CONCRETE FLATWORK
PART 1 GENERAL
1.1SECTION INCLUDES
A.Concrete flatwork items such as sidewalk, plowable end section, median
filler, curb, gutter, concrete lined ditch, and driveway.
1.2RELATED SECTIONS
A.Section 02056: Embankment, Borrow, and Backfill
B.Section 02721: Untreated Base Course (UTBC)
C.Section 03055: Portland Cement Concrete
D.Section 03152: Concrete Joint Control
E.Section 03211: Reinforcing Steel and Welded Wire
F.Section 03390: Concrete Curing
1.3REFERENCES
A.ASTM C 979: Pigments for Integrally Colored Concrete
1.4DEFINITIONS Not Used
1.5SUBMITTALS
A.1 ft2 sample of colored concrete representative of the color to the Engineer
for approval.
B.Manufacturer’s product data sheets and mixing instructions for concrete
colorant.
1.6ACCEPTANCE
A.Concrete flatwork may be accepted at a reduced price when the concrete
strength is below that specified.
1.Refer to Section 03055 for pay factor adjustment.
Concrete Flatwork
PART 2 PRODUCTS
2.1CONCRETE
A.Class AA(AE). Refer to Section 03055.
B.Colorant – High purity, chemically inert, unfading, and alkali-fast synthetic
pigment coloring material according to ASTM C 979.
2.2PREMOLDED JOINT FILLER
A.Refer to Section 03152.
2.3UNTREATED BASE COURSE
A.Refer to Section 02721.
2.4REINFORCING STEEL
A.Coated reinforcing steel. Refer to Section 03211.
PART 3 EXECUTION
3.1GENERAL
A.Construct as shown in GW Series Standard Drawings and the plans.
3.2PREPARATION
A.Construct subgrade to plan elevations. Refer to Section 02056.
B.Place and compact UTBC per Section 02721.
C.Forms
1.Use wood, metal, reinforced fiberglass, or plastic forms free of
warps or bends and of sufficient strength to prevent deflection during the placement of concrete.
a.Transition smoothly from curves to straight sections.
1) Keep forms in curves free of flat sections and sharp bends.
b.Anchor securely in place.
c.Clean the inside surface of all dirt, concrete, and foreign
material before concrete placement.
2.May use slip form machines.
Concrete Flatwork
D.Concrete flatwork coloring when required.
1.Match concrete color to the approved samples.
2.Thoroughly mix color pigment in the concrete before placing.
3.3PLACE AND FINISH CONCRETE
A.Dampen the subgrade just before concrete placement.
B.Hand methods of strike-off and consolidation are permitted.
C.Finish the surface smooth with a non-steel concrete finishing float.
1.Do not add water to the surface of the concrete.
2.Remove form marks and irregularities.
D.Round edges to a ½ inch radius.
E.Brush exposed surfaces to a transverse broom finish except as follows:
1.Provide a parallel broom finish for gutters.
3.4EXPANSION AND CONTRACTION JOINTS
A.Place joints perpendicular to the subgrade and as shown.
B.Contraction Joints
1.Space the joints 10 ft apart.
2.Use ⅛ inch to 3/16 inch thick steel plate templates.
a.Remove the templates as soon as the concrete initially sets.
3.Cut joint 1½ inch deep when using slip form method to place the
concrete.
C.Expansion Joints
1.Use ½ inch thick premolded expansion joint filler.
2.Place an expansion joint every 30 ft with the following exception not
to place:
a.Slip form method to place concrete.
b.Gutters.
3.Place joint filler between the sidewalk or median filler and the curb
or adjacent pavement, sidewalk, driveway pavement, or structure.
3.5CONCRETE CURING
A.Refer to Section 03390.
END OF SECTION Concrete Flatwork
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Source: Utah Standard Specifications for Road and Bridge Construction, 2026 Edition. Pages 595–597 of 1,331. View official source ↗