GENERAL-Urgent Repair works to Ponniam Bridge-in Kannur district-General Civil Work

OD233543/2025-2026:Engaging coolie for petty works etc. where skilled labours are not essential

12.1.B.1:Earth work in excavation of foundation of structures as per drawing and technical specification, including setting out, construction of shoring and bracing, removal of stumps and other deleterious matter, dressing of sides and bottom and backfilling with approved material. Ordinary Soil - Depth upto 3m - Mechanical Means

12.4:Plain cement concrete 1:3:6 nominal mix in foundation with crushed stone aggregate 40 mm nominal size mechanically mixed, placed in foundation and compacted by vibration including curing for 14 days.

12.8.1.C.1:Plain/Reinforced Cement Concrete in Open Foundation complete as per Drawing and Technical Specifications RCC Grade M20 - Using Concrete Mixer

OD233539/2025-2026:providing MS grill platform over MS pipe posts of size 40 mm dia. 6 M long, frames errected including all labour and higher charges for fixing and laying the platform including removal of entire platform after completion of the work.

OD233538/2025-2026:Chipping and spalling / defective concrete and exposing the defective/ corroded reinforcement of the ceiling ,join the additional bar wherever 1/3 diameter of the barr 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 hire charges of tools etc.complete.

OD233541/2025-2026: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.

OD233540/2025-2026: 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.

OD233537/2025-2026: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 rusted matal 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.