Maintenance of Underground Water Tanks of Nausenabaugh Booster Pump House and NCB area under GE U - II, Visakhapatnam

Amount

M & L for cleaning of Underground Sump of any Capacity located at various places at any height by removing the inlet and outlet coupling connections, emptying all dirty / muddy water from the tanks using Diesel / Electric Driven Non-Clogging Pumps, removing the Scale / Sludge / Mud / Algae / Vegetation formed including other foreign materials got deposited on sides of walls and bottom of the tanks [Internal and External Surfaces] by scrapping and brushing with wire brush, Cutting / Chipping the spalling concrete surfaces and trimming to receive the epoxy treatment, cleaning with pressure pump, washing with bleaching powder slurry and allowing to dry and then washing, cleaning with acid based material, corrosion inhibitors and dispersing agents and finally cleaning the tank with fresh water, replacement of unserviceable / defective inlet and outlet coupling and fittings etc. complete after completion all the comprehensive repairs and disposal and depositing the demolished material out of MD land complete all as specified and as directed.

M & L for removing any undulations and bituminous traces, trimming, cleaning and washing the surfaces of any thickness to receive Impervious Layer / Guniting and providing an Impervious Layer / Guniting using Spray applied Mixture of Polymer based Ready-Mixed Powder with reduced rebound with water, sand and cement, having Fresh Wet Density of 2140 KG/Cu.m, Compressive Strength greater than 25 Mpa @ 28 Days complete as per the manufacturer’s instructions using pressure Guniting Machine for averaging 25-30mm thick at a pressure of 20 to 30 N/Sq.mm, covering of entire surface, finishing the top surface even and smooth without using extra cement conforming to proper geometrics complete all as per Manufacturer's Instructions and Data Sheet and disposal and depositing the demolished material out of MD land complete all as specified and as directed. Note: The nozzle shall be kept at a distance of about 750 mm to 850 mm from the surface to be treated and the velocity of nozzle shall vary from 120 to 160 Metres / Seconds. Make: M/s. Sika India Pvt. Ltd. / M/s. Fosroc Chemicals India [P] Ltd. / M/s. Choksey Chemicals Pvt. Ltd. / M/s. STP Ltd. / M/s. Bostik India Pvt. Ltd. / M/s. Thermax Ltd. / M/s. Hindcon Chemical Ltd.

M & L for applying Single Component Cementitious Corrosion Inhibiting Primer [Blend of Portland Cements, Graded Fillers, Corrosion Inhibiting Additive and Re-Dispersible Polymers in Powder form] duly mixed with water to make slurry to steel reinforcement by brush to cover all the exposed / visible reinforcement surfaces to form a continuous film not less than 1mm thick @ 2 KG / Sq.m / 1 mm Thick, and preparing the surface to receive concept of epoxy grout mortar including providing necessary props, bracing and runners to relieve the members from the load coming on it including scaffolding with working platform as required and as per design and pattern including preparing the surface to match with the existing surface complete all as per Manufacturer's Instructions and Data Sheet, all as specified and as directed. Note: The product shall have the following Characteristics: [a] Adhesion Bond Strength to Steel : 1 Mpa [b] Pot Life : 30 Minutes @ 30ºC [c] Touch Dry Time : 10-15 Minutes @ 30ºC [d] Mixture Density : 2.01-2.05. [e] Water / Powder Ratio by Weight : 0.3 Make: M/s. Sika India Pvt. Ltd. / M/s. Fosroc Chemicals India [P] Ltd. / M/s. Choksey Chemicals Pvt. Ltd. / M/s. STP Ltd. / M/s. Bostik India Pvt. Ltd. / M/s. Thermax Ltd. / M/s. Hindcon Chemical Ltd.

M & L for providing Crack Sealing Cementitious material in powder form, white coloured, suitable for easy application, finished or smoothened off with a putty blade or a damp sponge and also suitable for application of common paints / coatings including cutting grooves of size not less than 6mm X 6mm complete all as per Manufacturer's Instructions and Data Sheet, all as specified and as directed. Note: The product shall have the following Characteristics: [a] Setting Time : 15 Minutes [b] Compressive Strength @ 7 Days : 22 Mpa as per ASTM C 109 [c] Mixing Ratio : 1:2.5 [Water : Powder] Make: M/s. Sika India Pvt. Ltd. / M/s. Fosroc Chemicals India [P] Ltd. / M/s. Choksey Chemicals Pvt. Ltd. / M/s. STP Ltd. / M/s. Bostik India Pvt. Ltd. / M/s. Thermax Ltd. / M/s. Hindcon Chemical Ltd.

M & L for applying 2 Coats of Elastoplastic Coating modified with special additives mixed with water using heavy duty slow speed drill to form a uniform coating after curing with limited thickness to make the surface resistant to penetration of water to achieve compressive strength of 36 N/mm in 3 Days, Adhesion Bond Strength of 8.2 N/mm including preparation of surface to remove loose dust, cleaning complete all as per Manufacturer's Instructions and Data Sheet, all as specified and as directed. Make: M/s. Sika India Pvt. Ltd. / M/s. Fosroc Chemicals India [P] Ltd. / M/s. Choksey Chemicals Pvt. Ltd. / M/s. STP Ltd. / M/s. Bostik India Pvt. Ltd. / M/s. Thermax Ltd. / M/s. Hindcon Chemical Ltd.

M & L for applying High Strength Epoxy Resin Based Injection Grouting with Automatic NRV packers in all columns and beams from all accessible sides at 500mm centre to centre in matrix pattern until entire area is submerged in dampness of chemical Injection grouting using Two Component Grouting Polymer having low viscosity, high molecular weight, thermosetting to reach very deep pores, voids, cracks and honeycomb in the concrete by B/4 Ford Cup and having curing time of 30-90 Minutes by suitable Gun/Pump at a pressure of 100 Bar to 150 Bar, including cutting of nipples after curing etc. and sealing the nozzles with epoxy putty and preparing the surface to match with the existing surfaces complete all as per Manufacturer's Instructions and Data Sheet, all as specified and as directed. Note: The product shall have the following Characteristics: [a] Compressive Strength : > 50 MPa @ 24 Hours & > 80 Mpa @ 7 Days [b] Tensile Strength @ 7 Days : > 26 MPa [c] Flexural Strength : > 45Mpa [d] Pot Life : 1 Hour @ 20ºC [e] Specific Gravity : 0.95, [f] pH : 2-4, [g] Viscosity : 20-25 Seconds Make: M/s. Sika India Pvt. Ltd. / M/s. Fosroc Chemicals India [P] Ltd. / M/s. Choksey Chemicals Pvt. Ltd. / M/s. STP Ltd. / M/s. Bostik India Pvt. Ltd. / M/s. Thermax Ltd. / M/s. Hindcon Chemical Ltd.

M & L for applying Water Based Paraffin Wax Emulsion Compound complying with ASTM C309-90 by spraying on the surface to promote cement hydration and to reduce shrinkage and to increase durability complete all as per Manufacturer's Instructions and Data Sheet, all as specified and as directed. Note: The product shall have the following Characteristics: [a] Relative Density : 0.99 ~ 1.02 KG/Litre @ 25ºC [b] Specific Gravity : 1.02 [c] Minimum Application Temperature : 10°C Make: M/s. Sika India Pvt. Ltd. / M/s. Fosroc Chemicals India [P] Ltd. / M/s. Choksey Chemicals Pvt. Ltd. / M/s. STP Ltd. / M/s. Bostik India Pvt. Ltd. / M/s. Thermax Ltd. / M/s. Hindcon Chemical Ltd.

M & L for Cleaning / Preparation of the existing exposed reinforcement of Slab, Beam, Column, Walls, Chajjas, Parapets, etc. and any other RCC Structural members free from dust, loose material, surface contamination, rust, scale, mortar, concrete, other loose and deleterious materials by emery paper, wire brush and finally with dry cloth, and washed thoroughly with clean water, making substrata to Saturated Surface Dry and applying Rust Remover made of One Part Alkaline Based Material with Corrosion Inhibitors and Dispersing Agents, supplied as a clear brown solution, having Specific Gravity of 1.2-1.22, pH Value of 9.5-10, suitable to penetrate oil and grease, applied by brush to all accessible parts of exposed rusted metal surface @ 5 to 6 Sq.m per Litres and allowed to react with the chemical for 16-24 hours and the surface shall be again wire brushed to remove any leftover loose particles and finally the surface shall be thoroughly cleaned with clean water complete all as per Manufacturer's Instructions and Data Sheet, all as specified and as directed. Make: M/s. Sika India Pvt. Ltd. / M/s. Fosroc Chemicals India [P] Ltd. / M/s. Choksey Chemicals Pvt. Ltd. / M/s. STP Ltd. / M/s. Bostik India Pvt. Ltd. / M/s. Thermax Ltd. / M/s. Hindcon Chemical Ltd.

M & L for applying thoroughly Water based Aliphatic Acrylate Anti-Carbonation coating Co-Polymer Emulsion over exposed concrete or masonry surfaces @ 5 Sq.m / Litre / 2 Coats, having high performance, excellent crack bridging ability and shall bridge cracks up to 2 mm width, UV Resistant, algae and fungus resistant, Aliphatic Acrylate to give resistance to long term weathering, having resistance to aggressive elements like efflorescence and lime blooming, good adhesion on all cement plasters, capable for hide surface undulations and fine surface cracks including preparation of surface, cleaning of dust, dirt etc. complete all as per Manufacturer's Instructions and Data Sheet, all as specified and as directed. Note: The product shall have the following Characteristics: [a] Elongation at Break : 220% [b] Tensile Strength : 0.7 MPa [c] Hardness : Shore "A" Scale of 80 [d] Adhesion Strength : 3.4 Mpa [e] Water Vapour Permeability : 40 Grams / Sq.m / Day [f] Coating Application Temperature : above 5°C and below 45°C Make: M/s. Sika India Pvt. Ltd. / M/s. Fosroc Chemicals India [P] Ltd. / M/s. Choksey Chemicals Pvt. Ltd. / M/s. STP Ltd. / M/s. Bostik India Pvt. Ltd. / M/s. Thermax Ltd. / M/s. Hindcon Chemical Ltd.

M & L for applying thoroughly Water based Co-Polymer Emulsion [Supplied as Single Component White Liquid] over concrete or masonry surfaces @ 8-10 Sq.m / Litre / Coat, having high performance with Specific Gravity up to 1.02, Touch Dry Time of 1 – 2 Hours @ 30ºC, formulated to be applied at maximum temperature of 30ºC, to achieve specific performance characteristics that shall dry to form a transparent finish to exposed concrete or masonry surface and shall have excellent water retention and excellent penetration into the substrate there by providing the best adhesion including preparation of surface, cleaning of dust, dirt etc. complete all as per Manufacturer's Instructions and Data Sheet, all as specified and as directed. Note: Substrate shall have sufficient strength to receive the top coating. Any defects in the substrate like surface undulations, cracks, pin holes etc., shall be rectified/filled before starting application. Make: M/s. Sika India Pvt. Ltd. / M/s. Fosroc Chemicals India [P] Ltd. / M/s. Choksey Chemicals Pvt. Ltd. / M/s. STP Ltd. / M/s. Bostik India Pvt. Ltd. / M/s. Thermax Ltd. / M/s. Hindcon Chemical Ltd.

M & L for applying Two Coats of 200 Microns DFT using Thixotropic Epoxy Protective Coating using 2 Part Non-Toxic Solvent Free Epoxy Resin Coating, having 100% Solid Contents, approved by CFTRI [USFDA-175.300] with High Chemical Resistance on the water retaining portion and complies to ASTM D 2370 etc, Non-Toxic Cured Film shall meet the requirements as per IS – 9883, the coating shall be applied with a suitable stiff nylon brush on the cured and prepared surface [Remove loose dust, dirt etc. cleaning] by mixing the chemical with slow speed electric drill complete all as per as per Manufacturer's Instructions and Data Sheet, all as specified and as directed. Make: M/s. Sika India Pvt. Ltd. / M/s. Fosroc Chemicals India [P] Ltd. / M/s. Choksey Chemicals Pvt. Ltd. / M/s. STP Ltd. / M/s. Bostik India Pvt. Ltd. / M/s. Thermax Ltd. / M/s. Hindcon Chemical Ltd.

M & L for applying Single Component Cement Based Free Flowing Grout with 10 mm washed aggregates, the grout shall be non shrink type and a positive expansion of up to min 1 % in the plastic state and a flowability of 3 metres at a head of 250 mm for a gap width of 50 mm and shall develop a Compressive Strength of 25 MPa @ 24 Hours, 60 MPa @ 28 days, Flexural Strength of Minimum 10 Mpa, Bond Strength of 10 MPa, shall not bleed or segregate and having a minimum pot life of 20 minutes, chloride free, creep resistant, the grout shall have resistance to dynamic loads and specimens shall not get damaged /cracked on being subjected to alternate loads of 5 MPa to 25 MPa @ 500 Cycles per minute for minimum 2 Mio cycles with epoxy bonding agent having Mix Density of 1.45 to 1.5 KG / Litre, having Compressive Strength [BS-6319 PT 3] of 40 MPa @ 7 Days, Bond Strength [ASTM- C 881] of 11 MPa @ 7 Days having an overlay time of 3 Hours at 30ºC including pouring cementitious grout into suitable formwork using suitable arrangement or if required with suitable pumping device and removing bottom shuttering after 7 days, ensuring proper bond between the cementitious grout and existing concrete substrate etc. including all tools and tackles complete all as per Manufacturer's Instructions and Data Sheet, all as specified and as directed. Make: M/s. Sika India Pvt. Ltd. / M/s. Fosroc Chemicals India [P] Ltd. / M/s. Choksey Chemicals Pvt. Ltd. / M/s. STP Ltd. / M/s. Bostik India Pvt. Ltd. / M/s. Thermax Ltd. / M/s. Hindcon Chemical Ltd.

M & L for applying Two Component Solvent Free Resin Based agent having mixed density of 1.45 – 1.50 KG/Litre, rendering full hardness in 24 Hours complete all as per Manufacturer's Instructions and Data Sheet, all as specified and as directed. Note: The product shall have the following Characteristics: [a] Compressive Strength @ 7 Days : > 40 MPa [b] Tensile Strength @ 7 Days : > 15 MPa [c] Flexural Strength : > 25 Mpa [d] Bond Strength : > 11 MPa Make: M/s. Sika India Pvt. Ltd. / M/s. Fosroc Chemicals India [P] Ltd. / M/s. Choksey Chemicals Pvt. Ltd. / M/s. STP Ltd. / M/s. Bostik India Pvt. Ltd. / M/s. Thermax Ltd. / M/s. Hindcon Chemical Ltd.

M & L for Welded Steel Wire Fabric / Expanded Metal of weight not exceeding 1 Kg per Sq.m, lathing to cleaned and prepared Concrete surfaces etc. including all laps, cutting and wastage complete all as specified and as directed.

M & L for Use and removal of steel formwork to sides of Pillars, Posts, Struts, Columns, Stanchions of any shape / cross section, sides and soffits of Floor or Roof Beams, Beam Haunchings, Girders, Bressummers, Lintels, Cantilevers, Shelves including supports, overhangs, etc, splays between floors and beams and similar works, soffits of suspended slabs such as Roof Slabs, Floor Slabs, Landings and similar work [horizontal or sloping], Plain / Curved faces of Walls, Retaining Walls, Parapets and Staircase Railings and similar work including attached Pilasters, Buttresses, etc. vertical or to batter, Fins, Louvers, Fascia, Chullah hoods, Chajjas, Troughs and similar items including edges and similar works for fair finished surfaces of concrete complete all as specified and as directed.

S & F Reinforcement using High Strength Corrosion Resistant Deformed TMT Bars of Grade Fe–500D of 8mm dia and over, cut to length, bent to shape required including cranking, bending, spirally for hooping, hooking ends and binding with annealed mild steel wire not less than 0.9mm dia or securing with clips or welded complete all as specified and as directed.

Note for Serial Item No. 1 to 17: [a] 06 Nos. of Photographs of Underground Sumps before and after Cleaning & Comprehensive Repairs shall be submitted to GE for record before claiming payment. [b] Sample testing of every Underground Sumps before and after Cleaning & Comprehensive Repairs from NABL Accredited Laboratory for Microbial parameters of water shall be submitted to GE for record before claiming payment. [c] The work shall be executed directly by the Manufacturer or their authorised applicator. The contractor shall obtain a written guarantee for the effectiveness of the Comprehensive Repairs carried out to the Underground Sumps from the manufacturer shall be submitted to GE for record before claiming payment. The manufacturer shall also certify that the Comprehensive Repairs of the Underground Sumps have been carried as per the standard engineering practices and also certify the strength and serviceability of the Underground Sumps. [d] The rate quoted for respective items shall be deemed to be inclusive of all material, labour, expert supervision, Tools, Plant, Safety measures like safety belts, ropes, helmets, netting etc. required to work at any height as per site requirement and providing double scaffolding and as required and removal of the same on completion of the comprehensive repairs and disposal and depositing the demolished material out of MD land complete all as specified and as directed.

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