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, <br /> ' <br /> veneer piaster, painting, or another similar system. This is an as-cast concrete surface <br /> obtained with selected form-facing material, arranged in an orderly and symmetrical <br /> manner with a minimum of seams or as shown. Repair and patch defective areas wi#h fins ' <br /> and other projections completely removed and smoothed. <br /> 3:8 MONOLITHIC SLAB FINISHES � <br /> , A. Float Finish: Apply float finish to monolithic slab surfaces to receive trowel finish and <br /> other finishes as specified; slab surfaces to be covered with membrane or elastic <br /> waterproofing,membrane or elastic roofing,or sand-bed terrazzo;and where indicated. , <br /> 1. After screeding, consolidating, and leveling concrete slabs, do not work surface <br /> until ready for floating. Begin floating, using float blades or float shoes only, ' <br /> when surface water has disappeared, or when concrete has stiffened sufficiently <br /> to permit operation of power-driven floats, or both. Consolidate surface with <br /> power-dreven floats or by hand-floating if area is smalI or inaccessible to power , <br /> units. Finish surfaces to tolerances of F(F} 18 (floor flatness) and F(L) 15 (floor <br /> levelness) measured according to ASTM E 1155. Cut down high spots and fll <br /> low spots. Uniformly slope surfaces to drains. rmmediately after leveling, <br /> refloat surface to a uniform, smooth,granuIar texture. ' <br /> B. After floating, begin first trowel-finish operation using a power-driven trowel. Begin <br /> � final troweling when surface produces a ringing sound as trowel is moved over surFace. ' <br /> Consolidate concrete surface by final hand-troweling operation, free of trowel marks, <br /> uniform in texture and appearance, and finish surfaces to toIerances of F(F) 20 (floor <br /> flatness) and F(L) ]7 (floor levelness) measured according to ASTM E 1155. Grind <br /> smooth any surFace defects that would telegraph through appfied floor coveriag system. , <br /> C. Trowel and Fine Broom Finish: Wttere ceramic or quarry tile is to be installed with thin- <br /> set mortar, apply a trowel fuush as specified, then immediately follow by stigiltly <br /> scarifying the surface with a fine broom. ' <br /> 3.9 MISCELLANEOUS CONCRETE TTEMS <br /> A. Filling In: Fill in holes and openings left in conerete structures for passage of work by ' <br /> other trades, unless otherwise shown or directed, after work of other trades is in place. <br /> Mix, place, and cure conerete as specified to blend with in-place construction. Provide ' <br /> o#her miscellaneous concrete filling shown or required to complete Work. <br /> B. Curbs: Provide monolithic finish to interior curbs by stripping forms while concrete is <br /> still green and by steel-troweling surfaces to a hard, dense finish with corners, ' <br /> intersections,and terminations slightly rounded. <br /> C. Equipmenrt Bases and Foundations: Provide machine and equipment bases and ' <br /> foundations as shown on dra.wings. Set anchor bolts for machines and equipment to <br /> template at correct elevations, complying with diagrams or templates of manufacturer <br /> furnishing machines and equipment. <br /> 3.10 CONCRETE CURING AND PROTECTION • I <br /> A. General: Protect freshiy placed concrete from premature drying and excessive cold or hot , <br /> temperatures. In hot, dry, and windy weather protect concrete from rapid moisture loss <br /> before and during finishing operations with an evaporation-control material. Apply <br /> according to manufacture�'s instructions after screeding and bull floating, but before <br /> power floating and troweling. ' <br /> B. Start initial curing as soon as free water has disappeared from concrete surface after <br /> placing and finishing. Weather perrnitting, keep continuously moist for not less than 7 t <br /> days. <br /> CONCRETE Page 6 of 8 <br />