slump, 13 mm 1/2 inch nominal maximum-size coarse aggregate, and shall be
proportioned to obtain required finishability. Materials shall meet the
requirements of paragraph MATERIALS. The base (bottom) course shall be
screeded and bull-floated. The bond-breaker shall consist of plastic
sheeting, felt paper, a bond-breaking compound or a sand cushion. The
topping shall be floated with a disc power float or equivalent, followed by
a minimum of two power trowelings. Trowel marks left by the machine shall
be removed by final, hard steel troweling by hand. The finished floor
shall be moist cured in accordance with paragraph CURING AND PROTECTION,
subparagraph MOIST CURING.]
3.4.2
Formed Surfaces
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NOTE: Consult the appropriate DM for information on
special architectural finishes. These finishes
should also be shown in drawings. Contact the
Division Office or CECW-EG for additional guidance
if the use of architectural finishes is extensive.
If any architectural finish is required other than
the normal texture imparted by the forms, the
optional sample panel in UFGS-03100A FORMWORK FOR
CONCRETE shall be required.
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Unless another finish is specified, surfaces shall be left with the texture
imparted by the forms except that defective surfaces shall be repaired as
described in paragraph FORMED SURFACE REPAIR. [Other finishes shall be
applied to the following structures or portions of structures:]
STRUCTURE OR PORTION
TYPES OF FINISH
OF STRUCTURE
[Grout-cleaned
[_____]]
[Textured
[_____]]
[Exposed aggregate
[_____]]
[Sand-blast
[_____]]
[Tooled
[_____]]
Unless painting of surfaces is required, uniform color of the concrete
shall be maintained by use of only one mixture without changes in materials
or proportions for any structure or portion of structure that is exposed to
view or on which a special finish is required. The form panels used to
produce the finish shall be orderly in arrangement, with joints between
panels planned in approved relation to openings, building corners, and
other architectural features. [The finished surface of sand-blasted,
textured, tooled, and exposed aggregate finishes shall duplicate the
preapproved sample panel. The sample panel shall be prepared in accordance
with Section 03100A STRUCTURAL CONCRETE FORMWORK.] Forms shall not be
reused if there is any evidence of surface wear or defects that would
impair the quality of the surface.
3.4.2.1
[Grout-Cleaned Finish
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NOTE: See the appropriate DM and EM 1110-2-2000 for
surfaces to receive a grout-cleaned finish. Be sure
this is shown in the drawings.
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SECTION 03301A
Page 38
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