Providing Roof Guard and Wall Guard to D type 8 Nos and F type 10 Nos Quarter Blocks at National Institute of Technology Warangal

Chipping of unsound/weak concrete material from slabs, beams, columns etc. with manual Chisel and/ or by standard power driven percussion type or of approved make including tapering of all edges, making square shoulders of cavities including cleaning the exposed concrete surface and reinforcement with wire brushes etc. and disposal of debris for all lead and lifts all complete as per direction of Engineer-In-Charge(For slabs where Brick bat coba is present) 50mm average thickness

Demolishing brick work manually/ by mechanical means including stacking of serviceable material and disposal of unserviceable material within 50 metres lead as per direction of Engineer-in-charge. In cement mortar

Disposal of moorum/building rubbish/ malba/ similar unserviceable, dismantled or waste material by mechanical transport including loading, transporting, unloading to approved municipal dumping ground for lead upto 10 km for all lifts, complete as per directions of Engineer-in-charge.

Providing, mixing and applying bonding coat of approved adhesive on chipped portion of RCC as per specifications and direction of Engineer-In-charge complete in all respect. SBR Polymer (@10% of cement weight) modified cementitious bond coat @ 2.2 kg cement per sqm of surface area mixed with specified proportion of approved polymer

Providing, mixing and applying SBR polymer (of approved make) modified Cement mortar in proportion of 1:4 (1 cement: 4 graded coarse sand with polymer minimum 2% by wt. of cement used) as per specifications and directions of Engineer-in-charge. 50 mm average thickness in 3 layers.

12 mm cement plaster of mix 1:4 (1 cement: 4 fine sand)

Repairs to plaster of thickness 12 mm to 20 mm in patches of area 2.5 sq.meters and under, including cutting the patch in propershape,raking out joints and preparing and plastering the surface of the walls complete, including disposal of rubbish to the dumping ground, all complete as per direction of Engineer-in-Charge With cement mortar 1:4 (1 cement : 4 fine sand)

Painting with synthetic enamel paint of approved brand and manufacture of required colour to give an even shade : One or more coats on old work

Supplying and applying of wall guard (fosrac brand/Dr.Fixit or anyother equivalent brand) for External walls where the dampness is observed and instructed by Dept. including all materials, labour incidental and operational charges complete etc., for 2 coats on old external walls after applying one priming coat (fosrac brand/Dr.Fixit or anyother equivalent brand). The operation shall be carried out after scrapping and properly cleaning the surface to remove loose particles with wire brushes and filling of cracks with Nitoseal PU50 as per the direction of Engineer-in-Charge. Procedure to be followed: 1) Surface Preparation: Surface shall be prepared by mechanical grinding to remove all loose mortar, laitance, oil, grease, decayed matter and algae growth. 2) Filling of Cracks: Identify cracks on the walls and then chasing them open in the form of groove (Cutting of the crack shall be done of size 5 mm x 5 mm) and Fill the groove with sealent of (fosrac brand/Dr.Fixit or anyother equivalent brand) properly.3) Priming coat: The prepared surface shall be applied one coat of acrylic primer, prior to the application of wallgaurd, prime coat should be air cured for 6 hours. 4) Wall gaurd application: wall gaurd (Fosroc brand/Dr.Fixit or anyother equivalent brand) at a thickness of 110 microns DFT each coat, in two coats. Each coat must be air cured for 6 hours. (GST applied as per DSR-23) Note: The above work has to be done with the help of trained and skilled labour.

Supplying and applying of roofguard (fosrac brand/Dr.Fixit or anyother equivalent brand), a single component acrylic polymer modified, elestomeric fiber reinforced waterproofing coating applied in three coats of thickness 1 mm DFT in three coats after applying one priming coat on the roof, including all materials, labour incidental and operational charges complete etc., . The operation shall be carried out after scrapping and properly cleaning the surface to remove loose particles with wire brushes and filling of cracks with Proper sealent as per the direction of Engineer-in-Charge., Procedure to be followed: 1) Surface Preparation: Surface shall be prepared by mechanical grinding to remove all loose mortar, laitance, oil, grease, decayed matter and algae growth.2) Filling of Cracks: Identify cracks on the walls and then chasing them open in the form of groove (Cutting of the crack shall be done of size 5 mm x 5 mm) and Fill the groove with sealent of (fosrac brand/Dr.Fixit or anyother equivalent brand) properly.3) Priming coat: The prepared surface shall be applied one coat of acrylic primer, prior to the application of wallgaurd, prime coat should be air cured for 6 hours. 4) Wall gaurd application: wall gaurd (Fosroc brand/Dr.Fixit or anyother equivalent brand) at a thickness of 110 microns DFT each coat, in two coats. Each coat must be air cured for 6 hours. (GST applied as per DSR-23) Note: The above work has to be done with the help of trained and skilled labour.