Logan International Airport Terminal E
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
Repair & Rehabilitation
Infrastructure & Transportation
Modern Continental Construction
Repair & Strengthening | Temporary Construction
Key team members
Logan International Airport, I-90/Route 1A Interchange
SGH assisted several contractors that looked for assistance with understanding the complex system of reinforcement, post-tensioning ducts and anchorages, and conduits, as well as with concrete quality at a drilled shaft.
Lower Falls Pedestrian Bridge No. P40
The structure is a former railroad bridge spanning the Charles River near Newton Lower Falls. The Department of Conservation and Recreation (DCR) proposed to convert the abandoned railroad bridge to pedestrian use. SGH evaluated the existing bridge structure and developed a rehabilitation plan.