Boston, MA
Logan International Airport Terminal E
Scope/Solutions
The Terminal E Ticketing Concourse is an open space approximately 75 ft wide and 625 ft long. The floor structure is a lightweight slab on composite metal decking and includes a concrete overlay with an epoxy terrazzo floor surface. After the contractor placed the 4 in. thick overlay, they observed lifted slab edges, cracks, and hollow-sounding areas in some locations. The contractor retained SGH to investigate the problem and provide repair options.
Highlights of SGH’s work include the following:
- Evaluated the causes of the overlay problems using a fault tree analysis
- Recommended removal and replacement of the overlay due to the potential for reflective cracking of the terrazzo at the edges of repair areas
- Designed and specified the demolition of the original overlay and repair of demolition damage in the structural slab
- Designed the replacement overlay with special reinforcement details and a shrinkage-reducing admixture to avoid a recurrence of the problem
- Developed procedure briefs to assist the contractor with repairs of surface chips, shallow delaminations, and moderate and large size spalls in the structural slab.
- Visited the job site to identify spall areas in need of repair, to observe work progress, to evaluate conformance with repair procedures, and to resolve anomalous conditions
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Project Summary
2004
Completion Date
Solutions
Repair & Rehabilitation
Services
Structures
Markets
Infrastructure & Transportation
Client(s)
Modern Continental Construction
Specialized Capabilities
Repair & Strengthening | Temporary Construction
Key team members
Additional Projects
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Cornell University, Pedestrian Suspension Bridge
Cornell University sought to install cable net barrier systems on four university-owned bridges, including a pedestrian suspension bridge that spans over Fall Creek. SGH analyzed the existing suspension bridge structure and the effect of the cable net on the bridge.
Northeast
Tuskegee Airmen (formerly 100th Street) Bus Depot
The contractor attempted to repair the 280,000 sq ft of elevated decks and ramps, but subsequent cracking, including some through the previous repairs, raised concern about the service life of the depot. SGH investigated the cause of cracking in the concrete slabs.