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Polyurethane foam is an injectable polyol and isocyanate resin sealant, insulation, grout which expands upon application providing void fill, structural support, and re-leveling properties.
The most common application is the injection of polyurethane in the air gap of façades: with only a few holes, polyurethane foam is injected into the air gap and it expands reaching every corner, so that the wall is perfectly insulated and repaired.
24 paź 2024 · Traditional repair methods involving demolition and reconstruction lead to extended closures and high costs. This study explores the polyurethane (PU) foam injection technique as an alternative solution, which can reduce both repair time and costs.
Injection is a common method used to repair and waterproof concrete structures. It is also used to consolidate and stabilize ground before future structures are erected (pre-excavation grouting) and to stop water and consolidate ground in existing underground structures (post-injection).
Injection is a procedure of pumping cement-based, polyurethane-based, epoxy-based or special acrylate-based systems into damaged or cracked structures to securely seal leaks, repair compromised structures and make them watertight for the long term. Injections Are a Good Choice Because They...
Polyurethane (PU) foam injection resins are designed to expand by foaming with or without water, in this way they can be injected as a liquid that then foams and expands to fill voids and smaller cavities in rock-structures or loose ground.
Polyurethane foam is a very effective thermal insulation, so it is essential to improve the energy efficiency of buildings. Its application in situ by spray or injection allows very versatile solutions, which adapt to all types of needs and construction elements, whether in new construction or rehabilitation.
