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C. Troweled finish: <br /> 1) Power trowel surface to smooth finish. <br /> 2) Hand trowel areas inaccessible to power trowel. <br /> d. Broom or belt finish: Draw broom or burlap belt across surface after floating in accordance with P.C.A. <br /> instructions. <br /> e. Conform to ACI 301,Section 11.9,Class B tolerance. <br /> E. Finish Schedule <br /> 1. As-Cast Finish: Concealed walls,columns,beams,slabs. <br /> 2. Rubbed Finish: Exposed concrete-walls,columns,beams,and wall caps. <br /> 3. Float Finish: Slabs to receive topping or setting beds. <br /> 4. Troweled Finish: <br /> a. Interior concrete floors: Steel troweled finish <br /> ' b. Exposed concrete stair treads: Steel troweled finish with non-slip aggregate. <br /> 5. Broom Finish <br /> a. Exterior platforms,aprons,ramps,loading dock. <br /> 3.06 CURING AND PROTECTION <br /> A. Protect fresh concrete from premature drying and excessively hot or cold temperatures and maintain with minimal <br /> moisture loss at a relatively constant temperature above 55°F for a period of time given below. <br /> tB. Follow finishing operations with initial curing. Keep concrete continuously moist after finishing until curing <br /> materials are applied. Use the following materials or methods: <br /> 1. For concrete to remain exposed (not scheduled for finish): Apply one coat of interior curing compound <br /> initially and an additional coat just prior to substantial completion. <br /> 2. For interior concrete to receive floor finish (except high performance coatings): Apply one coat of curing <br /> compound for use with hardener and apply hardener coat to concrete that is dry, clean, free of dirt, oil grease <br /> and cured for seven days. Apply coatings in strict accordance to manufacturers printed instructions. <br /> 3. For interior concrete to receive high performance coating or concrete floor sealer: Use moisture-cover curing <br /> technique. <br /> 4. For exterior or semi exterior concrete: Apply one coat of exterior curing compound in strict accordance with <br /> manufacturers printed instructions. After allowing concrete to cure for at least 28 days and insuring concrete <br /> is dry,clean,free of dirt,oil,grease,loose scale or other contaminates,apply two coats of linseed oil treatment <br /> in strict accordance to manufactures printed instructions. <br /> C. Continue curing until the cumulative number of days or fractions thereof,not necessarily consecutive,during which <br /> temperature of air in contact with concrete is above 50°F has totaled 7 days. Do not permit rapid drying at end of <br /> curing period. Maintain curing for members with specified strengths of 6000 psi and above until laboratory <br /> cylinders reach the 28-day specified strength. <br /> 03300-9 No.99132-CP2 <br />