REPAIR REPLACEMENT OF STAIR CASE, RAILING AND CONNECTED CIVIL WORK AT SLIPWAY, DEGAUSSING BAY AND VLM JETTY AT NAVAL DOCKYARD VISAKHAPATNAM UNDER GE (I) (DM) VISAKHAPATNAM

Amount

Taking down cement plaster on brick / concrete surfaces racking out joints locking for key, scrubbing down with water etc., complete all as specified and directed.

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 present in the surface and making good the corrogated reinforcement by providing reinforcement/welded steel wire fabric for strengthing the structure by welding or tying with MS wire (annealed) not less than 0.90 mm dia where required and removing of dust and loose particle complete all as specified and directed. Note: Reinforcement/welded steel wire fabric shall be measured and paid as supply only rate under recpective items in this schedule.

M&L for preparation of exposed surafces 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. (Length of reinforcement steel bar shall be measured for payment 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.

Supply only deformed or twisted reinforcement bar of any dia complete all as specified and as directed.

M&L for aplying a coat of poymer modified cementious bonding coat on the concrete surface with one coat of styrene butadiene rubber latex emulsion (SBR latex) manufactured by M/s Fosroc chemical or equivalent chemical manufactured by Sika india india pvt Ltd/ Choksey chemicalpvt Ltd/ M/s STP/ M/s Dr Sunanada with four parts of water and six parts of cement by weight coverage of SBR latex 0.25Ltr/sqm for one coat complete all as specified and directed.

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 40mm thick guniting by chemical mortar prepared by Rendroc DS 40 manufactured by Fosroc (25kg Rendroc DS40 mixed with 12.5kg of 6mm downgraded crushed stone aggregate) or equivalent chemicals manufactured by Sika india pvt Ltd/ Choksey chemical pvt Ltd/ M/s STP/ M/s Dr Sunanada on prepared concrete surfaces complete all as per manufacture instruction & as directed.

M&L for 20mm thick guniting by chemical mortar prepared by Rendroc DS 40 manufactured by Fosroc (25kg Rendroc DS40 mixed with 12.5kg of 6mm downgraded crushed stone aggregate) or equivalent chemicals manufactured by Sika india pvt Ltd/ Choksey chemical pvt Ltd/ M/s STP/ M/s Dr Sunanada on prepared concrete surfaces complete all as per manufacture instruction & as directed.

Demolition of reinforced cement concrete Work of any description (Reinforcement cut as required to facilitate demotion) complete all as specified and directed.

M&L for fixing injection grouting nozzle of suitable size and injecting grouting material, low viscosity epoxy based grouting material Conbextra EP10 in to the cracks with pressure of 40 psi mechanically including sealing the hole complete all as specified and directed. Note: Conbextra EP10 epoxy grouting material shall be measured and paid separately.

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 Note: The qouted rate deemed to be included for formwork / shuttering, if any required.

M&L for rendering plaster in CM 1:4, 15mm thick on fair faces of brick / concrete surfaces of walls, 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 SBR chemical for mixing in polymer modified plastering complete all as specified and directed.

M&L for preparation of exiting concrete dock wall surface of dry/oil/sea weed growth/ damp by means of mechanical grinding to achieve a rough coherant substrate having an excellent anchor profile removing all the loose material, rust dirt etc clean and dry the surface by using vacuuming equipment, water jet and compressed air, if required surface shall be lightly grit blasting or detergent washed to get PH value neutrally complete all as specified and directed.

Periodical maintenance for removing of vegetation growth on the jetties / wharfs wall with required tools and plants and cleaning and removing the same outside of Naval Dockyard by employing 05 Nos. of Mazdoors for 8 hours / day complete all as specified and directed.

M&L for providing two coats of carbonation resistant film chemical "Deck gaurd S" of M/s FOSROC or make approved by GE not less than 150 micron (dry film) per coat over treated area / plaster complete including a coat of "Deck gaurd S primer or 150mm micron or equivalent chemical manufactured by sika india pvt Ltd/ Choksey chemical pvt Ltd/ M/s STP/ M/s Dr Sunanada on dock walls complete all as specified and directed.

M&L for decorative (Endura tiles/stair tiles) 7 to 8mm thick in tread/rise/landing of stair laid over15mm thick cement screed bed (1:6) and jointed with grey cement slurry and pointed with white cement with admixture of pigment to match the shade of tiles complete all as specified and directed.

Dismantling of mild steel work or wrought iron of any description in any position complete all as specified and directed.

S&F for horizontal and verticle railing with SS-304 grade of 2 to 3mm thick round pipe/ Square/Rectanguar for safety railing and ladder using welding made out of SS-304 heavy duty, maintenance free, corrosion resistant, aesthetic looking stainless steel extruted sections and fixed to the verticle and horizontal including taking down of existing railing/ladder and making good the distrubed surfaces with PCC (1:1.5:3) type A0 using 12.5mm graded crushed stone aggregate complete all as specified and directed.

Demolition of concrete (unreinforced) of any description and in any position not otherwise specially provided for and removing debris outside ND(V) complete all as specified and directed.

M&L for design mix cement concrete M-30 grade (using 20mm graded aggregate) as in floor finishing the surface fair & even with out using extra cement complete all as specified and directed.

Disposal of collected garbage / debris from the galleries outside Naval Dockyard all as specified and directed.

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

M&L for preparation of old painted steel surfaces of any description over 10cm width or girth and applying one coat of synthetic enamel paint complete all as specified and directed. Note : - The work will be carried out in every three months or as per direction of Engineer-in-Charge for enhancing its serviceablity. Every coat / work will be measured and paid separately.

sai ganesh enterprises (BID ID -3186123)

SRI SIMHADRI COMPANY (BID ID -3189209)

SPAAN Infratech (BID ID -3188979)

aswitha engineering works (BID ID -3189169)

pavantejaklimmaat enterprises (BID ID -3188309)

sree karthika fabs (BID ID -3188978)

UNIVERSAL ENTERPRISES (BID ID -3188798)

Gv.Raviraju (BID ID -3188991)