Smithsonian National Air and Space Museum – The Challenge:
The Smithsonian National Air and Space Museum, located in the heart of DC, is the most visited museum in the country. Features of the museum include the world’s largest and most significant collection of aviation and space artifacts, encompassing all aspects of human flight, as well as related works of art and archival materials. It operates two landmark facilities that, together, welcome more than eight million visitors a year. It’s also home to the Center for Earth and Planetary Studies. With that much foot traffic over a span of four decades, it’s only natural the sidewalks have aged. The Smithsonian contacted JES due to over 2000 sq ft of public facing uneven, cracked sidewalk, which, if not repaired, would ultimately become a tripping hazard for their guests.
The Smithsonian National Air and Space Museum, located in the heart of DC, is the most visited museum in the country.
The Solution and Project Summary:
JES provided concrete lifting and concrete leveling solutions for The Smithsonian National Air and Space Museum. JES installed 209 lbs of PolyRenewal polyurethane injection with 9 ports used. PolyRenewal models PL250 and PL400 were applied to lift and level the concrete slabs in question to prevent tripping hazards and concerns. A penny-sized hole was drilled in the concrete slab as determined by Field Supervisors, Will Blake and Russ Nagel, and PolyRenewal polyurethane was injected beneath the slab to first compress, stabilize and secure the underlying soil beneath the failed concrete. Next, the PolyRenewal expanded and began to lift the concrete slab to its desired position. All control joints and cracks were sealed using NEXUS PRO joint sealant to prevent debris and moisture from penetrating underlying treatment.