526.01
Description
526.02
Materials
526.03 Forming
and Placing Reinforcing Steel
526.04 Placing
and Sampling Concrete
526.05
Finishing and Curing
526.06 Side
Curbs
526.07 Method
of Measurement
526.08 Basis of
Payment
526.01
Description.
This
work consists of constructing reinforced portland
cement concrete approach slabs for bridges on the completed and accepted
subgrade or subbase.
526.02 Materials.
Furnish
materials conforming to:
Concrete, Class QC
2*................................................. 499
Epoxy coated reinforcing
steel.................... 509.02, 709.00
Preformed joint
filler................................................ 705.03
Joint
sealer............................................... 705.04 or 705.11
*
Use the same class of concrete used in the bridges superstructure that the
approach slab is attached to unless otherwise shown in the plans. If the
super-structure concrete class for the bridge is not identified in the plans
use Class QC 2.
526.03 Forming, Furnishing and
Placing Reinforcing Steel. Furnish true and
straight steel or wooden side forms. Securely brace and hold forms to the
line and grade shown on the plans. Do not allow forms to vary more than
1/8 inch (3 mm) from a 10-foot (3 m) straightedge. Do not remove
forms for a minimum of 36 hours. Clean and oil forms after each use.
Furnish
reinforcing steel and place it in the position shown on the standard
construction drawing and firmly secure the steel during placing and setting of
the concrete. Tie reinforcing bars at all intersections, except tie
reinforcing bars at alternate intersections where bar spacing is less than 1
foot (0.3 m) in any direction.
526.04 Placing and Sampling
Concrete. Immediately
before placing concrete according to Item 511.07,
thoroughly moisten the subgrade or subbase with water
in the amount and manner directed by the Engineer. The Engineer will make at
least one set of test cylinders for each 50 cubic yards (35 cubic meters) of
concrete.
526.05 Finishing and Curing. If the
approach slab is to serve as a base for an asphalt concrete wearing course, finish
and texture the approach slab according to Item 305.
If the approach slab is to serve as a wearing surface finish and test the
surface according to 451.12 and diamond
groove the surface according to 511.17. Cure
approach slabs according to 511.14.A, deck
superstructure concrete.
Open
approach slabs to traffic according to Table
511.14-1A or Table 511.14B.
526.06 Side Curbs.
If
concrete curb extends across the approach slab, construct side curbs of the
dimensions required, and place the concrete curb at the same time as the
approach slab. Finish the curb according to Item 609.
526.07 Method of Measurement.
The
Department will measure Reinforced Concrete Approach Slabs by the number of
square yards (square meters) complete in place.
526.08 Basis of Payment. The Department will pay for accepted
quantities at the contract price as follows which includes all concrete, curbs,
reinforcing steel, dowels, joints and other materials:
Item
Unit
Description
526
Square
Yard
Reinforced Concrete Approach Slabs
(Square Meter)