After Superstorm Sandy in 2012, much of New York University Langone Medical Center’s (NYULMC) lower infrastructure was flooded. In response, NYULMC has been taking great measures to protect against future events with a variety of flood control measures, including waterproof doors and mechanical flood prevention systems that spring into action when flooding occurs. Even with these solutions, the lowest levels of the building remained vulnerable to water ingress during high water events because a sudden increase in water pressure can push water through weak points in the concrete. The foundation elevations are lower than the adjacent East River and tidally influenced, and had been prone to flooding during heavy storms in the past. To protect against future flooding, Kryton’s leak repair and waterproofing systems were used to waterproof the existing foundation at its lowest levels.
Gregory Maugeri of Dry Concrete LLC has been working with Langan Engineers in New York City for several years on the design and use of crystalline products to protect the facilities’ lower levels. The Dry Concrete team took the lead on the repairs, first leaking cracks were fixed with Krystol Plug and Krystol Repair Grout, and non-leaking cracks were chiseled out and repaired with Krystol Repair Grout to guard against future leakage. Once the cracks were addressed, the full slab and wall area was coated with Krystol T1 & T2 to waterproof the surrounding concrete. Some sections of the concrete where in poor condition, so the concrete in these areas was removed and replaced with new concrete treated with Krystol Internal Membrane (KIM) integral waterproofing admixture. Dry Concrete provided waterproofing systems to ensure a watertight joint between the old and new concrete. With the waterproofing repairs complete, the foundation was finished by pouring a self-leveling topping to provide a smooth and level floor surface. This is the third such project using Kryton solutions for NYULMC. NYULMC has been working with Dry Concrete and other groups, to fortify and protect concrete infrastructure in the wake of these events.
Krystol Internal Membrane (KIM) is a hydrophilic crystalline admixture used to create permanently waterproof concrete.
Krystol T2 is a surface-applied crystalline slurry treatment that transforms new or existing concrete into a permanent waterproofing barrier.
As part of the Krystol Leak Repair System, Krystol Repair Grout is a crystalline concrete waterproofing product that stops the flow of water to permanently repair leaking cracks, holes and joints in concrete, and can also be used to resurface and waterproof defective, damaged or deteriorating concrete. The grout employs advanced fiber technology and shrinkage controlling additives to prevent cracking.