Biennial contract for maintenance and renovation of office building, main plant buildings, roads and external civil infrastructure related work at plant site for year 2025-2027 at RR Site, unit - 7and8.

Earthwork in excavation in all types of ground substrata consisting of hard rock / fragmented rock / soft rock / ordinary soils / filled up ground / murrum requiring use of rock breaker, drilling, chiseling with mechanical / manual means etc. up to a depth of 1.5 m from the original ground level and dewatering if required for foundation of walls, columns, platforms, Tree pits etc. including backfilling with selected excavated materials in plinth and foundation trenches in layers not exceeding 200 mm thick, watering ramming etc. complete and disposing off the surplus materials to a maximum radially measured lead of 1.0 KM. as per drawings, design , safety and specifications and directions of the Engineer. Note :- Bidders should essentially visit and inspect the construction sites and determine themselves the right and safest method/s of excavation considering the safety of nearby structures and population, before quoting their item rates (Blasting is not permitted).

Extra for every additional lead of 1Km or part thereof in all kinds of soil.

Extra for every additional lift of 1.5m part thereof in all kinds of soil.

Filling with available excavated earth (excluding rock) in trenches, plinth, sides of foundation etc. in layer not exceeding 200 mm in depth, consolidating each deposited layer by ramming and watering, lead up to 2KM. and lift up to 1.5 m. etc. complete and disposing off the surplus materials to a maximum lead of 1.0 KM. radius as per drawings, design, safety, specifications and as directed by the Engineer.

Providing and laying 150 mm to 230 mm thick stone soling under floors properly hand packed, filling interstices with spalls, gravels and inert fine material and consolidating to required gradient and camber, spreading, watering etc. complete as per drawings, specifications and direction of Engineer.

Providing and laying 230 mm thick R.R. stone pitching using departmental stone including preparation of bed in proper slope and spreading locally available earth over pitching to fill up the gaps as binding material etc. all complete as per drawings, specifications and direction of Engineer.

Providing and laying in position cement concrete of 1:3:6 (1 Cement: 3 coarse Sand : 6 Graded Stone aggregate 20 mm nominal size) -at all level , transporting of concrete to site, laying, consolidation, finishing, curing etc. all complete excluding cost of centering & shuttering, as per direction of Engineer-in-charge.

Providing and laying cement concrete of 1:2:4 ( 1 Cement : 2 Coarse sand : 4 graded stone aggregate 20 mm nominal size) in retaining walls, return walls, walls(any thickness) including attached pilasters, columns, piers, abutments, pillars, posts, struts, buttresses, string or lacing courses, parapets, coping, bed block, anchor block, window sills, fillets etc. at all level including transporting of concrete to site, laying including cost of finishing, curing etc. all complete excluding the cost of centering and shuttering as per specifications and direction of Engineer-in-charge.

Providing and Application of IRONITE NO.3 powder (Metallic Dry shake natural cement colour) @ 6 Kgs/m2 sprinkled over green concrete with 1/3rd of the dry shake to be sprinkled in First pass and floated with Power float, remaining 2/3rd of dry shake to be sprinkled in next pass and the floor laid floated & trowelled to acquire desired finish.

Providing and laying in position machine batched, machine mixed and machine vibrated design mix cement concrete of all grades (M25 to M35 as per site/drawing requirement)) for Reinforced cement concrete or other works using 20mm size stone aggregates including transporting of concrete to site for laying but excluding the cost of centering, shuttering and reinforcement, including cost of finishing, compaction, curing, approved chemical admixtures conforming to IS 9103 in recommended proportions for achieving slump not less than 120mm and water/cement ratio not more than 0.42 at all level & for all sections as per drawings, specifications & direction of Engineer-in-charge. Use of concrete retarding agent / accelerator conforming to IS 9103 shall also be done if situation demands so. Rates should be based on using 350 kg of OPC 43 grade cement per Cum of concrete. (Note: 1) Minimum cement content will be 350kg per cum of concrete. 2) As per design mix submitted by contractor excess than 350kg cement content per cum of concrete will be included in quoted rate and will not be payable separatly.)