Special repair to Bldg No P145 at NOFRA under GE Gomantak Vasco

Demolition of reinforced cement concrete in ground floors and pavings n.exc. 15 cm thickness(below or above ground level) (reinforcement cut as required to facilitate demolition) complete all as specified and directed.

Demolition of cement concrete unreinforced in ground floors and pavings n.exc. 15 cm thickness (below or above ground level) complete all as specified and directed.

M&L for mild steel TMT bars upto 8 mm dia, 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 0.90mm dia or securing with clips complete all as specified and directed.

Demolition of Brick Work/ stone work / concrete block wall built in Cement Mortar including all quoins, arches, pillars, etc. of any descriptions, complete all as specified and as directed.

M&L for precast cement concrete block masonry, type C-1 (1:3:6) (20 mm graded aggregate) with solid blocks, exc 10 cm in width and setting in CM 1:6 complete all as specified and as directed.

M&L for chipping removing carefully concrete work by low impact hammer, breakar without damaging the structure & cleaning and disposal of debries out side the premises etc complete all as specified and directed Note: - Hard concrete should not be removed by force.

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 either side of the cracks by carefully marking 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, provinding and applyin priming/bonding coat of slurry made out of "Polyalk EP" and cement (or equivalent as specified in the list of brand names) in proporiton 1:1 to surfaces prepared as instructed and directed. Filling the cracks/grooves by providing and applying "Polyalk EP" Polymer modified cement mortar (or equivalent as specified in the list of brand names) in proporiton 1:5:15 (Polyalk EP: Cement: Graded Sand/Quartz Sand) on the prepared surfaces and finishing it in the level with the existing plaster including hand packing, curing and making the surface similar to the external plastering using wooden floats/punch etc. complete all as specified and directed.

M&L for drilling hole 12 mm dia, 50 to 100 mm deep, cleaning the hole with air blower and fixing 12 mm dia Rohibb Teflon nozzles in RCC structure members at interval of 500 mm C/C in staggered manner or as directed at site and external end of nozzle to be machine to receive outlet of grouting gun fixed with thixotropic epoxy putty to ensure complete sealing, curing and drying for minimum 12 Hrs and cutting extra nozzle with chiser/ cutter complete all as specified and directed.

M&L for injecting low viscosity MONOPOL (3-5 Cps) with high molecular weight monomer by pressure and using mechanized injector gun with accessories till nozzle refuses to accept the grout, including mixing the material components (part a & b) in the reuired quantities as per manufacturer instructions by weigh batching, maintaining grouting pressure at exit 0.5 to 1 Kg/Sqcm by monitoring pressure gauge at exit, grouting material minimum 100 ml per nozzle and repeat the process till nozzle refuses to accept the material complete all as specified and directed.

M&L for applying structural grade EPIBOND-21-LP prior to application of any type of plaster mortar conforming to ASTM-C-882-91 (Arizona Slant Shear test) to ensure bond between old and new concrete complete all as specified and directed.