Refurbishment and Structural repairs works

Amount

Chipping and removal of spalled concrete, cracked, porous and weak concrete up to a depth of 20mm behind the reinforcement rods or depth of carbonation whichever is deeper and cleaning of the reinforcement bars and exposed concrete to remove scales by chipping, wire brushing, emery sheets, cleaning the entire surface by blowing compressed air or water jet etc., to enable the measurement of reduced dia. of the bar, application of zinc primer to the reinforcement on all sides of the reinforcement and application of epoxy bonding agent to exposed old concrete surfaces. This also includes the chipping and removal of guniting work carried out recently to check the reinforcement in order to decide on the requirement and addition of reinforcement etc., complete all as per specifications and as directed by the Engineer- in-Charge. Note: Payment towards application of zinc primer and epoxy bonding agent shall be paid in respective item.

Chipping and removal of spalled concrete, cracked, porous and weak concrete up to a depth of 25mm fron the outer face and cleaning of the reinforcement bars and exposed concrete to remove scales by chipping, wire brushing, emery sheets, cleaning the entire surface by blowing compressed air or water jet etc., to enable the measurement of reduced dia. of the bar, application of zinc primer to the reinforcement on all sides of the reinforcement and application of epoxy bonding agent to exposed old concrete surfaces. This also includes the chipping and removal of guniting work carried out recently to check the reinforcement in order to decide on the requirement and addition of reinforcement etc., complete all as per specifications and as directed by the Engineer- in-Charge. Note: Payment towards application of zinc primer and epoxy bonding agent shall be paid in respective item.

Supply and application of two coats of anti-corrosion primer MasterEmaco P130 of BASF / NITOZINC PRIMER of FOSROC or equivalent product approved by the engineer-in-charge as per the list mentioned in the Specific requirements under Notes to the Agency as per manufacturer’s recommendation to the exposed steel reinforcement including manpower, brushes, scaffolding arrangements etc., complete all as per specifications and as directed by the Engineer-in-Charge.

Providing and replacing new reinforcement in place of corroded reinforcement bar and Removing corroded worn out portion of reinforcement ( when the area of bar is damaging by more than 25%) by cutting and replacing the same by a new reinforcement bar of requisite diameter by binding with required lap / welding with old bar, including cost of reinforcement , complete in all respect including removing unserviceable materials from site complete all as per specifications and as directed by the Engineer-in-Charge

Providing watertight/ Leak tight shuttering using plywood of 10mm to 12mm thickwith suitable wood runner, joint and with provision for pouring micro concrete. The formwork shall be fixed to lines and dimension to get finished edges and stable to retain the form shape and resist leakage under hydraulic pressures of micro concrete complete all as per specifications and as directed by the Engineer-in-Charge

Supply, mixing and placing in position the Micro Concrete MasterEmaco S466 of BASF/ RENDEROC RG (S) of FOSROC or equivalent product approved by the engineer-in-charge as per the list mentioned in the Specific requirements under Notes to the Agency as per the manufacturer's recommendations as directedby the Engineer-in-charge including mixing in suitable and approved mixing machine, pumping of micro concrete under pressure using approved Pneumatic pumps or manually so as to ensure that the concrete laid for encasement in dense, properly compacted, free from honey combs etc. all as directed and approved by the Engineer-in-charge, including the skilled applicators.

Providing and application of bonding agent with long open time at all heights MASTER BRACE 1414 of BASF or equivalent product approved by the engineer-in-charge as per the Specific requirements and application of bonding agent as per manufacturer's recommendation etc., complete all. as per specifications, drawings and as directed by Engineer-in-charge.

Providing and mixing MasterEmaco SBR 2 in plastering mortar for RCC old structures BASF/FOSROC construction chemicals make or approved equivalent including tax and transportation etc., complete all as per specifications, drawings and as directed by Engineer-in-charge

Plastering with cement mortar 1:4, 12mm to 20mm thick for RCC surface Repairs for internal and external faces, finished smooth including mixing MasterEmaco SBR 2 of BASF / Nitobond SBR / approved equivalent at the rate of 7 Lt. / Bag of cement, over the primed surface using Nitobond SBR in 1:1:3 by volume (SBR: Water: Cement). Repair mortar has to be applied before priming coat dries, if the bonding compound dried it should be re-coated, scaffolding, cleaning and washing the surfaces , curing etc. complete all as per drawings, specifications and as directed by the Engineer-in-Charge. Note: MasterEmaco SBR 2 of BASF / Nitobond SBR shall be supplied by department.

Providing and applying two coats of high performance, acrylic resin based protective and decorative coating MasterProtect 300even shade on all plastered surface of walls at all heights, all tools, tackles, materials, manpower’s, equipment’s, machinery etc., all complete as per specification, drawings and as directed by Engineer-in-charge.

Providing and fixing double scaffolding system(cup lock type) on the exterior side of building/structure, above ground level, including additional rows of scaffolding in stepped manner as per requirement of site, made with 40mm dia M.S. tube, placed 1.5metre centre to centre, horizontal & vertical tubes joint with cup and lock system with M.S tubes, M.S tube challis, M.S. clamps and staircase system in the scaffolding , working platform , walkway wherever required , lighting arrangement etc. and maintaining it in serviceable condition for execution of work of civil repair/structural repair & rehabilitation /cleaning and/or pointing and/or applying chemical and removing it thereafter. The scaffolding system shall be stiffened with bracing, runners, connecting with the building etc. wherever required, if feasible, for inspection or work at required locations with essential safety features for the workman etc., complete as per directions and approval of engineer-in charge

Dismantling old plaster or skirting raking out joints without disturbing structure and cleaning the surface for plaster at all levels including disposal of rubbish to the dumping ground within 100 metres lead all as per specifications and directed by the Engineer-in-charge.

Plastering with Cement Mortar 1:5, 20mm thick for brickwork on its external faces including hacking pock marking of concrete surfaces with pointed tool, scaffolding, curing and forming grooves wherever necessary all complete as per specifications and as directed.

Providing and laying plain cement concrete 1:2:4 screeding using 20mm maximum size graded aggregates including mechanical mixing, transporting and placing in required position, ramming, compaction, levelling, curing, shuttering, finishing as directed if any, complete all as per specification for levelling courses in foundation for walls, footings, floor drains etc., encasing pipes and other required works directed by Engineer-in-Charge complete all as per specifications.

Dismantling of RCC works at all levels by manually / by mechanical means, including Cutting and stacking of steel reinforcement bars and disposal of unserviceable materials within 50m lead as per specifications and directed by the Engineer-in-charge.

Manufacturing, supplying, hoisting and fixing in position at all lifts, precast units of various patterns and sizes for precast plain solid units, slabs, exhaust fan moulds etc., in reinforced cement concrete of 1:2:4, using 20mm and below machine crushed graded stone aggregate including weigh batching, mechanical mixing, casting, vibrating, finishing of exposed faces, curing, necessary formwork & moulds, transporting and placing at all lifts, preparation of connections, grouting with cement mortar/cement grout wherever needed excluding steel reinforcement complete all as per drawing, specification and as directed by Engineer-in-Charge.

Providing, straightening, decoiling wherever necessary bending, cutting, binding and fixing in position steel reinforcement TMT bars of Fe500D grade steel conforming to IS:1786 'SAIL or VIZAG or approved equivalent make' and tying with approved annealed binding wire of 1.6mm dia in all reinforced cement concrete work at all lifts, including cost of supplying and fixing the spacer/cover blocks in cement mortar 1:2 and binding wire complete all as per specification and as directed by Engineer-in-Charge at all lifts. Note: The rate shall be including the cost of reinforcement steel. The reinforcement steel will be procured from dealers with a test certificate as approved by the department. For further details please see Clause 11 of Section VIII, General Information for Guidance of Tenderers.

Conveying the surplus excavated earth & debris, boulders and spoil by mechanical means and depositing at places inside DAE installation identified as Dumping yard as per requirement with a lead specified below including collecting,loading, unloading, breaking clods, levelling all complete as per specification and as directed by the Engineer-in-Charge.Lead charges for 1st 1 kilometre or part thereof Note: 1) The rates in respect of this Item are applicable for the NET Quantities arrived at after making deductions for voids @ 20% in respect of soil and @ 50% in respect of Rock from the corresponding Stack / Truck measurements. 2) The earth shall be dumped well inside the Dumping yard and not over approach pathway road.

A.BASHKAR