Repairs to the structural components of WQ 1,2,3 Berths, Kerb Walls and Drains in the backup area

Working plat Form: The working platform above the water level shall be erected using the friction support from adjacent two piles and hanging support from the top of the deck. The above fixing and erection work shall be carried out with the help of floating pontoon and boats etc. Providing, erecting and dismantling safe scaffolding including working platform for external and internal area to facilitate all works with proper arrangements etc. complete. The cost of equipment, plants, materials, sand, instrumentation, hiring of boat, catamaran, pontoon,labour and survey,fuel etc.., as required and as directed by the Engineer-in-charge complete. All labour and materials.

Surface Preparation: Labour charges for chipping the spalled and old concrete of the RC Structural Element. Check for the phenolphthalein test and if there is no change in color, chip the same further down until, reaching the good or uncontaminated concrete. Clean the surface and make sure that surface is clean and free from loose particles. The rate shall include cost of equipment, plants, instrumentation, hiring of boat, catamaran, pontoon, labour and survey, fuel etc. Engineer-in-charge complete. All labour and materials.

Shear Connectors: Drilling 12mm diameter holes up to a depth of 75mm maximum and fixing 8mm diameter L- shaped anchor rods as shear connectors at every 500mm c/c on the surfaces of the Pile or any other structural member, as the case may be. Clean the same using water and make sure that there are no fine particles present in the hole. Mix the base and hardener of the polyester resin, like Lokfix S/P manufactured by Fosroc or equivalent, thoroughly with the spatula. 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 into the hole and finish the excess resin which comes out of the hole, and allow the shear connectors not to be disturbed for a minimum of 20 minutes -complete. The cost of equipment, plants, materials, sand, instrumentation, hiring of boat, catamaran, pontoon,labour and survey,fuel etc.., as required and as directed by the Engineer-in-charge complete. All labour and materials.

Provision of Galvanic Anode: Before installation of the self-sacrificial anode Galvashield XPI manufactured by Vector Technologies or equivalent, 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 or equivalent 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 substrata 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 mintues prior to the application of the repair mortar. Tighten tie wires using the 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 like an electrical multimeter should be used. The rate shall include the cost of equpiment, plants, materials, instrumentation, hiring of boat,catamaran,ponoon,labour and survey,fuel etc.., as required and as directed by the Engineer-in-charge complete.All labour and materials.

Anti-corrosive Coating: Clean the rebars using the rust remover if there exists any rust, otherwise clean the rebar free of foregin material followed by Clean reinforcement using Reebaklens RR of Fosroc or equivalent; otherwise, clean the rebar free of foreign material. Mix the base and hardener of the anti- corrosive coating like Nitozinc Primer of Fosroc or equivalent, mechanically using a slow-speed, heavy-duty drilling machine fitted with a mixing paddle. Apply the mixed materials to the cleaned rebar at 45 microns/coat and total dry film thickness (DFT 90) microns in 2 coats and allow it to dry completely. The rate shall include the cost of equipment, plants, materials, instrumentation,hiring of boat ,catamaran,ponoon,labour and survey,fuel etc.., as required and as directed by the Engineer-in-charge complete.All labour and materials.

Formwork: Centring and shuttering, including strutting, propping, etc., as per the required line and length at all different floor levels as per the standard specification, is complete. Form work should be rigid to prevent loss of grout or mortar concrete from the concrete at all stages & appropriate to the methods of placing & compacting as per standard specification. It should be made of suitable material, i.e., timber, plywood, plastic, steel depending upon the type of finish specified. The rate shall include the cost of equpiment,plants,materials,sand,instrumentation,hiring of boat,catamaran,pontoon,labour and survey,fuel etc.., as required and as directed by the Engineer-in-charge complete.All labour and materials.

Micro- Concrete: Stock sufficient quantity of micro concrete (Renderoc-RG of Fosroc or equivalent) 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 a mixing paddle shall be used. Mix the micro concrete and the 12mm down grade chips in the ratio of 1:0.5 by weight with the required quantity of water as per the data sheet and place the same to the prefixed formwork. Remove the formwork after 24 hours in the case of RC Facia wall and RC Barriers and well Check for any surface defects, and if so, apply the polymer-modified mortar - complete. The cost of equpiment, interacting, drilling holes in deck slab, mixing, placing, making arrangements for supply micro concrete, labour, transport and fuel, cost hiring of boat,catamaran,pontoon etc.., as required and as directed by the Engineer-in-charge complete.All labour and materials

Curing Compound: Immediately after striking the form work or after completion of the repair works, the surface should be sprayed with 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 membrane - Complete. The rate shall include the cost of equipment, plants, materials, instrumentation,hiring of boat ,catamaran,ponoon,labour and survey,fuel etc.., as required and as directed by the Engineer-in-charge complete.All labour and materials.

Protective coatings for Environmental face using Dekguard S of Fosroc: Providing and applying a single component high build elastomeric, crack - bridging, resistant to CO2 and Chloride ion diffusion, UV resistant, breathable acrylic coating with elongation at break exceeding 200% using Dekguard S of Fosroc or equivalent material applied in two coats(Each coat 150 micron WFT) on acrylic based primer at an average thickness of 150 microns DFT in two coats including acrylic resin basedprimer as per recommendation of the manufacturers. The rate shall include the cost of equipment, plants, materials, instrumentation,hiring of boat ,catamaran,ponoon,labour and survey,fuel etc.., as required and as directed by the Engineer-in-charge complete.All labour and materials.

Demolishing R.C.C. work manually/ by mechanical means including stacking of steel bars and disposal of unserviceable material within 50 metres etc.., as required and as directed by the Engineer-in-charge complete.