SPL REPAIR TO ROOF OF CERTAIN BUILDINGS AT AF STATION TAMBARAM

Demolition of cement concrete (unreinforced) of any description and in any position as in sunken slabs, existing roof treatment any position complete all as specified and as directed.

M&L for providing cement concrete type B0 1:2:4 (12.5mm graded stone aggregate) as in padding and benching & filletting complete all as specified and directed.

M&L screed bed or bedding layer 10 mm thick CM 1:4 for laying floor finishes finished even and smooth without using extra cement with IWPC (IWPC measured separately) as in roof slabs / brick/concrete/masonry or in chajjas/parapet walls complete all as specified and directed.

Supply only Liquid water proofing compound as directed by Engr-in-Charge

PRIMARY CLEANING ACTIVITIES : The entire floor area chipping and removing loose mortar & dust particles until to reach sound surface by using mechanical or manual tools and attending the cracks , holes like as weak points by using STP materials . TREATMENT OF HUNCH SURFACE :Providing and Laying polymer concrete by adding crystalline internal membrane admixtures by the ratio of (1 bag cement = 500gms crystalline admixtures ) making hunch surface 100mm x 100mm of floor & wall joint area. SECONDARY SURFACE CLEANING WORK - The surface to be cleaned free from oil grease,wax,dust and other barrier materials. WATER PROOFING PU COATING : The entire area applied primer as a base layer and over the top placing Fiber mesh & applied entire floor & around wall 1 ft area two coats of water based, UV resistant Elastomeric PU liquid membrane waterproofing coating with required time intervals by using brand ShaliUrethane-BTD. 1. Dilute ShaliUrethane® BTD with water @ 1:1 ratio and use as primer @ 400 gm / m². 2. Apply 1st coat of ShaliUrethane® BTD @ 1 kg (or 0.8 kg) / m² by brush / roller / airless spray while the primed surface is tacky. For faster and smoother application, apply with airless gun. 3. Spread Non-woven Geo-textile fabric or Fiber Glass Tissue / scrimp of 45 GSM with overlaps of 50 mm in both directions when the surface is still tacky; this is optional, to be assessed as per site requirements to achieve higher mechanical properties 4. Apply 2nd coat of ShaliUrethane® BTD @ 1 kg (or 0.8 kg) / m² by brush / roller / airless spray for final DFT of 1200 micron in two coats (for 1000 microns DFT apply 0.825 kg / m² / coat).

Taking down cracked loose plastering of highly deteriorated portion of RCC beams, pillars, chajjas, slab and lintels including cleaning the reinforcement bars of any size by scapping and removing rust by using rust remover and applying epoxy based anti corrosive coating of Zinc Rich primer and applying bonding agent of Boscocem 475 SBR latex on the surface of old concrete as per manufacturers recommendation, recasting RCC members with cement concrete type A0 1:1.5:3 using 12.5 mm graded stone aggregate mixed with acrylic latex based additive of Hydroment 476 @ 10 ltrs per 50 kg of cement including finishing matching with existing finishes all rendering 10 mm thick over concrete surfaces in cement mortar 1:3 including application of three coats of white wash/ Oil Bound Distemper/ Colour wash after preparation of surface or the proportion recommended by the manufacturers including all necessary formwork all as directed at site. Note : Replacement of reinforcement where necessary before recasting RCC reinforcement shall be measured and paid seperately. However the cost factor towards sacffolding etc for carrying out these items of work at various heights upto 12 Mtr shall deemed to be included in this item. Approved agency - Bostik, STP, SIKKA

Supply and application of Drilling and fixing injection packer and grout the Low viscous epoxy injection Resin Grout system of LVEP by using electrical operation Pump all as specified and directed by Engr-in-Charge. Note : For Beam and column area Drilling and fixing the Injection Packers and mixing and inject the two components (comp ‘A’ and comp ‘B’) Low viscosity Injection Material with electrical operation pump. Approved agency - Bostik, STP, SIKKA

Taking down old cement plaster of any description,any thickness from external surfaces of walls/soffits etc including racking out joint hacking for keys and scrubbing down with water etc complete all as specified and as directed.

M & L for rendering 15mm thick in cement mortor 1:4 on Brick wall surfaces, finished even and smooth without using extra cement with @ at 3% IWPC (IWPC measured separately) complete all as specified and directed.

Material & Labour for applying one coat of alkali resistant priming paint and over of primer applyig two or more coats of 100% Premium acrylic emulsion paint having VOC less than 50 gm/litre and UV resistance as per IS 15489:2004, Alkali & fungal resistance, dirt resistance exterior paint of required shade (Company Depot Tinted) with silicon additives @ 1.43 litre/ 10 sqm over and including priming coat of exterior primer applied @ 0.90 litre/ 10 sqm over new surfaces. etc as per existing or as approved tint/colour complete all as specified and as directed.