SECTION 748
CURB AND GUTTER
748.01 DESCRIPTION
This work consists of constructing curb, gutter, or combination curb and gutter.
748.02 EQUIPMENT
Reserved
748.03 MATERIALS
Item
Concrete Class AE
Joint Materials
Expansion Joint Material
Reinforcing Steel
Section
802
826
826.02 C or 826.02 D
836
748.04 CONSTRUCTION REQUIREMENTS
A. Cast-in-Place Concrete Curb and Gutter
1. General
Construct curb and gutter using a slip-form machine or full depth fixed forms.
2. Mixing, Placing, and Finishing
Place curb and gutter concrete on a damp base. Consolidate the concrete by vibration.
Check the top and face of curbs with a 10 foot straightedge and correct all variations
greater than 1/4 inch in 10 feet before the final finish. Finish the exposed surfaces with a
moistened wood float and a stiff bristled broom.
Correct all honeycombed surfaces by using a mortar composed of one part cement and
two parts sand. Remove and replace severely honeycombed areas.
If honeycombed areas appear, the Engineer will determine if the areas can be repaired
or needs to be removed and replaced. If the Engineer directs repair, patch the
honeycombs using a mortar composed of one part cement and two parts sand.
Do not use brushes to apply water or use water to facilitate finishing.
3. Curing
Apply the final cure within 30 minutes of placing the concrete. Cure all surfaces not
protected by forms with a wetted fabric cure or an impervious membrane cure. Changes
in curing method require the Engineer’s approval.
Cure concrete pavement for a period of at least 72 hours.
If weather conditions cause rapid drying of the pavement surface, apply a fine mist or fog
spray to the concrete surface for interim curing. Do not apply water with brushes.
B. Precast Concrete Curbing
1. Joints
All joints shall be formed according to the Plans or as otherwise directed.
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2. Backfill
After the curb has been set to line and grade, fill the spaces in front and back of the
curbing and compact to the required elevation.
C. Bituminous Curbing
1. Excavation
Perform excavation according to Section 748.03 A.2.
2. Base
After the uniformly compacting the base, apply a prime coat of the type, grade, and
quantity specified.
3. Base Preparation
Remove all deleterious materials. Thoroughly dry the surface. Place curb and gutter on
a dry surface. Apply the specified tack coat before placing the bituminous mixture. The
Engineer may approve the elimination of the tack coat if the base has been freshly
primed.
4. Placing
Construct bituminous curbing to the required cross section and to a uniform texture,
shape, and density.
5. Painting and Sealing
Perform sealing and painting only on curbing that is clean and dry, and only under
conditions approved by the Engineer.
6. Backfill
Fill and compact the spaces in front and back of the curbing to the required elevation
with suitable material.
748.05 METHOD OF MEASUREMENT
The Engineer will measure completed and in place as specified in Section 109.01
“Measurement of Quantities” and as follows:
The Engineer will measure along the front face of the curb and continuously through drainage
structures and areas of dropped curb for driveways.
748.06 BASIS OF PAYMENT
Pay Item
Curb and Gutter Type __
Curb Type __
Valley Gutter Type __
Pay Unit
Linear Foot
Linear Foot
Linear Foot or Square Yard
Such payment is full compensation for furnishing all materials, equipment, labor, and incidentals
to complete the work as specified.
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Changes noted in
Section 748 Curb and Gutter
748.03 MATERIALS
 2008 Spec Items Removed:
o Materials for Bituminous Curbing
o Curing Materials
o Base Materials
408
810
816
748.04 CONSTRUCTION REQUIREMENTS
 A. Cast-in-Place Concrete Curb and Gutter
o 2008 Spec Items Removed:
 “2. Excavation…… with suitable material.”
 “3. Base……section and uniformly compacted.”
 “6. Joints and Joint Sealing ….. Shall be as specified.”
 “8. Backfill ….. elevation with suitable material.”
 “9. Operational Limits ….. meet Section 602.03.G.”
o New Spec Items Added:
 “1. General
Construct curb and gutter using a slip-form machine or full
depth forms.”
 2. Mixing, Placing, and Finishing
3rd paragraph 1st sentence - “If honeycombed areas appear,
the Engineer will determine if the areas can be repaired or
needs to be removed and replaced.”
 3. Curing
1st paragraph, 1st sentence - “Apply the final cure within 30
minutes of placing the concrete.”
1st paragraph, last sentence – “Changes in curing method
require the Engineer’s approval.”
 B. Precast Concrete Curbing
o We should recommend this section be deleted, unless someone has used
precast concrete curbing or knows of someone using it in the past 30
years.
 C. Bituminous Curbing
o We should recommend this section be deleted, unless someone has used
bituminous curbing or knows of someone using it in the past 30 years
748.05 METHOD OF MEASUREMENT
 2008 Spec Items Removed:
o “B. Reinforcing Steel and Dowel Bars. These items will not be measured
for payment but shall be included in the unit price for curb.”
o “C. Base Materials. This item will be measured by the Ton or by the
Cubic Yard according to Section 109.”
 New Spec Items Added: `
o “The Engineer will measure completed and in place as specified in
Section 109.01 “Measurement of Quantities” and as follows:”
748.06 BASIS OF PAYMENT
 2008 Spec Items Removed:
o “Gutter Type _____
Linear Foot”
o “Base Material _____
Linear Foot”
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“Curb and Gutter Type I Reinforced
Linear Foot”
“Curb and Gutter Type II
Each”
1st sentence below Pay Item list – “Excavation costs shall be included in
the price bed for Curb, or Curb and Gutter.”
New Spec Items Added:
o “Valley Gutter Type _____
Linear Foot or Square Yard”
o
o
o

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