MICRO CONCRETE WORK FOR SLAB PORTION IN CHINNAKUMARAR MANDAPAM NEAR TOILET NO.1 AT ARULMIGU DHANDAYUTHAPANI SAWMY THIRUKOVIL, PALANI.

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

Dismantling RCC by manual / by using deploying machineries

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. (Contractoe has to make his own arrangements for the supply of steel and binding wire).

Prior to installation of the Galvashield XPI units, check the continuity of the steel reinforcement. Any loss of continuity will require additional electrical connections or restoration of continuity by effective means. Select a location for the Galvashield XPI as close as practical to the edge of the repair zone. Galvashield XPI units should be positioned around/along the repair boundary. In addition to standard substrate preparation, the Galvashield XPI anode(s) shall be thoroughly pre-soaked in clean water for a minimum of 10 minutes and a maximum of 20 minutes, prior to the application of the repair mortar. Tighten tie wires using Galvashield Fixing Tool so that no free movement is possible, thus ensuring good electrical continuity. To test electrical continuity between tie wires and reinforcement bar a continuity meter should be used.

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 plane surfaces such as RCC Floor/Roof Beam, Lintels, Cantilever Beams, Bed Blocks etc.. with necessary supports and strutting upto 3.60m height in all floors with all cross bracings using MS Sheets made of 10 gauge thick welded with MS angle of Size 25mm x 25mm x 3mm for boarding laid over Steel adjustable Span of Size 2m x 2m(expandable upto 3.60m) and Silver Oak Joists of Size 10 x 5 cm spaced at 50cm to 60cm c/c and supported by Steel Adjustable Telescopic Props of Size 2m x 2m (expandable upto 3.60m) made with outer steel pipe with dia 50mm (3.60mm thick) and inner steel pipe with dia 40mm (2.90mm thick) Spaced at not more than 50 to 60cm c/c , etc complete complying with standard specifications. Steel adjustable span and Steel Adjustable telescopic props shall be provided as directed by the departmental Officers. (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.

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.

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.