Rashtriya Chemicals And Fertilizers Limited Tender

Cleaning the concrete surfaces with hydrojet, keeping optimum pressue using clean water and detergent/other cleaning materials as necessary including removing all dust, grease, stains etc. to render the surface clean including removing all traces of cleaning materials etc. complete as specified and directed.

Chipping of unsound/weak concrete material (including plaster if any) from slabs, beams, columns etc. with manual Chisel and/ or by standard power driven percussion type or of approved make including making square shoulders of cavities including cleaning the exposed concrete surface and reinforcement with wire brushes etc. complete as per direction of Engineer-In-Charge.

Providing & applying One coat of Alkaline Rust convertor ('Feovert' or equivalent) to exposed rebars of RCC, after removing & cleaning loose rust by wire brush and leave it for 6-8 hours. (Item to be used for rebar treatment where micro-concrete is being used.)

Providing & applying One coat of Concrete Penetrating Corrosion Inhibitor (Surface applied) which works on Bipolar Inhibition Mechanism, 'EPKO-KP-100' of Krishna Conchem or equivalent, on entire concrete surface to be repaired by using brush at 250 ml per Sq.Mt./Coat or as per manufacturer’s specification and prior to application of first coat of anti corrosive coating to reinforcement.

Providing and fixing shear connector for anchoring of additional reinforcement bars. The rate includes making 10/12 mm dia. holes in RCC member using electrically operated hammer drill machine, to a depth of 75mm at 0.5m c/c or as directed in zig-zag pattern, cleaning the holes by blowing air, fixing pre-cut and pre-bend 100x50mm , L shaped - 8mm dia. rebar(Fe-500 grade) using 'Lokfix P' of FOSROC or equivalent adhesive, such that 75mm is out of 100mm is inserted in concrete and 25mm remain outside along-with 50mm bend.

Providing and fixing in position, Thermo-Mechanically Treated steel bar (Fe 500 grade) reinforcement of various diameters as additional reinforcement or replacement of corroded bars as directed,including straightening, cutting, bending, hooking the bars, binding with wires or tack welding, supporting as required etc. all complete at all levels.

galvanic protection: Providing & fixing zinc based Tied-on Sacrificial Anode units ( 'Galvashield XP' of FOSROC or equivalent) to the reinforcement. The anode shall be connected to the reinforcement steel by connectors provided with the anode application area is at the junction of repair. One anode per meter including tying to the bar etc., complete. Size : 55-65mm dia. and 25-30mm thick.

Corrosion protection of unexposed old reinforcement on non-spalled concrete by Insertion of sustained release Corrosion inhibiting caplets like 'Powrthrow', by drilling 20-22 mm dia holes into the concrete at a depth of 30-40 mm and inserts to be filled by epoxy sealant EPCO-1010 or equivalent. Spacing of Powrthrow shall bea) For RCC Columns- 1 Units in a single drilled hole at a spacing of 1m c/c from two opposite faces in staggered fashion b) For RCC Beams- 1 Units in a single drilled hole at a spacing of 1m c/c from two opposite faces in staggered fashion C) RCC Slab- 4 Units in a single drilled hole in 1 sqm area in a grid pattern OR as directed by Engineer-in-charge.

Providing and laying in position plain cement concrete of Nominal Mix of 1:1.5:3 grade (1 cement : 1.5 coarse sand : 3 graded stone aggregate 20 mm nominal size cement with trap / granite / quartzite / gneiss metal) mixing in concrete mixer including bailing out water, compacting, finishing surface, curing and including the cost of centering and shuttering at all level.

Providing and inserting 12mm dia PVC injection nozzles in honey comb area and along crack line including drilling of holes of required diameter (20mm to 30mm) up to depth from 30mm to 80mm at required spacing and making the hole & crack dust free by blowing air, sealing the distance between injection nipple with adhesive chemical of approved make and allow it to cure complete, cutting of protruding part after curing, as per direction of Engineer-In-Charge.

Providing and injecting, Stirrer mixed, Acrylic Polymer modified Cement grout ( polymer of approved make @ 2% of weight of cement used) made with non shrink compound in concrete/RCC work in proportion recommended by the manufacturer into cracks/honey-comb area of concrete/masonry by suitable gun/pump at required pressure including cutting of nipples after curing etc. complete as per directions of Engineer-in Charge. (The payment shall be made on the basis of actual weight of approved grout injected.)

Providing and applying, ready to use Polymer Modified Mortar for treatment to the damaged RCC members, upto 15 mm thickness at a time in following steps; Removing loose rust from the reinforcement bars by wire brushing, light hammering etc. and applying one coat of Alkaline Rust convertor ('Feovert' or equivalent) to exposed rebars as approved by Engineer in charge. The rusted surface shall become blackish non rusted colour. After 24 hours of application of rust remover, loose particles shall be removed by brush. Apply one more coat of rust convertor. Apply bonding coat slurry of acrylic polymer-cement (Mix 1 Kg of acrylic polymer with 0.5 Kg of cement) as approved by Engineer in charge on surface where PMM is to be applied. Apply ready to use PMM by adding 13 - 16% water by weight of Polymer Modified Mortar. After mixing polymer modified mortar, it can be trowel applied or hadpacked. When applying by hand, polymer modified mortar must be forced tightly into the substrate to ensure complete contact with the substrate. Rate is inclusive of scaffolding, curing.

Providing and applying, ready to use Polymer Modified Mortar for treatment to the damaged RCC members, from15 to 30 mm thickness at a time in following steps; Apply bonding coat slurry of acrylic polymer-cement (Mix 1 Kg of acrylic polymer with 0.5 Kg of cement) as approved by Engineer in charge on surface where PMM is to be applied. Apply ready to use PMM by adding 13 - 16% water by weight of Polymer Modified Mortar. After mixing polymer modified mortar, it can be trowel applied or hadpacked. When applying by hand, polymer modified mortar must be forced tightly into the substrate to ensure complete contact with the substrate. Rate is inclusive of scaffolding. This item shall be operated over the first layer of PMM (0-15mm), i.e. if the thickness is more than 15mm upto 30mm.

providing and applying polymer modified, ready mixed, cement micro concrete of any thickness as per site requirement of approved brand including curing etc. as per manufacturer's specifications or as per instructions of engineer in-charge (the items shall be paid on actual consumption of micro concrete only). etc. as directed by e-i-c and including necessary m.s. pipe scaffolding.Minimum 7 days curing shall be done to the newly repaired/jacketed area using any suitable method. Minimum Required Compressive strength (ASTM C109 7cm cube) of Ready Mix Micro Concrete used on site shall not be less than 35 MPa in 7 Day and 40 MPa in 28 Days.

Providing and applying epoxy bonding agent(resin+hardner), as per manufacturer's specifications, prior to applying the epoxy mortar to the concrete surfaces etc complete. The coverage shall be 2.20Sqm/kg of mix or as per manufacturer.

Providing and applying epoxy mortar of resin and hardner with Sillica (quartz sand) sand upto 20 mm thickness. Epoxy material shall be of Huntsman(Araldite)/Sika/Fosroc or its equivalent including etc complete.

Providing & applying Carbon Fiber sheet laminate of 100mm width on surface of structural members including Surface Preparation, Profiling, Fixing, Sand Pasting as follows; 1)Surface Preparation: Grinding / moulding concrete substrate, cleaning it with wire brush, removing oil, laitance if present etc. complete, 2)Profiling: Applying PRIMER on prepared substrate, filling holes and uneven surface with PUTTY etc., complete, 3)Fixing Laminate: Applying the Carbon fibre laminate to structural element at desired orientation using tamping roller to avoid any air voids etc., Repeat the same procedure for multiple layer with interval of 8 hours, 4)Sand Pasting: Applying saturant, rectify air voids if any, paste the river sand on it to make surface rough to take any further finishes. (Note: Mode of Measurement shall be Per Running Metre of Fiber laminate used excluding lap. The weight of carbon Fiber sheet shall be 450GSM with tolerance of +/- 10GSM. This item to be executed with prior approval and as directed by Engineer in Charge.)

Providing second class Burnt Brick masonry with conventional/ I.S. type bricks in cement mortar 1:6 in superstructure including striking joints, raking out joints, watering and scaffolding etc. Complete

Providing and applying 20 mm thick sand faced cement plaster by using ready-mix mortar ('Aerocon' of HIL or equivalent) at all levels & locations in two coats for masonry (except stone masonry) and concrete surfaces including racking out joints, hacking of concrete surface, finishing, curing, scaffolding etc. complete.

Providing and applying 12 mm thick sand faced cement plaster by using ready-mix mortar ('Aerocon' of HIL or equivalent) at all levels & locations in single coats for masonry (except stone masonry) and concrete surfaces including racking out joints, hacking of concrete surface, finishing, curing, scaffolding etc. complete.

Providing & applying water proofing cement paint of required shade to old & new surfaces in Two coats over one primer coat including scaffolding, preparing the surfaces and curing. etc. complete. (Item to be used for Transfer Tower walls internal surface).

Providing and applying first single coat of approved acrylic primer and two coats of acrylic distemper (oil bound distemper) of an approved make and colour as per manufacturers specifications to any surface, at all height and locations as directed including scaffolding, cleaning and preparing surfaces for painting with broom by any approved means, etc. complete as directed by Engineer-in-charge.(item to be used for plastered internal surface of Operation floor)

Providing and applying epoxy base paint of approved make to RCC columns, beams, slabs, parapets etc. including cleaning the surfaces thoroughly so as to remove deposited salts, oil, grease, tar, moisture etc. from the surface, preparing the surface, applying putty consisting of epoxy base paint and steolite powder, to render the concrete surfaces smooth by covering small irregularities and applying two coat of epoxy paint over one primer coat including scaffolding etc. complete as specified and directed.

Lowering/shifting the debris of dismantled plaster/concrete from initial stacking, by any means without causing dust nuisance and damages to structure, stacking the same on ground level as and where directed, including cleaning the site etc. complete.

Disposal of building rubbish / malba / similar unserviceable, dismantled or waste materials, product spillage, by mechanical means including loading from ground, transporting, unloading to approved dumping ground inside factory premises or as directed, beyond 50 m initial lead, for all loads including all lifts involved.