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Attendant Booth Additions 03 30 00 - 7 <br />Orange County, North Carolina AUGUST 2025 <br />TRC PN: 670493 <br /> <br />C. Rubbed Finish: Apply the following to smooth-formed-finished as-cast concrete <br />where indicated: <br />1. Smooth-Rubbed Finish: Not later than one day after form removal, <br />moisten concrete surfaces and rub with carborundum brick or another <br />abrasive until producing a uniform color and texture. Do not apply cement <br />grout other than that created by the rubbing process. <br />2. Grout-Cleaned Finish: Wet concrete surfaces and apply grout of a <br />consistency of thick paint to coat surfaces and fill small holes. Mix 1 part <br />portland cement to 1-1/2 parts fine sand with a 1:1 mixture of bonding <br />admixture and water. Add white portland cement in amounts determined <br />by trial patches, so color of dry grout matches adjacent surfaces. Scrub <br />grout into voids and remove excess grout. When grout whitens, rub <br />surface with clean burlap and keep surface damp by fog spray for at least <br />36 hours. <br />3. Cork-Floated Finish: Wet concrete surfaces and apply a stiff grout. Mix 1 <br />part portland cement and 1 part fine sand with a 1:1 mixture of bonding <br />agent and water. Add white portland cement in amounts determined by <br />trial patches, so color of dry grout matches adjacent surfaces. Compress <br />grout into voids by grinding surface. In a swirling motion, finish surface <br />with a cork float. <br />D. Related Unformed Surfaces: At tops of walls, horizontal offsets, and similar <br />unformed surfaces adjacent to formed surfaces, strike off smooth and finish <br />with a texture matching adjacent formed surfaces. Continue final surface <br />treatment of formed surfaces uniformly across adjacent unformed surfaces <br />unless otherwise indicated. <br />3.8 CONCRETE PROTECTING AND CURING <br />A. General: Protect freshly placed concrete from premature drying and excessive <br />cold or hot temperatures. Comply with ACI 306.1 for cold-weather protection <br />and ACI 301 for hot-weather protection during curing. <br />B. Evaporation Retarder: Apply evaporation retarder to unformed concrete <br />surfaces if hot, dry, or windy conditions cause moisture loss approaching 0.2 <br />lb/sq. ft. x h before and during finishing operations. Apply according to <br />manufacturer's written instructions after placing, screeding, and bull floating or <br />darbying concrete, but before float finishing. <br />C. Formed Surfaces: Cure formed concrete surfaces. If forms remain during curing <br />period, moist cure after loosening forms. If removing forms before end of curing <br />period, continue curing for remainder of curing period. <br />Docusign Envelope ID: 34F94CE0-2CE8-49C5-B7C4-6B696F8E23C3