Definition - What does Gunite mean?

Gunite refers to an artificial mixture of cement, water and sand that is applied to a mold to produce a dense hard protective layer. Gunite is used to line tunnels and structures and for construction applications, such as sealing cracks, fissures and areas that could be sources of leaks and/or structural instability.

Gunite may also be known as shotcrete.

Corrosionpedia explains Gunite

Gunite was invented in 1910 when a double chamber “cement gun” was developed based on Carl Akeley’s design and introduced to the construction industry as a method to rectify deteriorated concrete. In the 1900s plaster was typically used for such applications; however, this new unique substance composed of cement and sand mortar began being used instead. The results were better and resulted in the granting of a proprietary patent.

Some key advantages that gunite has over regular concrete:

  • Better adherence to surfaces
  • Lower water-cementitious material ratio
  • Compatibility with steel fiber
  • Better flexural strength, ductility and toughness
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