Providing Water proofing works in Terrace of Chromepet Telephone Exchange building, Chennai

Amount

Taking out the Plumbing pipe line , earth strip etc.by removing its clamp to facilitate terrace cleaning and other work and refixing the same after completion of terrace treatment work with required clamps all complete as directed by the Engineer-in-charge.

Chipping of unsound/weak concrete material from slabs, beams, columns etc. with manual Chisel and/ or by standard power driven percussion type or of approved make including tapering of all edges, making square shoulders of cavities including cleaning the exposed concrete surface and reinforcement with wire brushes etc. and disposal of debris for all lead and lifts all complete as per direction of Engineer-In-Charge

25 mm average thickness

Dismantling old plaster or skirting raking out joints and cleaning the surface for plaster including disposal of rubbish to the dumping ground within 50 metres lead.

20 mm cement plaster of mix :

1:6 (1 cement: 6 fine sand)

Cleaning Terrace floor slab including removal off bitumen felt sheet and its residue, loose bitumen paint, dirt etc. using BLOW TORCH or SAND MACHINE and washing the slab using high speed water jet to remove off dirt all complete as directed by the E-in-C.

Applying CICO TAPECRETE P-151 (or approved equivalent) polymer mixed with neat fresh cement in the ratio of 1:2 by weight applied by brush on prepared surface two coats with an interval of 6 hours between the coats, moist curing shall be done after 24 hours. The coating shall be applied as per the manufacturer specifications and the direction of Engineer in charge.

Providing, mixing and applying SBR polymer (of approved make @ minimum 2% by wt. of cement used) modified plain/reinforced cement concrete for structural members having minimum characteristic compressive strength [with ordinary portland cement, coarse sand and graded stone aggregate of 10mm maximum size in proportion as per design criteria] with specified average thickness.

a)50mm thick in Grade M 25 with cement content not less than 330 kg per cum

Disposal of building rubbish / malba / similar unserviceable, dismantled or waste materials by mechanical means, including loading, transporting, unloading to approved municipal dumping ground or as approved by Engineer-in-charge, beyond 50 m initial lead, for all leads including all lifts involved.