Emergent Restoration rehabilitation work of Birendra Sasmal setu over river Kangsabati at ch 118.7 of NH60 under Salboni NHSD of NHDiv-II, PW Rds Dte. in the dist. of Paschim Medinipur on item rate mode using SBD.

Amount

Conducting and completion of Non-Destructive Tests (NDT) (USPV, Core, rebound hammer and carbonation) to assess the actual structural strength of the concrete by providing and supply necessary Plants, Equipments & Machineries and Manpower requried for the tests including submission of report in three sets compelte in all respect as per direction of Engineer-in-charge:-

Rebound Hammer Test

USPV Test

Carbonation Test

Providing fitting & fixing double MS scaffolding system (cup lock type) from the ground/bed level to the height of the bridge super-structure and dismantling of the same complete and removal from site after completion of work as per direction of Engineer-in-charge.

Providing & Fixing of hanging staging with necessary supports system for repair works with Structural steel material complete and removal from site after completion of work as per direction of Engineer-in-charge.

Dismantling of existing structures like culverts, bridges, retaining walls and other structure comprising of masonry, cement concrete, 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 m as per Technical Specifications Clause 202 for Rural Roads of MORD and as per direction of Engineer-in-charge. By Manual Means Cement Concrete.

Uprooting and removing plants from the surface of wall, parapets etc. and making good damages [Repriring of damages to be paid separately] (a) Small plant girth of exposed stem upto 75 mm lift upto 6.00 mtrs. and as per direction of Engineer-in-charge.

Removal of existing cement concrete wearing coat including its disposal complete as per Technical Specification without causing any detrimental effect to any part of the bridge structure and removal of dismantled material with all lifts and lead upto 1000 m (Refference to MoRTH's Specifcation 2811) and as per direction of Engineer-in-charge. Thickness 75 m

Plain/Reinforced cement concrete in super-structure complete all including vibrating and compacting, finishing, curing, sampling, testing etc. by mechanically mixed as per drawing and Technical Specifications (Reference to MORT&H's specifications 1500, 1700 & 2200) and as per direction of Engineer-in-charge. RCC Grade M-25 using Concrete Mixer.

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 Engineer-in-Charge. In Ground Floor. One Coat

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 complete all as per direction of Engineer-in-charge. In ground floor (two coat). Normal Acrylic Emulsion

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.

Drainage Spouts not less than 100 mm dia of corrosive resistance material, spacing not exceeding 10m. Complete as per drawing and Technical specification (Reference to MORT&H's specification- 2705) and as per direction of Engineer-in-charge.

Sealing of crack / porous concrete with Epoxy Grout by injection through nipples complete as per clause 2803.1 (Reference to MORT&H's specification 2803) and as per direction of Engineer-in-charge.

Epoxy bonding of new concrete to old concrete (crack/spalling shall be sealed with epoxy injection/grouting coating of epoxy resin @0.80 kg / sqm should be applied) (Reference to MORT&H's specification 2805) and as per direction of Engineer-in-charge.

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 (Reference to MORT&H's specification 2800) and as per direction of Engineer-in-charge.

Removal of defective concrete, cleaning the surface thoroughly, applying the shotcrete mixture mechanically with compressed air under pressure, comprising of cement, sand, coarse aggregates, water and quick setting compound in the proportion as per clause 2807.1., sand and coarse aggregates conforming to IS: 383 and table 1 of IS: 9012 respectively, water cement ratio ranging from 0.35 to 0.50, density of gunite not less than 2000 kg/cum, strength not less than 25 MPa and workmanship conforming to clause 2807.6 of MoRTH's specification and as per direction of Engineer-in-charge. Average thickness of shotcrete mixture 25 mm to 40 mm.

Applying epoxy mortar over leached, honey combed and spalled concrete surface (@ 20-24 kg of Epoxy mortar /sqm) and exposed steel reinforcement complete as per Technical Specification (Reference to MORT&H's specification 2804) and as per direction of Engineer-in-charge. Thickness of epoxy mortar = 10mm

Supplying & laying 20 mm designer chequered tiles of any shade and of approved quality as per IS:1237:1980 laid in patterns as directed in pavement, footpath including necessary underlay 25 mm thick average cement mortar (1:3) complete in all respect with all labour and materials [using cement slurry @ 4.4 kg./sq.m at back side of tiles and as per direction of Engineer-in-charge. Cement of mortar & slurry will be supplied by the Department. Border concrete if necessary to be paid separately]

Providing and placing high strength, non shrink pre-packed free flow micro concrete (location as per direction of Engineer-in-charge) having compressive stringth of 60 Mpa at 28 days (compresive strength of one day should not be less than 25 Mpa) as per specification. The mirco concrete mix shall be prepared by mixing non shrink pre-packed free flow micro concrete powder with well graded cleaned crushed, aggregate 10 mm and down (aggregate should be less than 10 mm but retained on 3.36 mm) in proportion of 2:1 (two prt packed micro concrete powder: one part stone aggregate) by weight for repairing excessively damaged area of structure element excluding reinforcement but including scaffolding, entering, fixing water type form work, shuttering, quring inclusive of all labour, materials equipments, etc. complete as per specification and instruction of Engineer-in-Charge. This item includes preparation and submission of mixed design for compressive strength of 60 Mpa at 28 days (Compressive strength of one day should not be less than25 Mpa for approval of Engineer-in-Charge. (Note:- Non shrink prepacked micro concrete powder content consider in this item is 1450 kg/cum, Excess/less micro concrete powder used as per design mix is payable recoverable separately).

Welding by gas / electric plant including transportation of welding plant at site including cutting, forging & drilling to required shape and as per direction of Engineer-in-charge.

Supplying, binding, fixing etc. including initial straightening, cutting to requisite length, hooking and bending to correct shape, placing in proper postion of uncoated HYSD reinforcement bar in super-tructure complete as per drawing and technical specifications (Reference to MORT&H's specification 1600) and as per direction of Engineer-in-charge.

Providing and laying of a strip seal expansion joint catering to maximum horizontal movement upto 80 mm manufactured by MORT&H ,GOI Approved/Empanelled manufacturer and complete as per approved drawings and standard specifications to be installed by the manufacturer/supplier or their authorised representative ensuring compliance to the manufacturer's instructions for installation (Reference to MORT&H's specification 2606) and as per direction of Engineer-in-charge.

Providingandlaying Filter material underneath pitching in slopes complete as per drawing and Technical specification Gradation of filter,Thickness of filter 200/300 mm (Reference to MORT&H's specification 2504) and as per direction of Engineer-in-charge.

Providing and laying Pitching on slopes laid over prepared filter media including boulder apron laid dry infront of embankment complete as per drawing and Technical specifications (Reference to MORT&H's specification 2504) and as per direction of Engineer-in-charge. Cement Concrete Blocks of size 0.3x0.3 x0.3 m cast in cement concrete of Grade M15

Cold Milling of Bituminous Pavement surface upto the required depth by mechanical means using milling machine, without disturbing the under lying layers, to proper line and level, cleaning the surface properly after milling and removing the loose materials, stacking the milled materials for re-use, necessary guarding, barricading & lighting, including hire charges of machinery, cost of fuel and labour and other incidental charges all complete and as per direction of Engineer-in-Charge. Depth upto 100 mm

Providing and applying tack coat with Cationic bitumen emulsion (RS1) complying with IS:8887 using emulsion pressure distributor on the prepared bituminous / granular / cement concrete pavement surface cleaned with mechanical broom and high pressure air jet (Reference to MORT&H's specification clause 503) and as per direction of Engineer-in-charge. On Bituminous Surface @ 0.25 kg/sqm.

Providing and laying dense graded bituminous macadam with 100-120 TPH batch type HMP using crushed aggregates of specified grading, premixed with bituminous binder of approved grade @4.0% (min) for Grading-1 and 4.5% (min) forGrading-2 by weight of total mix and filler (Cement/hydrated lime/Rockdust) as per table 500-10 and mix design done as per table 500-11 and job mix formulas per clause 505.3.3 transporting the hot mix to work site, laying with a hydrostatic paver finisher with sensor control to the required grade, level and alignment, rolling with smooth wheeled, vibratory tandem roller and with pneumatic tyre roller of 12 to 15 ton new eight with a pressure atleast 0.56 MPa as directed by E-I-C, and to achieve the desired compaction as per MORT&H specification clause No. 505.3.5 complete in all respects (Reference to MORT&H's specification clause 505). 50 mm thick Grading-II.

Providing and laying 30 mm thick mastic asphalt wearing course with approved grade bitumen meeting the requirements given in table 500-39, prepared by using mastic cooker and laid to re quired level and slope after cleaning the surface, including providing antiskid surface with bitumen precoated fine-grained hard stone chipping of 13.2 mm nominal size at the rate of 0.005 cum per 10 sqm and at an approximate spacing of 10 cm center to center in both directions, pressed in to surface when the temperature of surfaces is not less than 100°C, protruding 1mm to 4mm over mastic surface, all complete as per clause 516 (Reference to MORT&H's specification clause 516 along with IRC:107) and as per direction of Engineer-in-charge.

Providing anti-corrosive protective coating to inhibit the corrosion to HYSD reinforcements including two coats of anti-corrosive coatings of consumption as per manufacturer's specification, cleaning etc. complete as per the direction of the Engineer-in-Charge.

Providing and erecting a "W" metal beam crash barrier comprising of 3mm thick corrugated sheet metal beam rail, 70 cm above road/ground level, fixed on ISMC series channel vertical post, 150 x 75 x5 mm spaced 2 m centre to centre, 1.8 m high, 1.1 m below ground/road level, all steel parts and fitments to be galvanised by hot dipprocess, all fittings to conform to IS:1367and IS:1364, metal beam rail to be fixed on the vertical post with a spacer of channel section 150x75x5mm, 330 mm long complete as per clause 811 and as per direction of Engineer-in-charge. Type-A.

Rectification of Bearings as per Technical Specifications and as per direction of Engineer-in-charge.

Providing and laying of hot applied thermoplastic compound 2.5mm thick including reflectorising glass beads @250 gms per sqm area, thickness of 2.5mm is exclusive of surface applied glass beads as per IRC:35 (2015). The finished surface to belevel, uniform and free from streaks and holes (Reference to MORT&H's specification 803) and as per direction of Engineer-in-charge.

Supplying & fixing of Raised Pavement Markers/Road Studs/Cats Eye made of poly carbonate moulded body and reflective panels with micro prismatic lens capable of providing total internal reflection of the light entering the lens face which shall support a load of 13635 kg tested in accordance to ASTMD 4280 Type-H and compling to Specifications of Category A of MoR&TH Circular No. RW/NH/33023/10-97-DO III Dt.11.06.1997 & MoRT&H's specification for Road & Bridge Works (Fifth Rev.). Marker height shall not be less than 10 mm and shall not exceed 20 mm, width shall not exceed 130 mm and with minimum reflective area of 13 sqcm on each side and slope to the base shall be 35±5 degree. Fixing will be without nails but by using epoxy resin based adhesive as per manufacturer's recommendation including site clearence etc and complete as directed by the Engineer in Charge. The contractor will have to provide a test certificate from a reputable national/international laboratory comforming the above specifications.

Tubular Steel Railing on Precast RCC Posts,1.2m High Above Ground Level : Providing,fencing and erecting 50 mm dia painted steel piper ailing in 3 rows on precast M20 grade RCC vertical posts 1.8 metres high (1.2 m above GL) with 3 holes 50 mm dia for pipe, fixed 2 metres centre to,complete as per approved drawing (Reference to MORT&H's specification 809) and as per direction of Engineer-in-charge.