Tender For General-Urgent Repair Works To Kanichar Bridge -1-.-General Civil Work - Dismantling of existing structures like culverts, bridges, retaining walls and other structure comprising of masonry, cement concrete, wood work, steel work, including T&P and scaffolding wherever necessary, sorting the dismantled material, disposal of unserviceable material and stacking the serviceable material with all lifts and lead of 1000 metresPrestressed / Reinforced cement concrete grade M-20 & above. - By Manual Means 3 14.7:Construction of RCC railing of M30 Grade in-situ with 20 mm nominal size aggregate, true to line and grade, tolerance of vertical RCC post not to exceed 1 in 500, center to center spacing between vertical post not to exceed 2000 mm, leaving adequate space between vertical post for expansion, complete as per approved drawings and technical specifications. 4 OD59898/2025-2026:Chipping and spalling / defective concrete and exposing the defective/ corroded reinforcement of the ceiling ,join the additional bar wherever 1/3diameter of thebarr is corroded.Removal of the defective concrete across the bar should be at least 2mm beyond the defective bar so that the reinforcing bar can be cleaned with emery ribbon , wire brush etc.After cleaning the bar wash the bar wash with clean water and collected spalled / fallen concrete .Measurement is calculated for whole exposed area.Including cost of materials,labour charges ,conveyance of materials to site hirecharges of tools etc.complete. 5 OD59897/2025-2026: Anti Corrosive treatment to Steel: Providing & applying inhibition coats/system to exposed reinforcement bars & also new bars, after cleaning & removing scales and rust completely as specified in 1.4, Two component inhibitor Nitozinc Primer std. of Fosroc or MasterEmaco P130 of BASF or equivalent having specific gravity of 1.75 and solid content 57(+/-3) Adhesive bond strength > 1.5 N/mm2, 40 microns DFT per coat as approved by Engineer-in-charge and/or Consultant shall be used as per manufacturer?s specification in two coats at all heights, including all material, labour, tools, temporary supports for structures, electricity, plant and machineries, necessary surface preparation and necessary protection after and during work. The concrete surface area contianing the rebars where the treatment is carried out shall be considered for measurement. 6 OD59899/2025-2026:Rust remover/ Rust converter: Cleaning of rust /scales/corrosion from reinforcement bars should be carried out uing acid based rust remover, Reebakleens RR of Fosroc or equivalent , or using alkali based rust converters such as Feovert of Krishna Conchem . The material is to be applied to the rustedmatal bar, using brush and living it to dry for 30 Min & washing surface with fresh water as required to exposed reinforcement bar at all heights , including all material , labour tools ,temporary supports for structures , electricity ,plant and machineries complete as per detail specification and as directed by Engineer -in -charge and / or Consultant. The concrete surface area containing the cleaned rebars shal be measured for payment. 7 OD59896/2025-2026:Polymer Modified Mortar (Pre-Packed): Providing and Applying single component,high strength, fibre reinforced, thixotropic cementitious patch repair mortar that achieves compressive strength minimum of 15 MPa at 1 day and 45 MPa at 28 days and capable of applying upto 50mm thick in single layer such as Renderoc SP40 of Fosroc or Master Emaco S 348 of BASF or equivalent, to the prepared concrete area for thickness up to 50mm, after applying epoxy resin based bonding coat as per manufacturer?s specification, before the bonding agent becomes tack free, initially by hand and finally finishing the same with trowel carefully compacting the same around the rebar and finishing to bring it in line with existing concrete surface on the columns, slabs, beam etc. at all heights, where the thickness of application is less than 50 mm in patches as per specification . Item rate is inclusive of all material including the bond coat, labour, tools, temporary supports for structures, electricity, plant and machineries, curing etc. complete and as directed by Engineer-in-charge and/or consultant. 8 14.2:Supplying, fitting and placing HYSD bar reinforcement in super-structure complete as per drawing and technical specifications 9 55.26a:Providing and applying elastic, elastomeric membrane forming system with anticarbonation and breathing properties. The system should be based on solvent free acrylic polymers with selected mineral fillers and should be ultra-violet resistant, crack bridging type, carbonation resistant, breathable, enviornment friendly, water proofing coating. For anticarbonation, equivalent air layer thickness denoted as R or SD CO2 grater than 50 m and for breathability equivalent air layer thickness denoted as SD H2O shall be less than 4 m for vapour transmitting barrier. The system consists of one coat primer @ 75- 100 g/m2. The consumption of main polymer coating to give film thickness of 200-225 microns (Solid contents- 70%+ -3%) should be approximately. 400-450 g/m2 per two coats depending upon the method of application (either by roller or brush) and surface smoothness of the concrete. The total dry film thickness of the coating system should be minimum 200 microns for the above system. Polymer coating should be in suitable approved shades, including cost of materials, cleaning, chipping and removing the dirt particles of the concrete slab with wire brush and water,labour charges for filling the bug holes, cracks, joints etc with one component polymer modified fine repair and cosmetic mortar, labour for applying the above coating, scaffolding charges,etc. complete as per IRC SP:80 Clause 6.5.1 and Clause 2808 in the Specifications Book for Roads & Bridges published by the Ministry during April 2013.
