SPECIAL REPAIR OF BUILDING NO P-05 AT KRIMCHI COMPLEX UNDER GE (NORTH) UDHAMPUR

Chipping / removing loose concrete up to reinforcement bars, without damaging the reinforcement, removing all the loose materials and to make all the exposed surfaces free from oil, dust and all impurities etc. complete all as specified and directed.

M&L for removing all loose scale and corrosion deposits of the exposed corroded steel including surface preparation, corroded steel should be cleaned all around including the back of exposed reinforcement with the clearance/ gap between steel and concrete as recommended by manufacturer, then applying rust remover with brush by complete wetting the rusted material surface by rust remover and leaving for 24 hours and thereafter surface preparation of coated bars and applying 2nd coat of rust remover and leaving the same for the specific period as per manufacturer's instructions and further again preparing and cleaning the steel surfaces for treatment, complete all as specified and directed by the Engineer-in-Charge. Make :- Sika Rustoff 100 / Fosroc Rebacklens / BAS Emaco S420.

Providing and fixing rebar of 8/10/12mm dia TMT bars of required length and diameter with sika anchor fix @ 3+ fosroc lock fix / equivalent in BAS wherever required in RCC members including power drilling, cleaning of holes, then rebar should be inserted in the holes that should the filed with epoxy as mentioned above to ensure the bond as per manufacturer's instructions complete as per site requirement and as directed by Engineer-in-Charge.

Providing and fixing rebar of 16/20mm dia TMT bars of required length and diameter with sika anchor fix @ 3+ fosroc lock fix / equivalent in BAS wherever required in RCC members including power drilling, cleaning of holes, then rebar should be inserted in the holes that should the filed with epoxy as mentioned above to ensure the bond as per manufacturer's instructions complete as per site requirement and as directed by Engineer-in-Charge.

Corrosion Resistance Coating :- M&L for applying passivator / anti corrosion coating to the prepared reinforcement steel surfaces of relevant items mentioned here-in-above of this BOQ. The material shall be cement based polymer modified coating for corrosion protection and shall be applied as per manufacturer's instructions, complete all as specified and directed. Note :- Site for application is at various locations and height varies upto 15.0 Mtr. Cost for scaffolding and other means shall be deemed to include in the quoted rates. Make :- Sika Armatec 108 / Fosroc Nito cole AP-35 / Equivalent in BASF.

M&L for preparation of old RCC / concrete surface and applying a coat of (two components solvent free) epoxy bonding agent using brush after cleaning of surface from all dust or laitance complete all as per manufacturer's instructions and as directed by Engineer-in-Charge. Note :- Site for application is at various locations and height varies upto 15.0 Mtr. Cost for scaffolding and other means shall be deemed to include in the quoted rates. Make :- Sika Sikadur 32 LP / Fosroc Nitobond EP / Equivalent in BASF.

Providing and applying ready to use single component high strength polymer modified cementious repair mortar 25mm thick with water / powder ratio as specified by manufacturer so as to achieve the following parameters :- (i) 28 days Compressive Strength >= 50 N/mm2 (ii) Flexural Strength at 28 days>= 5 N/mm2 Note :- Site for application is at various locations and height varies upto 15.0 Mtr. Cost for scaffolding and other means shall be deemed to include in the quoted rates. Make :- Sikatop 122 HS / Fosroc Nito Mortars / Equivalent in BASF

Curing Compound :- M&L for applying high efficiency water based film forming curing compound over the fresh concrete cementious surface to form a continuous non-penetraling coating providing a barrier to moislure loss ensuring more effcient cement trydration improved durability and reduced shrinkage. Teh compound shall be applied by sprayer only as per manufacturer's instuctions to ensure complete and proper coverage, pump pressure should be maintained to give an even fine spray and finish as per the manufacturer's specification and as directed by Engineer-in-Charge.

(vi) Contractor shall furnish a written guarantee for structural repairs carried out under above serial items of BOQ for a period of five years. An amount to the tune of 5% of total amount quoted against ser item Nos 1.00 to 8.00 or Rs. 50,000.00 whichever is less shall be held back from contractor's payment as security deposit against the guarantee period of 5 years from certified date of completion. Alternatively, the contractor may give interest bearing deposit in favour of GE (North) Udhampur for five year for the sum mentioned here-in-before which shall be refunded back after satisfactory completion of five year from date of completion.

(vii) Close vigil & promptness on the progress and joint measurement has to be ensured and Photographic evidence in Soft copy for complete repair process for each structural members shall be taken by contractor & handed over to GE. (viii) The Construction chemical/ Fibers to be used shall be of following approved brands :- (a) Sika (b) Chembond (c) Hilti (d) BASF (e) Dr.Fixit (f) FOSROC (g) CICO (h) STP Limited.