BLINDING CONCRETE

Objective

To define the Standard Procedure and arrangements for Lean

Concrete (1200 psi)

Scope

This work procedure covers the Lean Concrete activity to be placed on

a flat excavated surface (76.2mm to 152.4 mm thick) under floor slabs

and foundations of structures.

Procedure

Prior to the start of activity, design mix, material samples will be

submitted to Engineer for approval.

Ground surface is trimmed to level

Surface is compacted to required level using roller/plate compactors

& compaction requirements as specified in specs will be ensured

prior to Lean concreting

PCC will be laid on compacted surface, special care will be given to

maintain thickness, and surface of concrete will be leveled using

floats.

Blinding concrete will be allowed to set for 24 hours prior to

placement of fresh concrete.

Lean surface will be kept clean & free of loose material before

laying Reinforcing steel.