Emergent repair of few columns of passage Infront of College Canteen of NBMCH in the district of Darjeeling

Cleaning the concrete surface by removing dirt and debris, marking defective locations and removing loose concrete by careful stripping untill hard surface is exposed, cutting the concrete to regular shape, wire brushing the exposed surface and removing debris from site complete as per direction of the Engineer - in - Charge.

Cleaning the exposed reinforcement preferably upto full diameter by wire brush, applying two coats of polymer based rust removing compound left for 24 hours, removing the coating and then applying two (2) coats of polymer modified anti corrosive protective coating formulated to inhibit the corrosion of reinforcement as per manufacturer's specification][Mode of measurement:The affected surface area of reinforcement shall be considered for payment]

Applying epoxy based reactive joining agent for joining the old concrete with fresh concrete to be applied within manufacturer's specified time as per manufacturers specification. (0.4 Kg / m² of concrete surface)

Welding in M.S. structural work with gas or electric: (a) Tack weld

Reinforcement for reinforced concrete work in all sorts of structures including distribution bars, stirrups, binders etc initial straightening and removal of loose rust (if necessary), cutting to requisite length, hooking and bending to correct shape, placing in proper position and binding with 16 gauge black annealed wire at every intersection, complete as per drawing and direction. (a) For works in foundation,basement and upto roof of ground floor/upto 4 m (i) Tor steel/Mild steel I. SAIL/TATA/RINL

Supplying and application of chemical for post installed rebar connection by using ETA approved for seismic criteria In rebar connection, Including drill/ng.12 hole to the required depth by rotary hammer drill, cleoning with brush & jet of clean air,/ill/ng chemical using serrated noule to eliminate mixing error and in a voldless manner including charges for all tools & plants. Application to be designed for post Installed rebars as per ECZ/TR023 or relevant tested i) Cost of post installed rebaring application with chemical as specified for 8 mm dia per cm of depth and accepted design guidelines and the design document to be furnished by the manufacturer. The installation Superintending Engineer 0/the respective circle and Injection process should and the setting instructions should be strictly followed as per manufacturer's specl/ications as approved by EIC prior to drill/ng along with post. Installed rebar embedment design report. The existing concrete member should be scanned using rebar scanner to avoid hitting existing reinforcement in concrete during drilling. Notes: 1) This rate is excluding the cost of scaffolding. 2) This work should not be excuted without specific permission of be executed in the presence of officer not below the rank of Assistant Engineer to supervise the the work minutely. 3) Rebar grouting is specifically required for extension and strengthening purpose of old or existing RCC structural members with new RCC structural members through rebar fixing chemical Item without breaking beam, coloumn, roof slab, lintel, ceilling etc) (i) Cost of post installed rebaring application with chemical as specified for 8 mm dia per cm of depth

Sealing of crack / porous concrete with Epoxy Grout by injection through nipples complete as per clause 2803.1.

Providing and inserting nipples with approved fixing compound after drilling holes for grouting as per Technical specifications including subsequent cutting/removal and sealing of the hole as necessary of nipples after completion of grouting with Cement/Epoxy.

Plaster (to wall, floor, ceiling etc.) with sand and cement mortar including rounding off or chamfering corners as directed and raking out joints including throating, nosing and drip course, scaffolding/staging where necessary (Ground floor).[Excluding cost of chipping over concrete surface] (i) With 1:6 cement mortar (b) 20 mm thick plaster In ground floor

Acrylic Distemper to interior wall, ceiling with a coat of solvent based interior grade acrylic primer (as per manufacturer's specification) including cleaning and smoothning of surface. Two Coats

Applying Exterior grade Acrylic primer of approved quality and brand on plastered or cencrete surface old or new surface to receive decorative textured (matt finish) or smooth finish acrylic exterior emulsion paint including scraping and preparing the surface throughly, complete as per manufacturer's specification and as per direction of the EIC. (b) Two Coat, In Ground Floor:

Protective and Decorative Acrylic exterior emulsion paint of approved quality, as per manufacturer's specification and as per direction of Engineer-in-Charge to be applied over acrylic primer as required. The rate includes cost of material, labour, scaffolding and all incidental charges but excluding the cost of primer. In Ground floor (Two Coat) a) Normal Acrylic Emulsion In ground floor

Dismantling all types of plain cement concrete works, stacking serviceable materials at site and removing rubbish as directed within a lead of 75 m. In ground floor including roof. (a) upto 150 mm. Thick

Ordinary Cement concrete (mix 1:1.5:3) with graded stone chips (20 mm nominal size) excluding shuttering and reinforcement if any, in ground floor as per relevant IS codes. (i) Pakur Variety

Hire and labour charges for shuttering with centering and necessary staging upto 4 m using approved stout props and thick hard wood planks of approved thickness with required bracing for concrete slabs, beams and columns, lintels curved or straight including fitting, fixing and striking out after completion of works (upto roof of ground floor) (c) Steel shuttering or 9 to 12 mm thick approved quality ply board shuttering in any concrete work

Supplying, preparing and placement of ready mix non shrink cementious mocroconerete having no metalic aggregate of chlorides for repairing and jackting of damaged RCC members.The micro concrete should achievea compressive strength not less than 10 Mpa after 24 hours, 40 Mpa after 7 days and 50 Mpa after 28 days at 300c. It should have unrestrained expansion in between 1 to 4% flexural strength shall not be less than 5 Mpa after 28 days. Micro concrete should have a co-efficient of thermal expansion similar to that of the host concrete.

Labour for propping up overhead members as a precautionary measure against falling as directed with necessary planks, Eucalyptus props, packing nails, wire ropes, iron wires etc. including hire charges of all materials fitting, fixing dismantling and removing the props etc and all ancillary works in this connection complete.

Add 18% GSTC

Add 1% LWC

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