Blinding is a thin layer, usually around 50 mm (2 inches) thick, it is usually a weak concrete i.e Lower Grade of Concrete or sand that is laid above a layer of hardcore to provide a clean, level and dry working surface. Concrete Blinding is the most Common Form of Blinding.
Purposes of Blinding
 Blinding Help in Preventing of damp proof membrane DPM being Damaged by the Hardcore. Placing the DPM directly on the Hardcore instead of placing it on the Blinding will Damage the DPM.
 Blinding prevents the concrete from seeping down into the hardcore which lead to wastage of concrete.
 Blinding reduces the amount of moisture penetrating up into the concrete.
 The main Purpose of Blinding is to provides a clean, level and dry working surface.
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