REPAIR TO BLDG REHABILITATION AND EXTERNAL WALL TREATMENT AT CERTAIN BLDG AT NAD UNDER AGE BR II AT NAVAL STATION KARANJA

Amount

Notes: (i) Supplying and erecting steel scaffolding upto required height with top platform with support railing at top etc., the scaffolding should be secured properly in position, complete as per site requirement and directions of Engr-in-charge. (ii) Supply and fixing of dust proof netting with all required accessories/ fixing arrangement so as to cover existing installations and arrest the materials generated during repair works in adjoining areas and to prevent damage or nuisance to the existing structure; including proper provision of netting system at shown area before start of work, removal after completion of work, carrying out regular cleaning etc., complete as per site requirement and directions of Engr-in-charge. (iii) Supporting the structural components temporarily during repair and strengthening works using heavy duty flat-headed steel pipes vertically in plumb, braced horizontally and diagonally at center with each other using suitable heavy steel tubes, and resting on wooden blocks to support the structure provisionally during repairs and maintaining them in position for required duration complete as per site requirement and directions of Engr-in-charge.

(iv) Structural rehabilitation work shall be got executed through one of the specialist firm(s) listed below as approved by GE prior to commencement of work:- (a) Rebuild Technologies Services Pvt Ltd 602, 6th Floor, Tulsee Chamber, Teen Petrol Pump, Thane (W) E (b) Techton Buildcons Pvt Ltd 203, Plot No 6, Milenium Plaza, Sakinaka Telephone Exchange Lane, Off AK Road Andheri E-Mumbai 72 (c ) Sanrachana Structural Strengthening Pvt Ltd 103, 104, Monalisa CHS, Hariniwas Circle, Thane West - 400602 (d) USHTA Infinity Construction Co Pvt Ltd Ushta House, C-17/79 Krishna Industrial Estate, Gorwa, Vadodara - 390016 India (e) Gubbi Civil Engineers 18/26 Dev Prayag CHS, Opp Thanawala garage, Bhakti Mandir Road, Near Hari Nivas Circle Thane (W), Thane, Maharashtra 400602

Removing, chipping and cleaning of existing loose and damaged concrete carefully upto 60mm thickness by low impact high frequency hammer or by manual chipping without damaging the existing concrete including cleaning the surface by air jet and stacking and disposal of unserviceable materials outside the premises, etc., complete all as specified and as directed by Engr-in-charge.

Material and labour 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 drycomplete all as specified and as directed by Engr-in-charge.

Material and labour 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

Material and labour 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 complete all as specified and as directed by Engr-in-charge. Make / brand MONOBOND SBR of Krishna Conchem or Dr. Fixit epoxy bonding agent or Shalicrete URP of STP Ltd.

Material and labour 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 25mm to 30 mm thickness including leveling profiling etc. complete all as specified and as directed by Engr-in-charge.

Material and labour 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 under :- (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.

Material and labour 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.

Material and labour 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 materialas: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 as directed by Engr-in-charge..

Mild 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 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.

Providing and fixing but 5mm dia and over upto and including 10mm dia additional main steel 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. complete (Steel provided on the basis of 1% of volume of concrete). 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.

Providing and applying jacketing around columns with Micro concrete (Molith-MC) M40 including all lifts, shuttering, drilling holes and fixing shear anchor as per specification complete. Note: (a) Reinforcement shall be measured and paid separately. (b) Quoted rates shall be deemed to be inclusive of necessary jacketing, formwork and micro concrete all as per manufacturer's instruction and as directed by the Engineer-in-Charge.

Material and labour for new or external wall surface by wire brushing/grinding in order to remove dust, dirt, loose particles, laitance. Thereafter wash the surface with mechanical water nozzle with clean water & allow to dry. Fill visible cracks/ joints by crack seal compound and epoxy base joint filler including resin and hardener in proportion as per manufactures instruction & allow to dry for 24 hours. Apply one coat of water base primer (with mechanically airless paint sprayer machine) and allow to dry for 6 hours appx.Thereafter apply 02 coats of WB high build anti coronation coating cum waterproofing (with mechanically airless paint sprayer machine) & match with brush at the interval of 08 hours between the coat and allow to dry to match the existing shade in camouflage pattern including or plain paint necessary scaffolding necessary security for the workers for any height, covering etc. complete all as per specified and directed. Note:- External water proofing treatment on wall at any height of the building including acrylic paint shall be applied by mechanically Airless paint sprayer machine only.

Material and labour for old plastered external wall surface and complete removal of existing treatment by wire brushing/grinding in order to remove dust, dirt, loose particles, laitance. Thereafter wash the surface with mechanical water nozzle with clean water & allow to dry. Fill visible cracks/ joints by crack seal compound and epoxy base joint filler including resin and hardener in proportion as per manufactures instruction & allow to dry for 24 hours. Apply one coat of water base primer (with mechanically airless paint sprayer machine) and allow to dry for 6 hours appx.Thereafter apply 02 coats of WB high build anti coronating coating cum waterproofing (with mechanically airless paint sprayer machine) & match with brush at the interval of 08 hours between the coat and allow to dry to match the existing shade in camouflage pattern including or plain paint necessary scaffolding necessary security for the workers for any height, covering etc. complete all as per specified and directed. Note:- External water proofing treatment on wall at any height of the building including acrylic paint shall be applied by mechanically airless paint sprayer machine only.

Water treatment of chajjas/projected portion : The treatment shall consist of followings:- Cleaning the surface to be free from standing water. Prime the surface with UV stable Polyurethane water proof liquid membrane at 400gm/sqmt dilute with water 1:1 Apply 1st coat of ShaliPrime WP WB at 400gm / Sqmt. Apply 1st coat of UV stable Polyurethane water proof liquid membrane White at 1Kg/Sqmt. Place 40 Gsm Geotextile / FG Tissue as reinforcement followed by 2nd coat of UV stable Polyurethane water proof liquid membrane at 1kg/sqmt. Ensure final curing of 36hrs before carrying any further work. Extend water proofing treatment and terminate at the top of the edge of the parapet wall Seal the Groove using repair mortar.

Material and labour, injection chemical GLYPHOSPHATE (4% Concentration) of 20 ml or till refusal by making cut / injection in the stem of plant of roots at 30 mm and spraying with solution 25 ml GLYPHOSPHATE (4% concentration diluted with 1 ltr of water) and removing the Plant / vegetation of following girth including penetrated roots complete including necessary scaffolding etc. for plants / vegetation of size 0-20 cm girth complete all as specified and as directed by Engr-in-charge.

Material and labour, rendering 15mm thick on fair faces of brick work or concrete surfaces of walls in cement mortar 1:6 finished even and smooth with out using extra cement. complete all as specified.

Material and labour, rendering 15mm thick on fair faces of brick work or concrete surfaces of walls in cement mortar 1:4 finished even and smooth with out using extra cement. complete all as specified.

Material and labour preparation of new plastered surface of ceiling and applying three coats of white wash on ceiling complete all as specified and directed.

Material and labour, preparing new plastered surfaces of walls and applying two coats of oil bound distemper over a coat of Chalk whiting, on plastered including preparing surfaces complete all as specified and directed.

Material and labour, preparation of new or previously untreated plastered surfaces of walls and applying two coats of acrylic antifungal paint exterior grade paint plaint or camouflage pattern over one coat of primer complete all as specified and as directed.

Dismantling wall and ceiling boards (fiber, pulp, insulation, etc.) or insulation boards/slabs/ blankets, any thickness, including cover fillets omplete all as specified and as directed.

Supply and fixing , anodised aluminium snap grid frame work of size 605 x 605 mm for false ceiling omplete all as specified and as directed.

Supply and fixing, hangers 6 mm dia. G.I. (upto 1200mm length) adjusting level fixed to roof slabs by means of ceiling cleats made out of G.I. flat 40 x 3 mm size 60mm long and expansion hold fasteners 12.5mm dia. 40mm long complete all as specified

Supply and fixing, 4 mm thick asbestos cement plain building boards, fixed to aluminium snap grid framework in ceiling complete all as specified and as directed.

Refixing old 4 mm thick asbestos cement plain building boards, fixed to aluminium snap grid framework in ceiling complete all as specified and as directed.

Material and labour, preparing new or untreated asbestos cement board surfaces as in ceiling and applying two coats of oil bound distemper over complete all as specified and directed.

Material and labour, preparing old asbestos cement board surfaces as in ceiling and applying one coats of oil bound distemper over complete all as specified and directed.

M/s. Prakash Construction (BID ID -3084621)

kalakriti enterprises (BID ID -3081009)

K N CONSTRUCTION (BID ID -3086498)

M/s Vishwakarma Enterprises (BID ID -3084501)