Bharat Heavy Electricals Limited Tender

Internal plaster Dismantling old plaster or skirting raking out joints and cleaning the surface for plaster including disposal of rubbish to the dumping ground within 50 metres lead.

Chipping of loose concrete : 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. 50mm average thickness

Demolition of Brick work: 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 building rubbish/ malba / similar unserviceable, dismantled or waste materials by mechanical means, including loading, transporting, unloading to approved municipal dumping ground or as approved by Engineer-in-charge, beyond 50 m initial lead, for all leads including all lifts involved.

Reinforcement Cleaning & Rust Removal: Cleaning of rust from reinforcement bars to give its 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 ity application with wire brush and thoroughly washing with water and allowing it to dry, all complete as per direction of Engineer-in-charge. Procedure for Rust removal & application: Cleaning as directed & specified all rust/scales/corrosion from reinforcement bars using rust remover Reebaklens RR- Rust remover, cleaning and etching agent supplied in 1 and 5 Litre containers, having Specific Gravity 1.16 - 1.22 @ 25°C. Reebaklens RR cleaning agent is a combination of acid based material, corrosion inhibitors and dispersing agents and is supplied as a clear green solution. Application of Reebaklens RR coverage @ 2-2.5 m2/ltr with brush for complete wetting of rusted metal surface and allowed to react it for 16-24 hours followed by cleaning the surface with wire brush and washing surface with fresh water as required to exposed reinforcement bars complete as specified. HSE Guidelines : Recommended to wear tight-fitting, dust-resistant, chemical splash goggles if airborne dust is generated, Wear protective gloves. Wear appropriate clothing to prevent any possibility of skin contact. -Bars upto 12mm diameter (8 mm stirrups)

Bars above 12mm diameter (20 mm main bars)

Anticorrosive Treatment to Steel: Providing and applying single coat of zinc rich anti corrosive coating such as nitozinc primer in 40 micron thickness to the exposed reinforcing bars after application of alkaline rust remover on main and lateral links all complete as directed by Engineer-in-charge Procedure for Anti-corrosive epoxy zinc rich coating: Providing & applying inhibition coats/system to exposed reinforcement bars after drying & also new bars after cleaning & removing scales and rust completely as specified. Nitozinc Primer- Two component epoxy zincrich primer supplied in 1 and 5 Litre pack, two component system based on metallic zinc and epoxy resin which on mixing gives a grey coloured liquid. An Anti corrosive coat contents Active 'Zinc-rich' system which combats corrosion by electro chemical means. having specific gravity of 1.75, Adhesive bond strength 1.5 N/mm2 Solid content- 60 %, Fully dry/Recoatable- 45 minutes to 1 hour. Typical application includes surface preparations by cleaning steel surface to a bright condition paying particular attention to the back of exposed steel bars, mixed two components slow speed heavy duty drill fitted with a paddle, applying unbroken coat of 100 microns WFT with suitable brush coverage @ 4-5 m2/ltr and allow to dry, after 30 mins apply second coat to ensure complete cover to exposed steel/ rebar etc. complete. Total Dry film thickness is 40 microns/coat. HSE Guidelines : Nitozinc Primer and Nitoflor Sol should not come in contact with the skin and eyes, or be swallowed. Adequate ventilation should be ensured and inhalation of vapours should be avoided. suitable protective clothing, gloves and eye protection shall be worn. If working in confined areas, suitable respiratory protective equipment must be used. The use of barrier creams, provide additional skin protection. In case of contact with skin, it shall be rinsed with plenty of water, then cleansed with soap and water. 8 mm stirrups

20 mm main bars

New Reinforcement: Steel reinforcement for R.C.C. work including straightening, cutting, bending, placing in position and binding all complete above plinth level. Thermo-Mechanically Treated bars of grade Fe-500D or more.

Epoxy Bond Coat: Providing and applying bond coat on the prepared surface to receive new polymer mortar/polymer modified concrete, with two components epoxy based bonding coat Concresive 1414 of BASF/Nitobond EP of Fosroc or equivalent material in one full coat. Laying of reinstatement polymer mortar or micro concrete shall be completed within the overlay time of bonding coat. This bond coat act as bonding agent between old and new concrete. Item rate inclusive of all materials, labours, supervision, tools, tackles, transportation, fixing etc., complete as per specification and as directed by Engineer-in-charge Procedure for Epoxy Bond Coat: Providing and applying bond coat on the prepared surface to receive polymer modified mortar/polymer modified micro concrete, with two component epoxy based bonding coat Nitobond EP- Epoxy resin concrete bonding agent supplied in 1/2, 1 and 4 Litre packs, having specific gravity 1.15 to 1.2 gm/cc, Compressive strength(BS 6319 Pt.2) - 50 Mpa at 7days, Flexural strength strength(BS 6319 Pt.3)- 35 Mpa at 7 days, Tensile strength (BS 6319 Pt.7)- 20 Mpa at 7 days, Shear Strength (BS 6319 Pt.4) - 10 Mpa at 7 days, having an over lay time of 6 hrs and 30 ̊C, High bond strength High bond strength : Bond strength is more than the tensile strength of good quality concrete, Barrier\coat : Acts as a ‘barrier coat’ to the migration of chloride ions from host concrete. Laying of reinstatement polymer modified mortar or micro concrete shall be completed within the overlay time of bonding coat. The bond coat act as a bonding coat between old and new concrete. Typical application includes cleaning all loose dust, dirt, grease from host concrete surface by suitable means, mixing both components of bond coat by heavy duty slow speed mixer until a uniform consistency, apply unbroken coat of Nitobond EP coverage @ 2.6 m2/ltr with stiff brush covering complete area of patch repair and allow the same to become tacky before placing mortar or micro concrete. Item rate is inclusive of materials all labour, tools and tackles, scaffolding andtransportation etc. complete as per specification and as directed by Engineering-in-charge. HSE Guidelines : Recommended to wear tight-fitting, dust-resistant, chemical splash goggles if airborne dust is generated, Wear protective gloves. Wear appropriate clothing to prevent any possibility of skin contact. Barrier creams provide additional skin protection. Do not smoke during use. Maintain ample ventilation. If contact with the resin occurs, wash immediately with a strong detergent or a resin removing cream. Eye contamination must be immediately washed with plenty of water and medical treatment sought.

Single Part PMM Treatment: Providing and laying of polymer modified single component, alkaline resistant fibre reinforced, duel shrinkage-compensated, thixotropic, cementations patch repair mortar Emaco S48CT of BASF/ Renderoc SP 40 of Fosroc or equivalent material that achieves compressive strength of 35 MPa at 7 days and finishing with trowel carefully compacting the same around the rebars and finishing to bring it in line with existing concrete surface on the beams, slabs. pile caps etc., where the thickness of application is less than 50mm in patches as per specification after applying bonding coat (bonding coat shall be payable separately). Item rate inclusive of all materials, labours, supervision, tools, tackles, etc., complete as per specification and as directed by Engineer-in-charge. For Built up thickness up to 40 mm (incl.+5mm) Procedure for Polymer modified Mortar-Patch repair (Up to Grade M45): Providing and laying Renderoc SP 40- shrinkage controlled polymer modified single component, alkaline resistant fibre reinforced, thixotropic, cementitious patch repair mortar supplied in 25 kg moisture resistant bag when mixed with clean water at w:p ratio 0.18, achieves compressive strength (BS 1881 Pt.116) - 20 Mpa at 1 day & 45 Mpa at 28 days, Tensile Strength(BS 6319 Pt.7) 2.5 Mpa at 28 Days, Flexural Strength(BS 6319 Pt.3)7 Mpa at 28 days, Drying shrinkage to ASTM C 157-93, 28 days 1000 microstrain capable of applying up to 50 mm thickness in single layer. Renderoc SP 40 shall have CE (CE-29842) marking and compliance according to Construction Products Directive 89/106/EEC (CPD). Typical application includes mixing entire bag with clean water about 4.25L to 4.5 L, mixed in suitable container with heavy duty slow speed mixer machine to achieve uniform lump free mortar consistency, placing over prepared surface or tacky Nitobond EP surface in recommended thickness and finishing with trowel carefully compacting around the rebars to bring it in line with existing concrete surfaces on the beams, slabs, piles etc. Item rate is inclusive of materials all labour, tools and tackles, scaffolding and transportation etc. complete as per specification and as directed by Engg.-in-charge. HSE Guidelines : Recommended to wear tight-fitting, dust-resistant, chemical splash goggles and mask if airborne dust is generated, Wear protective gloves. Wear appropriate clothing to prevent any possibility of skin contact.

Shear Connectors:Providing and Fixing Shear connectors of 10 mm dia. HYSD steel with two component, styrene & cement free, epoxy-acrylate fixing and anchoring compound (having the chnical parameters mentioned in material specifications) using standard sealant applicator gun after drilling holes of 12mm diameter to a minimum depth of 100mm at required locations, inclusive of all material, manpower and equipment. MasterFlow 935 of BASF / Lokfix P25 of Fosroc or equivalent

Galvanic Sacrificial Prevention of steel by Point anodes: Providing and fixing sacrificial zinc anode to prevent initialization of corrosion of reinforcement in adjoining sound concrete due to chloride ingress or prevent corrosion due to loss of passivity due to carbonation etc. by installing anodes from VECTOR Galvashield XPI of size 25X25x125mm and having zinc mass of min. 60 grams of 1 A P type or equivalent for patches or periphery of patches at Min. 2 to 4 anodes / Sq.mt. area of concrete (spacing of 430 to 610mm) or equivalent, as per manufacturer specification, covered with mortar with of resistivity less than of parent concrete on the cleaned reinforcement steel as per manufacturers specification before applying passivation coating and also design calculation , monitoring for current available from anodes as required by manufacturer as per IS12696 etc. at all heights and including of all material, labour, tools, plant and machineries, etc. complete as directed by Engineer-in-charge and/or consultant.

Brickwork above Plinth- Brick work with common burnt clay F.P.S. (non modular) bricks of class designation 7.5 in superstructure above plinth level up to floor V level in all shapes and sizes in : Cement mortar 1:4 (1 cement : 4 coarse sand)

New External Plaster : 18 mm cement plaster in two coats under layer 12 mm thick cement plaster 1:5 (1 cement : 5 coarse sand) and a top layer 6 mm thick cement plaster 1:3 (1 cement : 3 coarse sand) finished rough with sponge.

New Internal Plaster in patches: 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 proper shape, raking out joints and preparing and plastering the surface of the walls complete, including disposal of rubbish to the dumping round, all complete as per direction of Engineer-in-Charge. With cement mortar 1:4 (1 cement : 4 fine sand)

External Waterproof Paint :Providing & Applying Polymer waterproof Painting of Asian Paints Ultima Protect/Dulux Next Gen Paint/ Pidilite Raincoat , 1 Base coat of Polymer Duralife without dilution & 2 Coat,Top coat of Ultima Protect with 40% water dilution. Scrapping old paint, Cleaning all surface by Jet Pressure pump of fresh water, removing all fungus, vegetation, Algae & Opening crack by grinder in 'V' shape up to 3mm, cleaning, 1 coat primer & filling all cracks by crack seal, finishing , Cleaning the surround surface etc. as per manufacturer specification. The paint shade shall be approved by engineer in charge. Approved Make: Asian's Ultima Protect/DuluxNext Gen Paint/ Pidilite Raincoat With 10 yrs. guaranty for Paint & 10 yrs for water seepage. Scaffolding shall be paid extra at actual. Measurement: Paint applied Surface measurement. Special Note: Two stages inspection shall be done by manufacturer 1) After Surface preparation 2) Final certification of paint application confirming the quality / DFT & consumption as per specification. Final warranty certificate shall be released on successful application on confirmation by Client & Manufacturer.

Surface Preparation: Before waterproofing treatment, Removal of existing acrylic and synthetic coating / APP Membrane, surface preparation including final cleaning of the surface using wire brush, mechanical grinding and jet washing. Coving : Providing and applying single component, ready to use polymer modified repair mortar or approved equivalent, designed forconstructing joints, coving and for RCC members like beams, columns and slabs. It shall be suitable for repair of thickness up to 50 mm. Repair mortar shall have good compressive strength and shrinkage resistance. It shall be pre-blended with special additives which provides it excellent workability and adhesion to host concrete/masonry surfaces. Repair mortar shall be applied with w/p ratio of 0.19 for 25 kg bag and shall have the properties Compressive Strength @ 30°C is 38 MPa at 28 day, Flexural Strength @ 30°C is 8 MPa, Tensile Strength @30°C is 2.5 MPa, Fresh Wet Density is 2111 kg/m3, etc. complete as per manufacturer specifications. Primer Coat: Providing and applying of two component, primer by mixing resin and hardner at a ratio of 1 : 3 and also thinned with water upto 100% by weight. Epoxy primer is applied @ 180 - 200grams per sqm. It is a sealer cum primer coat & acts as a anti dust layer, which enhances the substrate to have a good bonding with waterproofing coating. Waterproofing Coat: Supplying and applying Poly-urethane coating for SRI coating & Waterproofing membrane with Mechanical, Thermal, Chemical, UV and Weather resistant properties. Minimum elongation 350%, Tensile strength 2.0 Mpa as per ASTM D412, Tear strength of 15N/mm as per ISO 34-1 and Shore A hardness : 70 as per ASTM C836. The system consists of applying waterproofing treatment @1.6 kg/sqm for 02 coats with reinforcement of spun bonded non-woven geotextile(60-100g/sqm). The coating is to be continued from affected areas till coving joint to end of parapet wall. Post Completion of waterproofing activities, the substrate needs to be checked for water tightness & leak free condition, ensured by flooding water on the treated area for about 48 - 72 hrs .