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PORTLAND CEMENT CONCRETE PAVEMENT

Portland cement concrete pavement shall conform to Section 40, “Portland Cement

Concrete Pavement”, of the State Specifications, and these Specifications.

Portland cement concrete pavement shall be constructed to the dimensions, lines and

grades shown on the Plans. Unless otherwise provided in the Special Provisions, the pavement

shall be constructed of Class “A” or "B" concrete, at the Contractor’s option, conforming to the

requirements of Section 50-5, “Portland Cement Concrete”, of these Specifications. Unless

otherwise specified in the Special Provisions, the portland cement used in the concrete shall be

Type II as described in said Section 50-5, “Portland Cement Concrete”.

Subgrade for concrete pavement shall be prepared as specified in Section 18-2.05,

“Subgrade Preparation”, of these Specifications. Subgrade shall be free of all loose or

deleterious material when concrete is placed thereon and shall be uniformly moist. Any excess

water on subgrade surface shall be removed prior to placing concrete, as directed by the

Side forms shall be furnished and installed in accordance with Section 24, “Side Forms and

Headers”, of these Specifications.

25-4 CONCRETE CUTTING

Where new concrete is to join existing concrete, the existing concrete shall be cut to a true

line to a minimum depth of one and one-half inches (1-1/2”) with a power driven abrasive type

25-5 EXPANSION JOINTS IN ALLEY PAVEMENT

An expansion joint shall be placed ten feet (10’) from each end of the work and every twenty

feet (20’) therefrom, and at other places shown or specified in the Contract. The expansion joint

material shall be not less than three-eighths-inch (3/8”) in thickness and shall conform to

Section 50-4, “Premoulded Expansion Joint Filler”, of these Specifications.

25-6 PLACING CONCRETE PAVEMENT

The Contractor shall make adequate advance arrangements to prevent delay in delivery and

placing of the concrete. An interval of more than forty-five (45) minutes between placing of any

two (2) consecutive batches or loads shall constitute cause for stopping paving operations, and

the Contractor shall make a contact joint, in the concrete already placed, at the location and of

the type directed by the Agency. Such contact joint shall be made at the Contractor’s expense.

Slip-form paving and finishing equipment shall be properly adjusted and in satisfactory

operating condition. Prior to placing concrete, the Contractor shall demonstrate proper

adjustment of all screeds and floats on slip-form pavers by measurements from grade stakes

driven to known elevations. Satisfactory operation and adjustment of all propulsion and control

equipment, including pre-erected grade and alignment lines, shall be demonstrated by moving