REPAIRS TO RCC MEMBERS SUCH AS WALLS, COLUMNS, CEILING OF GALLERY OF FINGER JETTIES AT NAVAL DOCKYARD VISAKHAPATNAM UNDER GE (I) (DM) VISAKHAPATNAM

Amount

Demolition of RCC any description and in any position not otherwise specifically provided for including cutting of reinforcement as required to facilitate demolition including removal of debris outside Naval Dockyard premises complete all as specified and directed.

M&L mild steel TMT bars 10mm dia and over TMT bars cut to length, bent to shape required, including cranking, bending, spirally for hooking for columns, hooking ends and binding with and including mild steel wire (annealed) not less than 0.9 mm dia or securing with clips complete all as specified and directed.

Supply only welded steel wire fabric fixed to RCC wall/ceiling with necessary fixing arrangement weight exc 2 kg/sqm butt not exc 4 Kg/Sqm complete all as specified and directed.

M&L for preparation of exposed surfaces of rusted steel reinforcement of dia 10mm and above with metal wire brush, cleaning the rusted surfaces free from loose rust and application of rust remover cum passivator painted with brush to the rusted reinforcemnet @ 2.0-2.5Ltr /Sqm surface of steel reinforcement, (Fosroc-Reebaklens RR or make approved by GE) to the surface of existing reinforcement) and removing rust with flex after 24 hours of application of rust remover with the help of wire brush, sand paper and throughly washed with water with the help of pressure jet and allowing it to dry complete all as specified and directed. (Length of reinforcement steel bar shall be measured for payment complete)

M&L for providing shear connectors and anchoring : Drilling 12mm dia holes upto depth of 100mm and fix 10mm dia TMT bars L shaped anchor rods as shear connectors in defective concrete area of the slab, column, beams etc. 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 Fosroc Lokfix or techno commercially equivalent or make as approved by GE with the spatula thoroughly. Fill the drilled and cleaned holes to a minimum depth of 3/4th of the hole with the prepared polyester resin and the reinforced bar shall be inserted to full depth of hole and extra length of the reinforcement bar shall be bent into the concrete to maintain proper cover to the reinforcement. complete all as specified and directed.

M&L for fixing injection grouting nozzle of suitable size and for Injection grouting for structural cracks with low viscous epoxy resin Conbextra EP10M manufactured by M/s Fosroc chemicals or make approved by GE and grouting by injecting the same using an electrically operated pressure grouting Machines until the nipple refuses the grout or the grout come out of a nearby nipples. After grouting, all the nipples shall be cut and the surface shall be finished to match the nearly surface. All the Procedures to be carried out by Manufacturer detailed specifications complete all as specified and diected. Note : Conbextra EP 10 M or make approved by GE chemical can be measured and paid separately.

Supply only injection grouting material, low viscosity epoxy based grouting material Conbextra EP10 or make approved by GE complete all as specified and directed. Make : Fosroc or or make approved by GE.

M&L for laying cement based Micro-concrete, Rendroc RG 40 of Fosroc make or make as approved by GE, pre-packed single component, chloride free, sulphate free, non-shrink, free flow, self compacting, ready to use after mixing water in specified proportion of approved quality. Formwork shall be provided for placing micro concrete patch repair as required at site with steel jack system and steel props to support the form work in this application of high strength, dual shrinkage, compensated, micro concrete for placing in nominal thickness of more than 50mm for concrete repair with compresive strength of 40 Mpa at 28 days complete all as specified and directed. Note: The qouted rate deemed to be included for formwork / shuttering, if any required.

M&L for chipping & removal of existing damaged, cracked, spalled & loose portion of concrete of the RCC members completely till the reinforcement is exposed and sound concrete (20mm to 50mm) is observed by using mechanical means and manual chisels and further the surface is jetted with clean water for removal of dust and loose particles complete all as specified and directed.

M&L for application of bonding coat on the prepared old concrete surfaces of the RCC Members with two component epoxy based bonding agent Nitobond AR standard of Fosroc make or make approved by GE for the surfaces of the concrete to be rehabilated by Rendroc RG (above 50mm thick), Rendroc DS40 (upto 40mm thick), Rendroc SP 40 (upto 30mm thick), Rendroc S2 (upto 20mm thick ) or make approved by GE complete all as specified and directed.

M&L for application of polymer modified reinstatement mortar 20mm thick in isolated places of repair works of RCC members with Rendroc S2 of M/s Fosroc make or make approved by GE having a compressive strength of M40 grade complete all as specified and directed.

M&L for application of single component shrinkage controlled, polymer modified, fibre reinforced cementitious repair mortar (Renderoc SP40 of Fosroc Make or make approved by GE) 40mm thick in a single layer having a compressive strength of M45 grade to columns, Beams / Slab soffits & where ever it required in isolated areas of repair works to RCC members complete all as specified and directed.

M&L for polymer modified plastering in CM 1:6, 15mm thick on fair faces of brick / concrete surafces finished even and smooth without using extra cement and using Nitobond SBR at the rate of 4% of weight of cement complete all as specified and directed. Note : SBR shall be measured and paid separately

Supply only Styrene Butadiene Rubber (SBR) latex emulsion complete all as specified and directed. Make of SBR emulsion / latex : Sika, Fosroc, STP,Dr Sunanada, BASF, star coatings or approved by GE

M&L for Dry spray repair mortar - Fosroc make or make approved by GE, Renderoc DS40 @ 40mm thick to the Slab soffits, columns, chajjas, lintels, staircase slabs, Beams, parapets etc. Application procedure : Stock the sufficient quantity of RENDROC DS40 and washed/dried 6mm downgraded course aggragate at site, the premixed factory made polymer modified dry spray concrete and 12.5 kg of 6mm downgraded aggregate shall be placed into the funnel arrangement of the dry spray concrete pumping machine. Water shall be filled in the water tank and connected to the dry spray concrete pumping machine. The prepared and SBR ploymer modifies bonding coat applied surface shall be in a tacky state. The dry spray concrete shall be pumped through the hose connected to the compressor and pumping machine. At the tip of the concrete pumping nozzle, water shall be added at the time of

concrete spray. The concrete shall be sprayed continously to achieve the required thickness and continued up to the prepared surface. Immediately after the spray is completed. water shall be sprinkled over the surface and finish the concrete surface with steel float / leveling frame until smooth finish is achieved. The process shall be continued for the entire prepared surface. The qouted rate includes cost of all materials, cost of hire charges of machineries, tools and all labour charges etc. complete all as specified and directed.

M&L for two coats of weather proof acrylic emulsion to ceilings and walls of old surface of gallaries including surface preparation complete all as specified and directed.

Note : The above items are to be executed in the gallaries of the jetties (restricted work environment). The rates quoted shall be considered for all the safety gear, scaffolding, height, lead and lift in all the items.

UNITY PROJEKTZ (BID ID -3139389)

sai ganesh enterprises (BID ID -3144718)

GVR CONSTRUCTIONS (BID ID -3146223)

JAI BHARAT BUILDERS (BID ID -3147051)

RAGHU RAMA PANDA (BID ID -3140033)

SREE HANUMAN ENTERPRISES (BID ID -3138244)