WBPWD/EE/KND/NIeQ-20/2026-2027

Cleaning as directed & specified all rust/ scales/corrosion from reinforcement bars using rust remover Reebaklens RR or equivalent -Rust remover, cleaning and etching agent, 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 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. Item rate is inclusive of materials all labour, tools and tackles, and transportation etc. complete as per specification and as directed by Engg.-in-charge.

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 or equivalent Two component epoxy zincrich primer 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 Zinc content >84 % by weight, 40 microns DFT, 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 with suitable brush 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. Item rate is inclusive of materials all labour, tools and tackles, and transportation etc. complete as per specification and as directed by Engg.-in-charge.

Providing cementitious based injection grouting at construction joints, leaking spots and honey combs with 40 psi pump using Cebex 100 @ 225gms of Fosroc Chemicals or equivalent mixed to 50 kg bag of cement including joints packing using polymer modified mortar. Fixing of nozzles and chipped portions of nozzles shall be reinstated using Lokfix S of Fosroc Chemicals as per manufacturer's specification. Item rate is inclusive of materials, fixing and removal of nozzles, all labour, tools and tackles, and transportation etc. complete as per specification and as directed by Engg.-in-charge.

Providing and applying Epoxy bonding agent on the prepared surface to receive polymer modified mortar/polymer modified micro concrete, with two component epoxy based bonding coat Nitobond EP Std of Fosroc make or equivalent, having Compressive strength(BS 6319 Pt.2)-40 Mpa at 7 days, Flexural strength strength(BS 6319 Pt.3)- 25 Mpa at 7 days, Tensile strength (BS 6319 Pt.7)- 15 Mpa at 7 days, Bond Strength (ASTM 4 C881)-11 Mpa at 7 days, having an over lay time of 3 Hrs at 35 °C. 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. Item rate is inclusive of materials all labour, tools and tackles, Shuttering Supporting material and transportation etc. complete as per specification and as directed by Engg.-in-charge.

Providing and laying Renderoc SP 40 or equivalent - shrinkage controlled polymer modified single component, alkaline resistant fibre reinforced, thixotropic, cementitious patch repair mortar supplied in 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. 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 and finishing the same with trowel carefully compacting the same around the rebars and finishing to bring it in line with existing concrete surface on the beams, slabs, piles etc., where the thickness of application is less than 50 mm in patches as per specification after applying bonding coat. Item rate is inclusive of materials all labour, tools and tackles, and transportation etc. complete as per specification and as directed by Engg.-in- charge. Payment shall be made as per actual site measurement.

Providing and fixing of Rebars of dia (max 16mm) at specified distances by drilling of holes of appropriate diameter up to a depth as directed by EIC in to the concrete or as per the manufacturer recommendation, cleaning the holes with water and air blower to make sure that there is no fine particles present in the hole followed by chemical anchoring application using Epoxy chemical anchoring Lokfix E77 or approved equivalent, shall comply with EAD 330087-00-0601, systems for post-installed rebar connections, and EAD 330499-01-0601 for anchoring fixings into cracked and un-cracked concrete, having compressive strength (EN196-1)- >110 N/mm2, Flexural Strength (EN196-1) >60N/mm2, Axial Tensile Strength (ISO 527-2)->40, Density 1.5kg/L, in cartridge as per the given proportions recommended by the manufacturer in the cleaned holes to a minimum depth of 2/3 rd of the hole, fixing of the rebars of the grade Fe-500 & following sizes and curing. The cost to include all materials, labour, machinery, tools, tackles and consumables complete with all by-works as per drawings, specifications, manufacturer's recommendation, good engineering practice and as directed by EIC.

Providing and applying polymer modified Non shrink high strength micro-concrete like Renderoc RG of Fosroc make or equivalent having compressive strength (BS 4551-80)-50 Mpa at 28 Days, Tensile strength-2 Mpa @ 28 Days, Flexural Strength(BS 4551-80)-5 Mpa at 28 Days, Young's modulus-25 kN/mm2, Expansion characteristics (ASTM C827 -1987)-Unrestrained expansion 1 to 4 %, Pressure to restrain Plastic Expansion-Approx. 0.004 N/mm2, Thermal Conductivity 1.5 W/m "C. Pouring the same into the leak proof formwork using suitable arrangement or if required using pumping device for uniform flow of micro concrete. The side shuttering can be removed after 3 days and the bottom shuttering after 7 days ensuring proper bond between the micro concrete and existing concrete substrate. Item rate is inclusive of materials all labour, tools and tackles, Shuttering Supporting material and transportation etc. complete as per specification and as directed by Engg.-in-charge.

Application of protective layer(Exterior)- Eco friendly, waterproofing cum protective coating based on hydrophobic polyester resin Providing mixing and applying over the finished substrate using Single pack UV stable, environmentally friendly, solvent, pitch and asbestos free, chemical resistant, high performance, grey colour viscous liquid coating based on hydrophobic polyester resin Nitocote PE 135 with chemical and abrasion resistance to prevent corrosion in reinforced concrete members applied at the rate of 5m2 per litre. Item rate is inclusive of materials all labour, tools and tackles, scaffolding and transportation etc. complete as per specification and as directed by EIC. Properties: Surface drying time - 10-15 min @ 35°C, Overcoating time: (ASTM D1640) 34 hours @ 35°C, Complete cure: 7 days @ 25°C, Water absorption (BS 1881 Pt. 122): 0.2%, Reduction in water absorption (BS 1881 Pt. 122): >90%, Adhesion strength (ASTM D4541): >1.0N/mm2, Curing efficiency: moisture loss (applied on 24 hrs cured mortar) <0.55 kg/m2 (ASTM C309), UV resistance(ASTM D4459): No undue change in colour observed on exposure to UV, Carbon dioxide diffusion resistance (EN 1062-6): 2015: 124.10 m, Global Migration Test: < 0.8 mg/sq. in