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DocuSign Envelope ID:D561B1AE-DF34-4907-AD06-AOEB37BBE427 <br /> CHAPEL HILL ORANGE COUNTY VISITORS BUREAU August 12,2020 <br /> 308 WEST FRANKLIN,CHAPEL HILL,NC <br /> 3.6 CONCRETE PLACEMENT <br /> A. Comply with ACI 301 (ACI 301M)for placing concrete. <br /> B. Before test sampling and placing concrete, water may be added at Project site, subject to <br /> limitations of ACI 301 (ACI 301M). <br /> C. Do not add water to concrete during delivery, at Project site, or during placement. <br /> D. Consolidate concrete with mechanical vibrating equipment. <br /> 3.7 FINISHING FORMED SURFACES <br /> A. Rough-Formed Finish: As-cast concrete texture imparted by form-facing material with tie holes <br /> and defective areas repaired and patched. Remove fins and other projections exceeding 1/2 inch <br /> (13 mm). <br /> 1. Apply to concrete surfaces not exposed to public view. <br /> B. Smooth-Formed Finish: As-cast concrete texture imparted by form-facing material, arranged in <br /> an orderly and symmetrical manner with a minimum of seams. Repair and patch tie holes and <br /> defective areas. Remove fins and other projections exceeding 1/8 inch(3 mm). <br /> 1. Apply to concrete surfaces exposed to public view, or to be covered with a coating or <br /> covering material applied directly to concrete. <br /> C. Rubbed Finish: Apply the following rubbed finish, defined in ACI301 (ACI301M), to <br /> smooth-formed finished as-cast concrete where indicated: <br /> D. Related Unformed Surfaces: At tops of walls, horizontal offsets, and similar unformed surfaces <br /> adjacent to formed surfaces, strike off smooth and finish with a texture matching adjacent <br /> formed surfaces. Continue final surface treatment of formed surfaces uniformly across adjacent <br /> unformed surfaces,unless otherwise indicated. <br /> 3.8 FINISHING UNFORMED SURFACES <br /> A. General: Comply with ACI 302.1R for screeding, restraightening, and finishing operations for <br /> concrete surfaces. Do not wet concrete surfaces. <br /> B. Screed surfaces with a straightedge and strike off. Begin initial floating using bull floats or <br /> darbies to form a uniform and open-textured surface plane before excess moisture or bleedwater <br /> appears on surface. <br /> 1. Do not further disturb surfaces before starting finishing operations. <br /> C. Scratch Finish: Apply scratch finish to surfaces indicated and surfaces to receive concrete floor <br /> topping or mortar setting beds for ceramic or quarry tile, portland cement terrazzo, and other <br /> bonded cementitious floor finishes,unless otherwise indicated. <br /> MISCELLANEOUS CAST-IN-PLACE CONCRETE 033053 - 6 <br />