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HomeMy WebLinkAbout035300.13-Seashell-Aggregate-Concrete-Floor-Topping_Rev_1Dennis Yarmouth Intermediate Middle School March 2, 2021 Dennis Yarmouth Regional School District Addendum #9 Perkins Eastman DPC, project #71011 SEASHELL-AGGREGATE CONCRETE FLOOR TOPPING 03 5300.13 - 1 SECTION 03 5300.13 SEASHELL-AGGREGATE CONCRETE FLOOR TOPPING PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section. 1.2 SUMMARY A. Section includes seashell-aggregate concrete floor topping. B. Related Requirements: 1. Section 03 3000 “Cast-In-Place Concrete.” 2. Section 03 3543 “Polished Concrete Finishing.” 1.3 PREINSTALLATION MEETINGS A. Preinstallation Conference: Conduct conference at Project site. 1.4 ACTION SUBMITTALS A. Make Submittals in accordance with Section 01 3300 “Submittal Procedures.” B. Product Data: For each type of product. 1.5 QUALITY ASSURANCE A. Mockups: Place concrete floor topping mockups to demonstrate typical joints, surface finish, bonding, texture, tolerances, and standard of workmanship. 1. Build mockups approximately 100 sq. ft. in the location indicated or, if not indicated, as directed by Architect. 2. If Architect determines that mockups do not meet requirements, demolish and remove them from the site and cast others until mockups are approved. 3. Approved mockups may become part of the completed Work if undisturbed at time of Substantial Completion. 1.6 DELIVERY, STORAGE, AND HANDLING A. Deliver materials in original packages and containers, with seals unbroken, bearing manufacturer's labels indicating brand name and directions for storage, mixing with other components, and application. Dennis Yarmouth Intermediate Middle School March 2, 2021 Dennis Yarmouth Regional School District Addendum #9 Perkins Eastman DPC, project #71011 SEASHELL-AGGREGATE CONCRETE FLOOR TOPPING 03 5300.13 - 2 B. Store materials to comply with manufacturer's written instructions to prevent deterioration from moisture or other detrimental effects. 1.7 FIELD CONDITIONS A. Environmental Limitations: Comply with manufacturer's written instructions for substrate temperature and moisture content, ambient temperature and humidity, ventilation, and other conditions affecting concrete floor topping performance. 1. Place concrete floor topping only when ambient temperature and temperature of base slabs are between 50 and 86 deg F. B. Close areas to traffic during topping application and, after application, for time period recommended in writing by manufacturer. PART 2 - PRODUCTS 2.1 SEASHELL-AGGREGATE CONCRETE FLOOR TOPPINGS A. Seashell-Aggregate Concrete Floor Topping: Factory-prepared and dry-packaged mixture of graded, seashell aggregate; portland cement or blended hydraulic cement; plasticizers; and other admixtures to which only water needs to be added at Project site. B. Seashells: Hard, sound, durable, smooth, and free of all deleterious materials and staining qualities. Sharp, jagged edges will not be accepted. 1. Shells shall be thoroughly washed so that it is free of dust, dirt, and clay particles. 2. All seashells shall be from same source throughout project. 3. Seashell Size: Size shall be a range of ¼ inch to 1 inch. 4. Shells shall be in a color range of cold and warm tones: tan, gray, blue, white, yellow and buff. C. Approved Seashell Suppliers: 1. Emerald Landscape Supply, 38 Hedges Pond Rd. Plymouth, MA 02360. 2. Cypress Creek Landscape Supply, 12734 N. Florida Ave., Tampa, FL. 3. Carroll’s Building Materials, 2001 13th Ave North, St. Petersburg, FL 33713 4. Harken’s Landscape Supply & Garden Center, 287 South Main Street (Rt 5), East Windsor, CT. 2.2 CURING MATERIALS A. Evaporation Retarder: Waterborne, monomolecular film forming; manufactured for application to fresh concrete. B. Absorptive Cover: AASHTO M 182, Class 2, burlap cloth made from jute or kenaf, weighing approximately 9 oz./sq. yd. when dry. C. Moisture-Retaining Cover: ASTM C 171, polyethylene film or white burlap-polyethylene sheet. D. Water: Potable. Dennis Yarmouth Intermediate Middle School March 2, 2021 Dennis Yarmouth Regional School District Addendum #9 Perkins Eastman DPC, project #71011 SEASHELL-AGGREGATE CONCRETE FLOOR TOPPING 03 5300.13 - 3 2.3 RELATED MATERIALS Semirigid Joint Filler: Two-component, semirigid, 100 percent solids epoxy resin with a Type A Shore durometer hardness of 80 or aromatic polyurea with a Type A Shore durometer hardness range of 90 to 95 according to ASTM D 2240. A. Joint-Filler Strips: ASTM D 1751, asphalt-saturated cellulosic fiber or ASTM D 1752, cork or self-expanding cork. B. Portland Cement: ASTM C 150/C 150M, Type I or II. C. Sand: ASTM C 404, fine aggregate passing No. 16 sieve. D. Water: Potable. E. Acrylic-Bonding Agent: ASTM C 1059/C 1059M, Type II, non-redispersible, acrylic emulsion or styrene butadiene. 2.4 MIXING A. Bonding Slurry: Mix 1 part portland cement and 2 parts sand with water and an acrylic-bonding agent according to manufacturer's written instructions to a thick paint consistency. B. Floor Topping: Mix concrete floor topping materials and water in appropriate drum-type batch machine mixer or truck mixer according to manufacturer's written instructions. PART 3 - EXECUTION 3.1 EXAMINATION A. Examine substrates, with Installer present, for conditions affecting performance of the Work. B. Verify that base concrete slabs comply with scratch finish requirements specified in Section 03 3000 "Cast-in-Place Concrete." C. Verify that base slabs are visibly dry and free of moisture. Test for capillary moisture by the plastic sheet method according to ASTM D 4263. D. Proceed with application only after unsatisfactory conditions have been corrected. 3.2 PREPARATION A. Existing Concrete: Remove existing surface treatments and deteriorated and unsound concrete. Mechanically abrade base slabs to produce a heavily scarified surface profile with an amplitude of 1/4 inch. 1. Prepare and clean existing base slabs according to concrete floor topping manufacturer's written instructions. Fill voids, cracks, and cavities in base slabs. 2. Mechanically remove contaminants from existing concrete that might impair bond of floor topping. 3. Saw cut contraction and construction joints in existing concrete to a depth of 1/2 inch and fill with semirigid joint filler. Dennis Yarmouth Intermediate Middle School March 2, 2021 Dennis Yarmouth Regional School District Addendum #9 Perkins Eastman DPC, project #71011 SEASHELL-AGGREGATE CONCRETE FLOOR TOPPING 03 5300.13 - 4 B. Install joint-filler strips where topping abuts vertical surfaces, such as column pedestals, foundation walls, grade beams, and other locations, as indicated. 1. Extend joint-filler strips full width and depth of joint, terminating flush with topping surface unless otherwise indicated. 2. Install joint-filler strips in lengths as long as practicable. Where more than one length is required, lace or clip sections together. 3.3 FLOOR TOPPING APPLICATION A. Start floor topping application in presence of manufacturer's technical representative. B. Deferred Floor Topping: Within 72 hours of placing base slabs, mix and scrub bonding slurry into dampened concrete to a thickness of 1/16 to 1/8 inch, without puddling. Place floor topping while slurry is still tacky. C. Place concrete floor topping continuously in a single layer, tamping and consolidating to achieve tight contact with bonding surface. Do not permit cold joints or seams to develop within pour strip. 1. Screed surface with a straightedge and strike off to correct elevations. 2. Slope surfaces uniformly where indicated. 3. Begin initial floating, using bull floats to form a uniform and open-textured surface plane free of humps or hollows. D. Finishing: Consolidate surface with power-driven floats as soon as concrete floor topping can support equipment and operator. Restraighten, cut down high spots, and fill low spots. Repeat float passes and restraightening until concrete floor topping surface has a uniform, smooth, granular texture. 1. Hard Trowel Finish: After floating surface, apply first trowel finish and consolidate concrete floor topping by power-driven trowel without allowing blisters to develop. Continue troweling passes and restraighten until surface is smooth and uniform in texture. E. Construction Joints: Construct joints true to line with faces perpendicular to surface plane of concrete floor topping, at locations indicated or as approved by Architect. 1. Coat face of construction joint with epoxy adhesive at locations where concrete floor topping is placed against hardened or partially hardened concrete floor topping. F. Contraction Joints: Form weakened-plane contraction joints with power saws equipped with shatterproof abrasive or diamond-rimmed blades. Cut 1/8-inch- wide joints into concrete floor topping when cutting action will not tear, abrade, or otherwise damage surface and before random contraction cracks develop. 1. Form joints in concrete floor topping over contraction joints in base slabs unless otherwise indicated. 2. Construct contraction joints for a depth equal to one-half of concrete floor topping thickness, but not less than 1/2 inch deep. 3.4 PROTECTING AND CURING A. General: Protect freshly placed concrete floor topping from premature drying and excessive cold or hot temperatures. Dennis Yarmouth Intermediate Middle School March 2, 2021 Dennis Yarmouth Regional School District Addendum #9 Perkins Eastman DPC, project #71011 SEASHELL-AGGREGATE CONCRETE FLOOR TOPPING 03 5300.13 - 5 B. Evaporation Retarder: Apply evaporation retarder to concrete floor topping surfaces in hot, dry, or windy conditions before and during finishing operations. Apply according to manufacturer's written instructions after placing, screeding, and bull floating or darbying floor topping, but before float finishing. C. Begin curing immediately after finishing concrete floor topping. Cure by one or a combination of the following methods, according to concrete floor topping manufacturer's written instructions: 1. Moisture Curing: Keep surfaces continuously moist for not less than seven days with water, continuous water-fog spray, or absorptive cover, water saturated and kept continuously wet. Cover topping surfaces and edges with 12-inch lap over adjacent absorptive covers]. 2. Moisture-Retaining-Cover Curing: Cover concrete surfaces with moisture-retaining cover for curing concrete, placed in widest practicable width, with sides and ends lapped at least 12 inches, and sealed by waterproof tape or adhesive. Cure for not less than seven days. Immediately repair any holes or tears during curing period, using cover material and waterproof tape. 3.5 JOINT FILLING A. Prepare and clean contraction joints and install semirigid joint filler, according to manufacturer's written instructions, once topping has fully cured. B. Remove dirt, debris, saw cuttings, curing compounds, and sealers from joints; leave contact faces of joints clean and dry. C. Install semirigid joint filler full depth of contraction joints. Overfill joint and trim semirigid joint filler flush with top of joint after hardening. 3.6 REPAIR A. Defective Topping: Repair and patch defective concrete floor topping areas, including areas that have not bonded to concrete substrate. 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