DelDOT Section 505: PCC Patching, Partial Depth

505.1Description.

This work consists of partial depth patching of PCC.

505.2Materials.

A.PCC Patching Material, Partial Depth Sections 1022 and 1023

B.Joint Sealants Section 1042.1.2.B

C.Wax-Based Bond Breaker with a Flash Point not less than 200 degrees F

505.3Construction.

Provide a flatwork technician with an ACI or NRMCA certification, or a certification from another program pre-approved by the Department, to supervise all concrete finishing work. Provide the flatwork certification to the engineer before placing concrete. 505.3.1 Preparation and Placement.

A.Saw cut to depth in accordance with the Standard Construction Details around the perimeter of

the patch area to provide a vertical face at the edge. Break and remove concrete within the patch area to a depth required until sound and clean concrete is exposed. Avoid fracturing the sound concrete below the patch and undercutting or spalling the patch boundaries during the concrete removal operation.

B.If a partial depth repair area abuts a working joint or crack that penetrates the full depth of the

slab, place an insert, styrofoam, wax-based bond breaker or other approved bond-breaking medium to maintain existing joint dimensions.

C.Air-blast clean the patch surface of the prepared concrete just before placement of the patch

material.

D.For pre-blended packaged cementitious material, mix, place, and cure the patch material in

accordance with the manufacturer’s recommendations. For material other than pre-blended packaged cementitious material, place and cure in accordance with Section 503. 505.3.2 Joints.

A.Ensure that joints in the existing concrete pavement remain transversely and longitudinally

unobstructed.

B.Install joints in accordance with the Standard Construction Details.

C.Clean and seal all joints with hot-poured sealant material after the specified strength has been

achieved, if no overlay is planned in accordance with Section 504. 505.3.3 Concrete Strength Requirements.

A.The contractor may open the patch area to traffic once the patch material reaches a compressive

strength equal to or greater than 2,000-psi.

B.If unfavorable ambient temperature is predicted that would prevent achieving the desired

strength in the desired timeframe, then reschedule the work, subject to the approval of the engineer.

505.4Method of Measurement.

The Department will consider the quantity placed and accepted, as measured in the field by the square yard and multiplied by the depth in inches, as the measurement.

505.5Basis of Payment.

A.The Department will pay for the accepted quantity of PCC patching at the contract unit price per

square yard per inch. Payment constitutes full compensation for:

1.Saw cutting;

2.removing existing deteriorated concrete;

3.cleaning and preparing the patch area;

4.forming and maintaining existing pavement joints;

5.providing, placing, and curing patch material; and

6.providing and placing hot-poured joint sealer.

B.The Department will not pay for patch areas constructed outside the limits marked in the field or

outside the limits approved by the engineer.

C.The Department will consider joint sawing, sealing, and maintenance of existing joints incidental

to this item and will make no separate payment for this work. ITEM DESCRIPTION UNIT 505000 PCC PATCHING, PARTIAL DEPTH SY-IN

Referenced in this section

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Source: Delaware Standard Specifications for Road and Bridge Construction, 2026 Edition. Pages 170–0 of 786. View official source ↗

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504 PCC CRACK AND JOINT SEALING

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505PCC PATCHING, PARTIAL DEPTH

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