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Award > Spalled Concrete Repair
Crack and Delaminated/Spalled Concrete Repair
Crack repair consisted of epoxy injection from
the soffit of the deck. Injection ports were typically installed
at 11" (275 mm) on center. Injection took place while the existing
deck coating was in place to assist in retaining the epoxy. After
the existing deck coating was removed, the remaining cracks were
repaired using a low-viscosity, gravity-flow epoxy applied from
the top of the deck. Spalls and delaminated concrete were edge cut
with diamond saws in accordance with ICRI guidelines and deteriorated
concrete was removed to sound substrate using 15lb. (7kg) chipping
hammers. The removed sections of deck were repaired using polymer-modified
concrete.
The existing elastomeric membrane was removed
using rotary carbide strippers. The concrete was then shotblasted
to provide the proper profile in accordance with the manufacturer's
requirements. After the completion of the crack, spall, and joint
repairs and the CFRP installation, the elastomeric deck coating
was placed. The coating system consisted of a primer, a has coat,
two intermediate coats, and a topcoat, comprising approximately
70 mils (1800 micrometers).
Quality control of all work was monitored by
the owner's representative on site. In-situ and laboratory testing
was conducted on the various elements of the repair project to ensure
compliance with the specifications.
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