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Last edited 08 Oct 2018
If a damp-proof membrane (DPM) is to be placed above it, the blinding will help prevent it from becoming damaged by the hardcore. If a damp-proof membrane is not being laid directly above the blinding, the blinding instead provides a sturdy surface on which reinforcement for a concrete floor or raft foundation can be positioned, it prevents the concrete from seeping down into the hardcore, and it reduces the amount of moisture penetrating up into the concrete.
The concrete used for blinding is weak compared with structural concrete, and can withstand lower loading. If necessary, steel mats can be used to reinforce either the entire blinding layer or the specific areas of high loading.
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