Repair and restoration of fundamental members like column beams slabs and connected items of bldgs at various TPs Adm block Sickbay and other OTM Accn of INS Tunir under AGE B R II at Naval Station Karanja

Chipping, removing carefully concrete work by low impact hammer, breaker without damaging the structure and cleaning and disposal of debris outside the premises etc., hard concrete should not be removed by force, complete all as specified and directed by Engr-in-Charge. Note item Nos. 1 to 81 :- The cost of following provisions & scaffolding, shall be deemed to be included in quoted rates of serial items nos. 01 to 81:- (a). Cleaning the floor surface area after painting work if contractor fail to cleaning the floor surface a recovery @ Rs. 75.00 per Sqm of floor area shall be made from his dues. (b). Supplying, erecting and use of scaffolding up to required height around the building (max 20 to 25m) or up to 6th floor height with necessary H-frames, pipes, couplers, buckles, bracing, top platform with support railing at top etc. at all levels of building including carriage of the materials to the location, erecting, fixing the scaffolding and dismembering the same after working and taking away the scaffolding materials etc.

M&L for Clean existing reinforcement with wire/ rotary wire brush, making the surfaces free from loose material dirt etc. complete and applying two coats of alkaline rust converting primer FEOVERT of Krishna Conchem or Roff rust cleaner of Pidilite or Dr. Fixit Rust removal or ShaliRust of STP Ltd. on the rebars, including cleaning the reinforcement, wire brushing to remove loose rust spalls, wash the rebars with clean water within 3 min and wipe it dry, complete all as specified and directed by Engr-in-Charge

M&L for applying two coats of Epoxy based Zinc primer in a span of four hours over the treated rebars and allow to dry for six hours. The application shall be by brush. Epoxy primer for steel of make / brand - Corroseal-ZR of Krishna Conchem or Dr. Fixit Epoxy zinc primer, complete all as specified and directed by Engr-in-Charge

M&L for cleaning all loose laitance on the concrete substrate and applying one coat of epoxy bonding agent on exposed concrete surface to ensure bond between old concrete & new concrete by brush application. Make / brand Monobond SBR of Krishna Conchem or Dr. Fixit epoxy bonding agent or Shalicrete URP of STP Ltd., complete all as specified and directed by Engr-in-Charge

M&L for Building up the profile of structural members by using latex additives(MONOBOND) modified air cured mortar system (Polymer modified mortar) (1:5:15 = 1 monobond-5Cement-15 sand) -in damaged areas in 30-40mm thickness including levelling profiling etc complete all as specified and directed by Engr-in-Charge

M&L for Drilling and fixing Rohibb Teflon nozzles in RCC members, including drilling holes of 12mm dia, 50 to 100mm deep holes. Works shall be carried out as mentioned below, complete all as specified and directed by Engr-in-Charge :- (i) Cleaning of holes. Clean the holes by air blower prior to fixing nozzles. (ii) Fixing of nozzles. Insert 12mm dia. Rohibb Teflon nozzles in cleaned holes. External end of nozzles to be machine to receive outlet of grouting gun. Fix it inside the holes by applying thixotropic epoxy putty to ensure complete sealing. Cure the system for min.12 hrs. (iii) Cutting of nozzles. Cut the nozzles by chisel after completion of grouting without damaging structural elements. (iv) In case crack upto 2mm wide, fix the injection nozzles directly over the cracks, at intervals of 6 to 9 inches, using a drilling machine. Fix PVC/MS nozzles in these holes with fast-setting epoxy putty & let it dry for 2 to 3 days. Also, seal the crack between the ports with epoxy putty. (v) In case where the crack is wider than 2mm upto 4 to 5mm, drill holes at the sides of the crack in a staggered fashion, at intervals of 6 inches and affix them with epoxy putty as mentioned above. (vi) Also, seal the face of the crack with a liberal application of the epoxy putty.

M&L for Injecting of site mixed cement slurry grout, mixed in specified proportion containing cement, sand water with addition of plasticizers (approved make) & migratory corrosion inhibitors, water cement ratio shall be varied between 0.5 to 1.0 for each hole, shrinkage compensating cement slurry mixed to a lump free fresh creamy consistency ,Mixing shall be done by mechanical mixer continuously stirring mechanically to keep cement particles in suspension. Injection of approved/specified grout by means of pump at a pressure of 3-5 Kg/cm2 etc complete till the grout mix flows out from the nozzle indicating complete filling of grout in the holes drilled. Make / brand of Epoxy grout - Dr. Fixit Epoxy injection or EPCO KP-HP-250 of M/s Krishna Conchem or Shaligrout EI of STP Ltd. complete all as specified and directed by Engr-in-Charge

M&L for Injecting low viscosity (3-5cps) high molecular weight monomer by pressure and using mechanized injector gun with accessories till nozzles refuses to accept the grout, Including, Mixing of materials : Mixing of material components(part a&b) in the required quantities as per manufacturer's instruction by weigh batching. Grouting : Fill the grouting gun with concrete penetrating corrosion inhibitor EPCO-KP-100/Protectsil CIT or Ferogard 903. Maintain desired pressure in the gun by air compressor; maintain the pressure at exit(2 to 3kg/cm2) by monitoring pressure gauge at exit. Grout the material through prefixed nozzles in the structural elements@ 100ml per nozzle. Repeat the process for all the nozzles, complete all as specified and directed by Engr-in-Charge

M&L Mild TMT steel bars 10mm dia and over, cut to length, bent to shape required, including cranking, bending spirally for hooping for columns, hooking ends and binding with and including mild steel wire (annealed) not less than 0.9mm dia or securing with clips complete all as specified and directed by Engr-in-Charge Note:- Replacement of steel reinforcement with TMT bars of appropriate size where 30% of cross section is reduced including dismantling of rusted steel complete all as specified and directed.

M&L for providing and fixing additional main steel TMT bar or stirrups of designed diameter in various structural elements like column ,beams and foundations including drilling ,bending, welding and fixing the bars with epoxy putty etc. (Steel provided on the basis of 1% of volume of concrete), complete all as specified and directed by Engr-in-Charge