Complete Compiled Specification.pdf - Peck Ormsby Construction

A. Rough Form Finish: For formed surfaces not exposed to view in the finish work.
1. Repair and patch tie holes and defective areas. Remove fins and other projections
exceeding 1/4".
B. Smooth Form Finish: For formed surfaces exposed to view.
1. This is as-cast concrete surface obtained with selected form facing material,
arranged orderly and symmetrically, with a minimum of seams. Repair and patch
defective areas with fins or other projections completely removed and smoothed.
C. Smooth Rubbed Finish: Provide smooth rubbed finish to exposed concrete surfaces, which
have received smooth form finish treatment, not later than one day after form removal.
Moisten concrete surfaces and rub with carborundum brick or other abrasive until a uniform
color and texture is produced. Do not apply cement grout other than that created by the
rubbing process.
3.10 MONOLITHIC SLAB FINISHES
A. Scratch Finish: Apply scratch finish to monolithic slab surfaces to receive concrete floor
topping or mortar setting beds for tile, portland cement terrazzo, and other bonded applied
cementitious finish flooring material, and as otherwise indicated.
1. After placing slabs, plane surface to tolerances for floor flatness (Ff) of 15 and floor
levelness (Fl) of 13. Slope surfaces uniformly to drains where required. After
leveling, roughen surface before final set with stiff brushes, brooms, or rakes.
B. Float Finish: Apply float finish to monolithic slab surfaces to receive trowel finish and other
finishes as follows:
1. Consolidate surface with power-driven floats or by hand-floating if area is small or
inaccessible to power units. Check and level surface plane to tolerances of
FF18-FL15. Cut down high spots and fill low spots. Uniformly slope surfaces to drain
as shown. Immediately after leveling, refloat surface to a uniform, smooth, granular
texture.
C. Trowel Finish: Apply trowel finish to monolithic slab surfaces to be exposed-to-view, and slab
surfaces to be covered with resilient flooring, carpet, ceramic tile, paint, or other thin-film
finish coating system.
1. Consolidate concrete surface with power driven triple paddle machine to produce a
hardburnished finish free of trowel marks, uniform in texture and appearance, and
with surface leveled to tolerance of FF20-FL17. Grind surface if necessary to
maintain tolerance and to remove surface defects that would telegraph through
applied floor covering system.
D. Trowel and Fine Broom Finish: Where ceramic tile is to be installed with thin-set mortar,
apply trowel finish as specified, then immediately follow with slightly scarifying surface by fine
brooming.
E. Nonslip Broom Finish: Apply broom finish to exterior concrete platforms, walks, ramps, and
elsewhere where indicated.
1. Immediately after float finishing, slightly roughen concrete surface by brooming with
fiber bristle broom perpendicular to main traffic route. Coordinate required final finish
with Architect before application.
3.11 CONCRETE CURING AND PROTECTION
A. General: Protect freshly placed concrete from premature drying and excessive cold or hot
SEGO LILY ELEMENTARY SCHOOL CLASSROOM ADDITION MARCH 2, 2009
CONCRETE WORK 03300 - 10