In construction, concrete cover is the thickness of concrete provided between the outer surface of a concrete member and the nearest surface of the embedded reinforcement (steel bars).
materials are:
Cement
Fine aggregate (sand)
Water
Sometimes admixtures for strength and durability
The cover block is placed between the reinforcement and the formwork to maintain the required concrete cover during casting.
Typical cover values (may vary by code and exposure conditions):
Slabs: 15–25 mm
Beams: 25–40 mm
Columns: 40 mm or more
Footings: 50–75 mm
The purposes of concrete cover are:
Protection of steel against corrosion.
Fire resistance.
Proper bond between concrete and reinforcement.
Durability of the structure.
materials are:
Cement
Fine aggregate (sand)
Water
Sometimes admixtures for strength and durability
The cover block is placed between the reinforcement and the formwork to maintain the required concrete cover during casting.
Typical cover values (may vary by code and exposure conditions):
Slabs: 15–25 mm
Beams: 25–40 mm
Columns: 40 mm or more
Footings: 50–75 mm
The purposes of concrete cover are:
Protection of steel against corrosion.
Fire resistance.
Proper bond between concrete and reinforcement.
Durability of the structure.
