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ST. BARBARA CATHOLIC SCHOOL TASK 2 75-24272-01 <br />DIOCESE OF ORANGE SEPTEMBER 12TH, 2024 <br />SANTA ANA, CA BID & PERMIT SET <br /> <br />CONCRETE PAVING 321313 - 11 <br />3. Fog spray forms, reinforcing steel, and subgrade just before placing concrete. Keep <br />subgrade moisture uniform without standing water, soft spots, or dry areas. <br /> <br />3.6 CONCRETE FINISHING <br /> <br />A. Float Finish: Begin floating when bleed water sheen has disappeared, and the concrete surface <br />has stiffened sufficiently to permit operations. Float surface with power-driven floats, or by <br />hand-floating if area is small or inaccessible to power units. Finish surfaces to true planes <br />within a tolerance of 1/4 inch in 10 feet as determined by a 10-foot-long straightedge placed <br />anywhere on the surface in any direction. Cut down high spots and fill low spots. Refloat <br />surface immediately to a uniform granular texture. <br />1. Burlap Finish: Drag a seamless strip of damp burlap across concrete, perpendicular to <br />line of traffic, to provide a uniform gritty texture finish. <br />2. Medium-to-Fine-Textured Broom Finish: Draw a soft bristle broom across concrete <br />surface perpendicular to line of traffic to provide a uniform fine line texture finish. <br />3. Medium-to-Coarse-Textured Broom Finish: Provide a coarse finish by striating surface <br />1/16 inch to 1/8 inch deep with a stiff-bristled broom, perpendicular to line of traffic. <br />4. Do not use troweling machines within 12 inches of electrical junction and outlet boxes <br />which are set to finish flush with concrete slabs. Float and trowel such areas by hand <br />with wood floats and steel trowels, taking care to see that concrete is finished flush with <br />box cover and matches adjacent surfaces. <br /> <br />B. Slip-Resistant Aggregate Finish: Before final floating, spread slip-resistive aggregate finish on <br />pavement surface in accordance with manufacture’s written instructions <br /> 1. Cure concrete with curing compound recommended by slip-resistive aggregate <br /> manufacturer. Apply curing compound immediately after final finishing. <br /> 2. After curing, lightly work surface with a steel wire brush or abrasive stone and water to <br />expose non-slip aggregate <br /> <br />C. Finishing formed surfaces: <br />1. Curb forms shall leave a smooth face. <br />2. Remove all fins. <br /> <br />D. Provide steel trowel finish on tops of curbs and flow lines of curbs, gutters and integral curb <br />and gutters. <br /> <br />E. Final Tooling: Tool edges of paving, gutters, curbs, and joints formed in fresh concrete with a <br />jointing tool to the following radius. Repeat tooling of edges and joints after applying surface <br />finishes. Eliminate tool marks on concrete surfaces. <br />1. Radius: 1/4 inch. <br />2. Radius: 3/8 inch. <br /> <br />F. Finish surfaces to produce a uniform appearance throughout area involved and throughout <br />adjacent areas with the same treatment. <br /> <br />G. Sandblast finish shall be consistent finish throughout and match approved mock-up. <br /> <br />H. Where concrete finishing occurs adjacent to finished metal or other surfaces, particularly <br />where serrated or indented surfaces occur, remove all traces of cement film before allowing to <br />harden. <br />