MICRO CONCRETE WORK FOR COLUMN, BEAMS AND SLABS IN CHINNAKUMARAR MANDAPAM PORTION (UNDER GROUND) AT HILL TEMPLE

Dismantling, clearing away and carefully stacking materials useful for re-use for any thickness of walls for Reinforced Cement Concrete

Dismantling, clearing away and carefully stacking materials useful for re-use for any thickness of walls for Brick / stone masonry in Cement mortar walls under 3m high

Clean removal of Cement plaster from walls

Supplying, fabricating and placing in position Mild Steel / Ribbed Tor Steel grills for all RCC works as per design given including cost of steel and G.I. binding wire in all floors etc. complete complying with standard specification. (Contractor has to make his own arrangements for the supply of steel and binding wire).

Clean the rebars using the rust remover if there exists any rust, otherwise clean the rebar free of foreign material. Mix the base and hardener of the zinc rich epoxy resin mechanically using a slow speed heavy duty drilling machine fitted with mixing paddle. Apply the mixed materials to the cleaned rebar and allow it to dry complete.

Application of two component epoxy bonding agent Nitobond EP or equivalent after the surface has been completely prepared. Care shall be taken to achieve uniform application of the epoxy bonding agent over the prepared area.

Supplying and erecting centering for sides and soffits including necessary supports and strutting upto 3.29 M height for plane surfaces as detailed below in all floors with all cross bracings using Mild Steel sheets of size 90 x 60 cm and 10 BG stiffened with welded Mild Steel angle of size 25mm x 25mm x 3 mm for boarding laid over silver oak joists of size 10cm x 6.50 cm spaced at abote 90 cm centre to centre and supported by casurina props of 10cm to 13 cm dia spaced at not more than 75 cm centre to centre etc. complete complying with the standard specificaiton. (Payment for centering shall be given after the concrete is laid)

Micro Concreting for the damaged structural element like slab/beam/column by Stocking sufficient quantity of micro concrete and 12mm downgraded chips on site to enable the completion of the pouring in a continuous operation. An approved concrete mixer or a slow speed heavy duty drilling machine fitted with mixing paddle shall be used. Mix the micro concrete and the 12mm down grade chips in the ratio of 1: 0.5 (one part of Renderoc RG and 0.5 part 12mm down chip) by weight with required quantity of water powder ratio 0.16 and place the same to the prefixed formwork well before the epoxy jointing compound dries up. Remove the formwork after 24 hours in the case of columns and after a period of 72 hours in the case of slab and beam and check for any surface defects and if so apply the polymer modified mortar complete. The rate shall include the cost of all the operations and complete.

Where ever required, pre packed shrinkage controlled polymer modified fibre reinforced cementitious repair mortar Fosroc Renderoc SP 40 having tensile strength of 2.5 MPA @ 28 days and Compressive strength of >40 MPa @ 28 days with 70mm cubes shall be mixed with required amount of water as per manufacturer's specification and applied over the prepared surface area for an average thickness of 50mm. The application shall be done in layers of 20-25mm to achieve the desired thickness of 50mm. Note: If thickness is greater than 50mm, additional measurement shall be obtained for layers of 25mm.

Special Curing Immediately after completion of the repair works, the surface should be sprayed water once and followed by application of membrane based curing compound like Nitobond AR of Fosroc or equivalent diluted with water in the ratio of 1:1 as a curing.

Brick work in following Cement Mortar using best quality II class table moulded chamber burnt bricks of size 9" x 4-3/8" x 2-3/4" for foundation and basement including curing, etc., complete complying with standard specifiction.

Plastering with Cement Mortar 1:3 (One Cement and Three Plastering Sand) 20mm thick mixed with water proofing compound conforming to BIS at 2% by weight of cement used including finsihing, curing, etc., complete in all floors complying with standard specification and as directed by the departmental officers.

Plastering with Cement Mortar 1:5 (One cement and Five Plastering sand), 12mm thick in all floors including curing etc. complete complying with standard specification and as directed by the departmental officers.

Drilling 10mm diameter holes up to a depth of 60mm maximum and fix pre fabricated 8mm diameter L shaped anchor rods as shear connectors at where ever required on the surfaces of the slab or any other structural member as the case may be. Clean the same using water and make sure that there is no fine particle present in the hole. Mix the base and hardener of the polyester resin with the spatula thoroughly. Fill the drilled and cleaned holes to a minimum depth of 1/3rd of the hole with the prepared polyester resin.Make sure that the resin has reached till the end of the hole. At this stage push the shear connector gently in to the hole and finish the excess resin which comes out of the hole and allow the shear connector to be undisturbed for minimum 20 minutes - complete.

Making through holes in Plain or Reinforced Cement Concrete with Diamond Core Drilling System by using BOSCH power tools of 100mm dia diamete - 300mm Depth for pouring the micro concrete to the specified repair area on columns and slabs including all cost of materials,labour charges,transportation and all conveyance for hill area etc,complete.

All the areas which are under consideration for the repair & rehabilitation are to be provided with double legged scaffolding independent of the work having two sets of vertical supports. The supports shall be sound and strong, tied together with horizontal pieces over which scaffolding planks shall be fixed. Supply and fixing of scaffolding with bracing including cost of all material, all labour charges etc.,

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