Urgent retrofitting work to the damaged column at 110 22KV Thethampakkam Sub Station, Mannadipet Commune, Electricity Department, Puducherry.

Amount

Earth work in excavation by mechanical means (Hydraulic excavation) / manual means over areas (exceeding 30 cm in depth, 1.5m in width as well as 10sqm on plan) including getting out and disposal of excavated earth, lead upto 50m and lift upto 1.5m - all kinds of soil

Providing two legged scaffolding using 15 cm diameter blue - gum posts or casurina posts or best quality bamboo - posts of 4m over all length (3.0m height + 0.5 m projection + 0.5 into the ground) the distance between the two rows being 1.25 m and the spacing of posts with 0.5 m overlap on either side and braces to step up and providing a platform with country wood planks of 40mm thick and 1m width etc in a complete form using coir and nails 1 m run (Rate of scaffolding for a height of 3 m and lenghth of 1 m)

Exta for Providing two legged scaffolding for every additional height of 2.5 m (Rate for scaffolding for a height of 3 m and length of 1m)

Chipping the worn out wall and concrete portion using proper tools and removing the loose particles and preparing the surface for treatment with wire brush etc., complete until to reach good surface and removing the debris and disposal of the debris as directed by the Engineer-in-charge with all leads and lifts etc., complete.

Removing the loose particles/rust/mill scale deposits completely duly cleaning it with wire brush/crush sheet etc., and removing the dust over the old concrete surface and providing and system based aromatic Rust remover of CERA / SIKA / FOSEOC / MC Bauchmie / DON / BASF or Equivalent make certified and tested by accredited insitituions (confirming to IS: 9077 - 1979 (reaffirmed - 1997) Appendix B, Clause 5.3.3) including all tools complete as per manufacturers specification and as directed by at the Engineer-in-Charge.

Applying a polymer based anticorrosive coating material of CERA / SIKA / FOSROC / MC Bauchmie / DON / BASF or Equivalent make certified and tested by accredited institutions mixing mechanically until it is homogenous and applying the same as one rich coat on prepared steel surface with brush with all lead and lift etc., complete and as directed by the Engineer-in-charge.

Epoxy bonding of new concrete to old concrete

Centering and shuttering including strutting , propping etc and removal of form for - Columns , Pillars , Piers , Abutments , Posts and Struts

Providing high strength Non shrink free flow micro concrete of CERA / SIKA / FOSROC / MC Bauchmie / DON/BASF or equivalent make certified and tested by accredited instituions like IIT / SERC/ NTH or so (confirming to ASTM C 109 7cm cube of compressive strength 45-50 MPa, Physical properties: Tensile Strength - 2.0 N/Sqm @ 28 days (BS 4551-80), Flexural strength - 5.0 N/Sqm @ 28 days) over the Epoxy bonding agent applied area on columns, slabs, beams etc., upto floor five level (aggregates of 6mm to 12mm chips may be added) (Measurement has to be taken considering 60mm average thickness of prepared surface). For this treatment precise Quantity of water i.e., 0.15 W/P ratio will be maintained for good mortar consistency as per the manufacturers specification with all lead and lift etc., complete and as directed by the Engineer-in -charge (Note: Shuttering and reinforcement wherever required shall be paid separately)

Providing high strength Non shrink free flow micro concrete of CERA / SIKA / FOSROC / MC Bauchmie / DON/BASF or equivalent make certified and tested by accedited instituions like IIT / SERC/ NTH or so (confirming to ASTM C 109 7cm cube for compressive strength 45-50 MPa, Physical properties: Tensile Strength - 2.0 N/Sqm @ 28 days (BS 4551-80), Flexural strength - 5.0 N/Sqm @ 28 days) over the Epoxy bonding agent applied area on columns, slabs, beams etc., upto floor five level (aggregates of 6mm to 12mm chips may be added) (Measurement has to be taken considering 15mm thickness of repaired surface). For this treatment precise Quantity of water i.e., 0.15 W/P ratio will be maintained for good mortar consistency as per the manufacturers specification with all lead and lift etc., complete and as directed by the Engineer-in -charge including cement plaster.

Providing one coat of petro resin based curing compound of CERA / SIKA / FOSROC / MC Bauchmie / DON / BASF or Equivalent make certified and tested by accredited instituions (confirming to ASTM 309 - 99 & ASTM C15699 (A) over the finishing surface immediately after the shuttering of the concrete surface or final trowelling of plastered surface with all lead and lift etc., complete and as directed by the Engineer-in-charge.

Finishing walls with water proofing cement paint of required shade - old work (one or more coats applied @2.20 kg/10sqm) over priming coat of primer applied @0.8 litres / 10 sqm complete including cost of priming coat.