Gunnite
Durability Guaranteed - Pulhamite Rockwork - Its conservation and repair, published by Historic England in 2008, defines gunnite as: ‘A sprayed-on mortar of Portland cement and sand (typically in a ratio of around 1:3) used for repair and finishing, usually of vertical surfaces. It is mixed dry and applied through a hose with water added at the nozzle, and is commonly used for tunnel linings, swimming pool walls, tanks, columns and other situations where poured concrete would be impractical. A minimum 20mm thickness is usually specified.’
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