Rasra Nagar Palika Parishad Water Supply Reorganization Scheme under AMRUT 2.0 Programme

Providing and fixing double scaffolding system (cup lock type) on the exterior side, up to seven story height made with 40 mm dia M.S. tube 1.5 m centre to centre, horizontal & vertical tubes joining with cup & lock system with M.S. tubes, M.S. tube challies, M.S. clamps and M.S. staircase system in the scaffolding for working platform etc. and maintaining it in a serviceable condition for the required duration as approved and removing it there after . The scaffolding system shall be stiffened with bracings, runners, connection with the building etc wherever required for inspection of work at required locations with essential safety features for the workmen etc. complete as per directions and approval of Engineer in-charge .The elevational area of the scaffolding shall be measured for payment purpose .The payment will be made once irrespective of duration of scaffolding. Note: - This item to be used for maintenance work judicially , necessary deduction for scaffolding in the existing item to be done.

Surface Preparation:- 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

25mm average thickness

Cleaning of reinforcement from rust from the reinforcing bars to give it a total rust free steel surface by using alkaline chemical rust remover of approved make with paint brush and removing loose particles after 24 hours of its application with wire brush and thoroughly washing with water and allowing it to dry , all complete as per direction of Engineer-In-Charge.

Provision of following works- Provison for the surface of structure to be treated for strengthening to be roughened properly either by raking joints or by hacking the cement concrete surface with a specially made hacking tool or other wise alternatively to make the surface rough and dust free by providing spatter key or wire brush.

Injection grouting in vertical surface/wall Placing and fixing nozzle by drilling machine in tank wall having minimum dia of Nozzle 15mm and provided on a regular interval not exceeding 1m including construction joints. Injection of pidicrete AM (polymer based on shrinkage high strength grout) admixed with cement through nozzles under pressure by sump @ 250 gms per bag of cement. Sealing the nozzle after grouting with Polymer product mixed with cement.

Repairing of spalled and lose concrete where reinforcement is exposed apply like fixit rust remover by means of brush to the reinforcement for clearing bars and steel surface then apply a bonding coat of acreylic based polymer with cement slurry in 1:1 ratio to the pre-wet cencrete by brush. Now apply the mixture of 1:1 cement, coarse sand to the prepared substrate when primer becomes tacky. of 50 mm thick M25 grade. (Taking 20% of total surface area of OHT)

Change of S.S. ladder inside the tank, repair of M.H. cover of top dome, change of masquoto jali with new one complete.

Supply and fixing of 20 mm dia G.I. pipe railling in stair case and balcony. Taking only 50% new and 50% old materials)