Covering for reinforcement in concrete is very important.  The thickness of cover depends on environmental conditions and type of structural member. The correct cover shall be maintained by cement mortar cubes (blocks) or other approved means.Concrete cover for reinforcement in the site was as follows. (This may vary depending on the construction site)
Cover block used in slab
Cover block used in slab
Ground Beams
50mm Surface cast against ground
40mm Other face/on blinding
30mm Top face 40mm earth face
Ground Slabs
30mm Top face ;40mm earth face
Suspended Slabs
25mm Internal & external
Beams, Lintels & Capping beams
30mm Internal & external
Columns and Pedestals
30mm Surfaces cast against ground
30 mm Internal & external surfaces in contact with ground cast
against shutter
Walls
40mm Surfaces cast against ground
30mm Internal & external surfaces in contact with ground cast
against shutter

Cover blocks used in reinforcement

Cover block is  key part of the reinforcement work. It is used to maintain the cover between shuttering boards and the mesh of the reinforcement. In our site 1:2 mortars and binding wire was used for cover block. Cover block size 1.5″ x 1.5″ and thickness is depending on situation
Cover blocks used in floor reinforcement
Cover blocks used in floor reinforcement

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