SECTION 552 – PRESSURE INJECTION SEALING
552.01 Description
This Section describes the requirements for repairing cracks in concrete using pressure injection sealing.
552.02 Materials
552.02.01 Materials
Provide materials as specified: Epoxy Injection Material ................................ ................................ ................................ .............................. 919.11 Use an epoxy crack sealant recommended by the epoxy injection material manufacturer.
552.02.02 Equipment
Provide equipment as specified: Epoxy Resin Injection Equipment ................................ ................................ ................................ ................ 1005.07 Submit technical data sheets for the proposed core stopper drill or an equivalent drill to the RE for approval.
552.03 Construction
552.03.01 Pressure Injection Concrete Cracks
A.Crack Repair Survey. The RE will examine the structure to verify the repair limits shown on the Plans. At least 15 days before the start of crack repair, notify the RE in writing and make the work site available for this examination. The RE may increase or decrease the limits of repair based on the examination. The RE will schedule surveys during daylight hours unless the working time is restricted in the Contract.
B.Preparing for Repair. Remove deteriorated, damaged, and loose concrete from the crack area. Drill port holes at 3 foot intervals along the crack. Perform additional surface preparation requirements according to the epoxy manufacturer’s recommendations.
C.Sealing Surface Cracks. Seal the surface of the crack with an epoxy crack sealant. Ensure that this sealer does not obstruct the port holes for the pressure injected e poxy resin and is capable of containing the injected epoxy resin. Ensure that the sealant is hard before injecting the epoxy resin adhesive.
D.Injecting Epoxy Resin Adhesive. Mix and apply the epoxy resin adhesive according to the manufacturer’s recommendations and the following. Begin by injecting the lowest entry port and continue until the epoxy adhesive has reached the next port hole in the crack. Stop injection and immediat ely seal the port hole before moving the injection to the next port hole. Continue the operation by injecting the epoxy resin adhesive into the next port hole in the crack. Continue the operation until the crack is filled.
Referenced in this section
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Source: Standard Specifications for Road and Bridge Construction, 2019 (rev. 2022-12-21) Edition. Pages 303–303 of 651. View official source ↗