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<br />Copyright 2002 AIA <br /> <br />MASTERSPEC Short Form <br /> <br />08/02 (R 05/06) <br /> <br />will match adjacl~nt surfaces. Compress grout into voids by grinding surface. In a <br />swirling motion, finish surface with a cork float. <br /> <br />D. Related Unformed Surfaces: At tops of walls, horizontal offsets, and similar unformed surfaces <br />adjacent to formed surfaces, strike off smooth and fmish with a texture matching adjacent <br />formed surfaces. Continue fmal surface treatment of formed surfaces uniformly across adjacent <br />unformed surfaces, unle:;s otherwise indicated. <br /> <br />3.8 FINISHING FLOORS }..NJ) SLABS <br /> <br />A. General: Comply with ACI302.1R recommendations for screeding, restraightening, and <br />fmishing operations for I;oncrete surfaces. Do not wet concrete surfaces. <br /> <br />B. Scratch Finish: While still plastic, texture concrete surface that has been screeded and bull- <br />floated or darbied. Us<;: stiff brushes, brooms, or rakes to produce a profile amplitude of 1/4 <br />inch (6 1illn) in 1 direction. <br /> <br />1. Apply scratch fmish to surfaces [indicated] [and] [to receive concrete floor toppings] <br />[to receive mortar setting beds for bonded cementitious floor fInishes] <Insert <br />locations> . <br /> <br />C. Float Finish: ConsolidaJe surface with power-driven floats or by hand floating if area is small <br />or inaccessible to power driven floats. Restraighten, cut down high spots, and f1l1 low spots. <br />Repeat float passes and restraightening until surface is left with a uniform, smooth, granular <br />texture. <br /> <br />1. Apply float finish to surfaces [indicated] [to receive trowel finish] [and] [to be covered <br />with fluid-appliEd or sheet waterproofIng, built-up or membrane roofIng, or sand- <br />bed terrazzo] <IlIlsert locations>. <br /> <br />D. Trowel Finish: After applying float fmish, apply fIrst troweling and consolidate concrete by <br />hand or power-driven trowel. Continue troweling passes and restraighten until surface is free of <br />trowel marks and uniform in texture and appearance. Grind smooth any surface defects that <br />would telegraph through applied coatings or floor coverings. <br /> <br />1. Apply a trowel finish to surfaces [indicated] [exposed to view] [or] [to be covered with <br />resilient floorinl~, carpet, ceramic or quarry tile set over a cleavage membrane, <br />paint, or another thin-tilm-tinish coating system] <Insert locations>. <br />2. Finish and measure surface so gap at any point between concrete surface and an <br />unleveled, freestanding, 10-foot- (3.05-m-) long straightedge resting on 2 high spots and <br />placed anywhere on the surface does not exceed [1/4 inch (6 mm)] [3/16 inch (4.8 mm)] <br />[1/8 inch (3.2 mm)] <br /> <br />E. Trowel and Fine-Broom Finish: Apply a first trowel fmish to surfaces [indicated] [where <br />ceramic or quarry til'e is to be installed by either thickset or thin-set method]. While <br />concrete is still plastic, Blightly scarify surface with a fine broom. <br /> <br />1. Comply with flatness and levelness tolerances for trowel finished floor surfaces. <br /> <br />CAST -IN-PLACE CONCRETE <br /> <br />03300 - 8 <br />