ࡱ> CEB#` bjbj .2`t !< d+P!P!P!P!P!"""*******$~,h.@ +;$"";$;$ +P!P!;+%%%;$P!P!*%;$*%%:*,*P!D! p$2! ;$N* *4+0d+* &/%&/*&/*">",%"$#""" + +% """d+;$;$;$;$  $ 4:"\  ϲȮ Guide Specification Concrete Resurfacer (No. 1131) Polymer Modified, Shrinkage Compensated, Cement Based, 1 Component Concrete Resurfacer Section 03 01 00 Maintenance of Concrete Section 03 53 00 Concrete Topping PART 1 GENERAL 1.10 SUMMARY A. Provide one component, polymer modified, shrinkage compensated, cement based, squeeze applied mortar for repair and resurfacing of existing concrete substrate. B. Related Sections: Other specification sections which relate directly to the work of this section include the following: Section 030100: Concrete Maintenance Section 033000: Cast-In-Place Concrete 1.20 SUBMITTALS A. Product Data: Submit manufacturers product data and installation for each material and product used. Include manufacturers Material Safety Data Sheets. 1.30 REFERENCES A. ASTM C 109: Compressive Strength of Hydraulic Mortars B. ASTM C 157: Length Change of Hardness Hydraulic Cement 1.40 QUALITY ASSURANCE A. Manufacturers Qualifications: The manufacturer shall be a company with at least fifteen years experience in the manufacturer and marketing cementitious dry packaged repair materials. B. Installers Qualifications: The contractor shall be qualified to perform the work specified by reason of experience. 1.50 DELIVERY, STORAGE AND HANDLING A. Deliver products in original packaging, labeled with product identification, manufacturer, batch number and shelf life. B. Store products in a dry area. Protect from direct sunlight. C. Handle products in accordance with manufacturers printed recommendations. PART 2 PRODUCTS 2.10 MATERIALS A. Polymer modified and shrinkage compensated, hydraulic cement based one component Concrete Resurfacer. Comply with the following: 1. Manufacturer: Concrete Resurfacer as manufactured by the ϲȮ Companies, One Securities Centre, 3490 Piedmont Road, NE, Suite 1300, Atlanta, GA 30305; telephone (404) 634-9100. 2. Performance and Physical Properties at 73 degrees F and 50 percent relative humidity: a. Compressive Strength, ASTM C 109 (Air Cured): 1000 psi (6.9 MPa) @ 24 hours, 3000 psi (20.71 MPa) @ 7 days and 4500 psi (31.0 MPa) @ 28 days b. Length Change, ASTM C 157 Modified: Stored in Water < +0.15% Stored in Air < - 0.15% c. Walk on Time: 6 hours d. Drive on Time: 24 hours PART 3 EXECUTION 3.10 EXAMINATION A. Examine substrates and conditions under which materials will be installed. Do not proceed with installation until unsatisfactory conditions are corrected. B. Coordinate installation with adjacent work to ensure proper sequence of construction. Protect adjacent areas landscaping from contact due to mixing and handling of materials. 3.20 SURFACE PREPARATION: Comply with manufacturers printed instructions and the following: 1. Existing concrete must be rigorously cleaned to ensure proper adhesion of Concrete Resurfacer. Pressure wash thoroughly with a 3,500 psi (24MPa) pressure washer. 2. Level spalled areas, pits or cracks with ϲȮ Concrete Resurfacer in trowelable consistency. Use approximately one part water to 7 parts Concrete Resurfacer by volume. Allow the repairs to harden before resurfacing the entire area. 3. Section off the work into areas no larger than about 100 sq. ft. (9.3 m). Control joints and expansion joints must be maintained. Use weather stripping or duct tape to prevent Concrete Resurfacer from flowing into joints. 3.30 MIXING: Comply with manufacturers printed instructions and the following: Mix in a five-gallon (19 L) bucket with a , (12 mm) drill and paddle mixer. Larger quantities can be mixed using a Mortar Mixer. 2. Add approximately 5.5 pts. (2.6 L) of water per 40-lb (18.1 kg) bag. Add the powder to the water and mix to a lump free pourable consistency. Add water sparingly to reach the desired consistency. Do not exceed 7 pints (3.3 L) of water per 40-lb (18.1 Kg) bag. 3. ϲȮ Concrete Resurfacer has a working time of about 20 minutes at 73F (23C). In hotter weather, working time will be reduced. 3.40 APPLICATION: Comply with manufacturers printed instructions and the following: Saturate the surface with water then remove any standing water. 2. Pour Resurfacer on to the prepared surface and spread with a long handled squeegee. Use the squeegee to scrub the material into the surface. 3. For a slip resistant professional finish, follow within five minutes with a broom making full strokes across the full distance of the current Resurfacer work area without stopping. If desired a concrete edger can be used around the edges within 20 minutes of pouring. 4. Do not apply if temperatures are below 50F (10C) or are expected to go below 40 (4C) within a 24 hour period. Use cold water in hot weather or hot water in cold weather to achieve desired grout temperature. 3.50 CURING 1. Under normal conditions no special curing is required. Keep temperature above 50F (10C) for 24 hours after finishing. During extreme wind and sun conditions, moist cure with a water fog spray twice daily for 24 - 48 hours after application. 2. Protect from rain for at least 6 hours, longer in cool or damp weather. Do not cover unless immediate rain protection is necessary. 3. No sealer is required. 3.60 CLEANING A. Remove excess material before material cures. If material has cured, remove using mechanical methods that will not damage substrate. 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