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504001 PCC CRACK AND JOINT SEALING LESS THAN 3/4 -INCH WIDE LF

DE · 2025 Standard SpecificationsBook pages 171–173View official source ↗

PCC PATCHING, PARTIAL DEPTH SECTION 505 161 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 ex posed. 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. 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.In addition to the requirements in Section 503.3.7 and ASTM C -109, mix , place , and cure the patch

material in accordance with the manufacturer’s recommendations. 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. Use only rapid cured concrete that will reach a compressive strength of 2,000 -psi in 6-hours or less.

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. PCC PATCHING, PARTIAL DEPTH SECTION 505 162 505.4 Method 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

PIPE CULVERTS SECTION 601 163 DIVISION 600 — STRUCTURES

601.1Description.

This work consists of providing and placing pipe culverts, flared end sections, and connections to existing drainage inlets and manholes.

601.2Materials.

A.Reinforced Concrete Pipe Section 1031

B.Thermoplastic Pipe Section 1031

C.Flared End Section Section 1031

D.GABC Section 1005

E.PCC, Class A , B, or C Section 1022

F.Chemical Sealing Section 1047 .5

G.Mortar Section 1047.6

H.Liquid Membrane -Forming Compounds for Curing Section 1045.7

601.3Construction.

601.3.1 Preconstruction Inspection. The Department will review all existing pipes for use in the final drainage system and will discuss the system condition with the contractor before starting construction. 601.3.2 Excavation and Pipe Bedding.

A.Excavate the pipe trench and place bedding within the template of the item in accordance with

Section 207 and the Standard Construction Details. Class C bedding is to be used in accordance with the Standard Construction Details unless specified otherwise. When Class A bedding is specified, cure PCC with materials in accordance with Section 1022.6 . Remove unsuitable material encountered below the proposed pipe bedding and replace as directed by the engineer in accordance with Section 207.

B.When the contract calls for placing pipe in an embankment or fill area that has not been fully

constructed, create a fill area for the pipe a minimum width of 2 pipe diameters on each side of the pipe and 18 -inches over the top of the pipe. If the embankment finished elevation is less than 18-inches above the pipe, build the fill to the finished elevation. Once the fill area is created, trench for pipe placement. 601.3.3 Reinforced Concrete Pipe.

A.Joints

1.Before laying the pipe in the trench, attach the rubber gasket or joint sealant to the spigot end

of each pipe as follows:

Source: Delaware Standard Specifications for Road and Bridge Construction, 2025 Edition. Pages 171–173 of 779.

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50300 1 PATCHING PCC PAVEMENT, 6’ TO 15’, TYPE A SY

50500 0 PCC PATCHING, PARTIAL DEPTH SY-IN