120 degrees F, unless otherwise
stated on product data sheet). Provide temporary heat and protection,
if necessary. Maintain specified temperature range not less than 24
hours before beginning application and not less than 72 hours after
completing application. |
| 2. |
Do not apply coatings to frozen surfaces or surfaces
containing frost. |
| 3. |
Relative humidity that is not above 85 percent and surface
temperature that is at least 5 degrees F above the dew point at the
time of application and for a minimum of 4 hours after application.
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| 4. |
Wind velocity must be under 20 mph (for exterior applications).
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B. |
Coordinate Spray-Crete coatings work with other
trades to ensure adequate illumination, ventilation, and dust-free environment
during application and curing of Spray-Crete coatings. |
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C. |
Protect adjoining surfaces not to be coated against damage
or soiling. |
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D. |
Maintain work area in a neat and orderly condition, removing
empty containers, rags, and rubbish daily from the site. |
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| PART 2 - PRODUCTS |
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| 2.1 |
MANUFACTURERS |
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A. |
Provide products manufactured by or approved
by Spray-Crete Systems 7906 Hopi Place, Tampa, Florida 33614. Telephone
813-249-7505, 800-382-7383. Fax 813-249-7907. Web Address: www.spray-crete.com
E-mail: info@spray-crete.com
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Substitutions will not be acceptable. |
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| 2.2 |
MATERIALS |
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A. |
Spray-Crete SC-1001 Bag Mix 50 lb.
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B. |
Spray-Crete Modified Bonding Additive (Standard Set).
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C. |
Spray-Crete Modified Bonding Additive (Set Quick).
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D. |
Spray-Crete SC-204 Titan Tough Urethane Enhanced Acrylic Concrete
Stain.
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E. |
Spray-Crete SC-206 Creative Colorant
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F. |
Spray-Crete SC-907 Flex-Top Epoxy Joint Sealer |
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G. |
Spray-Crete Citrus Degreaser |
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| 2.3 |
MIXING |
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A. |
Mix and thin materials in strict accordance with manufacturer's
latest printed instructions. Project site tinting of concrete stain will
not be allowed. |
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B. |
Do not use materials that exceed manufacturer's recommended
and printed shelf life. |
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| PART 3 - EXECUTION |
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| 3.1 |
EXAMINATION |
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A. |
Verify surfaces to be coated are dry, clean,
and ready to accept base coat in accordance with manufacturer's recommendations.
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B. |
Notify Architect in writing of unacceptable conditions
prior to commencing application.
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C. |
Do not coat over dirt, rust, scale, grease, moisture,
scuffed surfaces, or conditions other wise detrimental to formation of a
durable coating film.
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D. |
Do not begin work until unsatisfactory conditions
have been corrected |
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| 3.2 |
GENERAL PREPARATION |
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A. |
Protect surrounding and adjacent surfaces in
a manner recommended by the coating manufacturer.
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B. |
Scrape or grind protrusions flush with the surface.
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C. |
Dislodge dirt, mortar spatter, and other dry
materials by scraping or brushing. Remove dust and loose material by brushing,
sweeping, vacuuming, and/or blowing with clean, dry, high pressure air.
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D. |
Remove oil, wax, and grease by scraping off heavy
deposits and cleaning with Spray-Crete Citrus Degreaser or a trisodium phosphate
solution followed by a clean water rinse. |
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| 3.3 |
SUBSTRATE PREPARATION |
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A. |
Concrete Slab (on Grade): |
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| 1. |
For optimum performance of the Spray-Crete System new
concrete should be cured for 28 days at 75 degrees F . The absolute
minimum cure time at 75 degrees F is 7 days.
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| 2. |
Obtain optimum surface profile before installing the
Spray-Crete System. Surface profile should be that of 80 grit sand
paper. Obtain this profile by various methods such as blast cleaning,
scarification, sand blasting or acid etching(ASTM D 4260). Check for
proper PH after any acid etching (ASTM D 4262).
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| 3. |
Surface must be pressure washed before application with
a machine rated at a minimum 3000 psi and at least 4.5 gpm. Spray-Crete
recommends the use of a turbo tip during this process.
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| 4. |
Level protrusions and remove other surface imperfections.
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| 5. |
Surfaces must be free of excessive moisture (ASTM D
4263), laitance, concrete dust, form release agents, curing compounds,
loose cement, hardeners, dirt and other foreigh material (ASTM D 4258).
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| 6. |
Remove all oil and grease with Spray-Crete Citrus Degreaser
or a solution of trisodium phosphate. Remove rust stains with a solution
of sodium metasilicate being wetted thoroughly with water. Rinse well
and allow to dry thoroughly. |
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B. |
Concrete (Walls): |
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| 1. |
Allow new concrete to cure a minimum of 28 days at 75
degrees F prior to application of the coating system.
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| 2. |
If an acceptable surface profile is not present, Clean
and profile concrete in accordance with ASTM D 4258 and ASTM D 4260.
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| 3. |
Level protrusions and remove other surface imperfections.
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| 4. |
Remove dirt, loose material, scale, powder, and other
foreign material.
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| 5. |
Surfaces must be free of excessive moisture (ASTM D
4263), laitance concrete dust, form release agents, curing compounds,
loose cement, hardeners, and dirt.
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| 6. |
Remove all oil and grease with Spray-Crete Citrus Degreaser
or a solution of trisodium phosphate. Remove rust stains with a solution
of sodium metasilicate being wetted thoroughly with water. Rinse well
and allow to dry thoroughly. |
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C. |
Concrete Masonry Units |
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| 1. |
Allow new concrete to cure a minimum of 28 days at 75
degrees F prior to application of the coating system.
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| 2. |
Level protrusions and remove other surface imperfections.
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| 3. |
Remove dirt, loose material, scale, powder, and other
foreign material.
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| 4. |
Surfaces must be free of laitance, dust, and loose mortar.
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| 5. |
Remove oil and grease with a solution of trisodium phosphate.
Remove rust stains with solution of sodium metasilicate being wetted
thoroughly with water. Rinse well and allow to dry thoroughly.
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| 6. |
Concrete masonry units must be dry and protected from
water saturation during curing. |
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D. |
Structural Steel: |
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| 1. |
Interior and exterior exposed structural steel shall
be surface prepared in accordance with Steel Structures Painting Council
cleaning procedures outlined in SSPC-SP1,SSPC-SP2 and SSPC-SP3. |
| 2. |
After the initial surface preparation described above
for exterior and interior exposed structural steel and metal, remove
all oil and grease from surfaces in accordance with SSPC-SP1.
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| 3.4 |
APPLICATION |
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A. |
Mix and apply Spray-Crete coating materials in
accordance with the manufacturer's directions. Apply at the minimum specified
rate of coverage by the method recommended by the manufacturer. |
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B. |
Apply Spray-Crete coating materials by brush,
roller, or spray and Spray-Crete cement materials by trowel, squeegee or
hopper gun spray method to scheduled surfaces in accordance with the manufacturer's
recommendations. |
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| 1. |
Stir all material as required for application of the
materials. |
| 2. |
Comply with the manufacturer's recommendations for drying
or curing time between coats.
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| 3. |
Finished surfaces shall be uniform in finish and color. |
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C. |
Work material into surface voids and hairline
cracks. Cut in edges clean and sharp, without overlapping, where work joins
other materials or colors. |
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D. |
Allow each coat to dry thoroughly before applying
the next coat.. |
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E. |
Make finish coats smooth uniform in texture and
color, and free of brush marks, laps, runs, dry spray, over spray and skipped
or missed areas. |
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| 3.5 |
FIELD QUALITY CONTROL |
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Surface preparation must be accepted before proceeding with
the coating application. |
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| 3.6 |
ADJUSTING |
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A. |
Touch up and repair damaged or otherwise unacceptable work. |
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| 1. |
Damaged work will be back charged to the party that
caused said damage. |
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| 3.7 |
CLEANING |
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Remove all coating spatters from glass and adjoining surfaces. |
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| 3.8 |
PROTECTION |
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Protect installed Spray-Crete systems against damage by other
work in progress. Maintain protection in place until completion of Project
and acceptance by Owner. |
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| 3.9 |
SCHEDULE OF EXTERIOR EXPOSURES |
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| 3.10 |
SCHEDULE OF INTERIOR EXPOSURES |
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END OF SECTION
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