Why is grout used in offshore platform repair?

Grout is used in offshore platform repair primarily to provide structural support, fill voids, and protect against corrosion, particularly in underwater or inaccessible areas. Grout is a cementitious material that can be pumped into place to fill gaps and provide a solid, load-bearing connection between structural elements. In offshore platform repair, grout is commonly used to repair damaged or deteriorated concrete structures, such as pile jackets, caissons, and splash zone areas. It is also used to fill voids between steel members and concrete, providing additional support and preventing water ingress. Grout provides corrosion protection by creating a barrier between the steel and the seawater, reducing the risk of corrosion. Grout is also used to strengthen and stabilize seabed foundations. Specialized grouts are designed to be pumpable over long distances, set quickly underwater, and resist the harsh marine environment. For example, grout can be injected into the annular space between a pile and a pile sleeve to strengthen the connection and provide corrosion protection. It can also be used to repair cracks and spalls in concrete structures, restoring their structural integrity.