SPECIAL REPAIR TO BLDG NO P-74 (SERVICE BLOCK) OF INHS ASVINI

Demolition of reinforced cement concrete of any description and in any position and removal of debris to out side MD land complete all as specified and directed.

M&L for errecting steel tubular props of requied height , L head or flat head braced at center and supproting a continous 2"X3" wooden runner, resting on wedge and block, minimum capacity 3 Ton to support the structure provisionally during repair and jacketing etc. and maintain them in position till requied item etc. The props are erected in perfect vertical in plumb taking/transfering the load equally/uniformly. The location of every prop should be one over another floor and it should be eccentric. The tightening of every prop should be uniform to all props to strain the building uniformly, removing the same as and when directed by structural Engineer/site Engineer. The work should be carried out with all the safety belt and adequate labour insurance under the supervision of qualified supervisor and remove the same completion of work etc. complete all as specified and directed.

Chipping off existing loose, damaged Concrete from RCC members of all affected RCC Columns, Beams, Slabs and Chajjas on external and internal areas, etc carefully with chisel and hammer Providing and applying ‘Rusticide SS’ Rust passivator or Techno comercial equivalent as aproved to existing r/f. bars Including wire brushing of reinforcement, cleaning washing of concrete etc complete as directed.Providing and applying two coats of Rust Preventor slurry made out of “Polyalk Fixoprime” or techno comercial equivalent and cement in proportion 1:1.5 to existing r/f.bars as directed complete. Providing and applying bonding coat of slurry made out of “Polyalk EP” or Techno comercial equivalent and cement in proportion 1:1 to concrete and r/f substrates complete as directed Providing and applying “Polyalk EP” or Techno comercial equivalent . Polymer Modified Cement Mortar in Required proportions(1:5:15) to RCC members Including Hand packing, curing and making the surface rough for plastering.

M&L for Providing and laying in position reinforced cement concrete of specified grade cement with rushed stone aggregate mixing in concrete mixer including bailing out water,compacting, finishing surface, curing and including the cost of centering and shuttering a all level Nominal Mix of 1:2:4 (1 cement OPC: 2 coarse sand : 4 graded stone aggregate 20 mm nominal size.

Supplying, Drilling/Cleaning hole and injecting Hilti make ETA Approved HY-200-R chemical. Application to be designed separately for Rebars as Simply Supported, Moment or Splice Connection as per EC2/TR 023 or relevant tested and accepted rebar guidelines. The chemical should have ETA approval for seismic rebar as a minimum qualifying criterion. Drilling hole with double flute type drill bits or hollow drill bits to the required depth by rotary hammer drill, cleaning with brush and jet of clean air, filling resin and hardener using serrated nozzle to eliminate mixing error with standard HDE A22 battery dispenser along with piston plug. The installation and the setting instructions should be strictly followed as per the manufacturer’s recommendations. The adequate diameter and embedment of rebars to be decided as per PROFIS Rebar Software & the report to be submitted to the project manager/ design engineer for approval. Scanning before drilling to be done to avoid hitting existing rebars. HY200 -10 mm dia 200mm depth.(Rates includes scaffolding cost )

FILLING AND REINSTATING OF SEPARATION CRACKS Opening the Separation Cracks at the Junction of RCC and Masonry where ever directed and instructed into ‘’V’’ Grooves 2’’ to 3’’ from the either side of the cracks and 20-25mm wide and 15-20mm in depth by carefully marking the areas to be opened up using a Cutting machine and skillfully /carefully Chiseling with a well sharpened chisel and hammer as directed including Wire brushing and washing of concrete Substrata and masonry walls with water jet to the surfaces thus prepared to the entire satisfaction of the Consultant as instructed and directed.

Moistening the Cracks, Providing and applying priming/bonding coat of slurry made out of “Polyalk EP”and cement (or equivalent as specified in the List of Brand names) in proportion 1:1 to surfaces prepared as instructed and directed. Filling the Cracks /Grooves by Providing and applying “Polyalk EP” Polymer Modified Mement Mortar (or Techno comercial equivalent as specified in the List of Brand names) in Proportion of 1: 5: 15 (Polyalk EP: Cement: Graded sand/quartz sand) on the prepared surfaces and finishing it in level with the existing plaster Including Hand packing, curing and making the surface similar to the external plastering using wooden floats/punch etc. complete as per specified and directed.

M&L for Drilling holes of required size upto 16 mm Diameter and up to 50mm depth in concrete and cleaning the same complete all as specified and directed.

Providing and fixing 12 mm diameter aluminum/PVC injection nipples and securing the same as directed & Providing and injecting Cementitious Grout using CEBEX-112 additive of ‘Fosroc’ or Techno comercial at the rate of 225 grams per bag of cement and using suitable mechanical gun/pump including mixing etc complete.