Construction of New Apron with Link Taxiways at Port Blair Airport

Amount

Demolishing R.C.C. work manually/ by mechanical means including taken away steel bars and disposal of unserviceable material within 50 metres lead as per direction of Engineer - in- charge.

Demolishing cement concrete manually/ by mechanical means including disposal of material within 50 metres lead as per direction of Engineer - in - charge. a) Nominal concrete 1:4:8 or leaner mix (i/c equivalent design mix)

Earth work excavation by mechanical means (Hydraulic Excavator) / manual means over areas (exceeding 30 cm in depth 1.5 m in width as well as 10 sqm on plan) with all lift including taking away excavator soil within Airport Premises. Transportation of earth will be paid separately in item no. 4 a) All kinds of soil.

Carriage of Materials By Mechanical Transport including loading , unloading and stacking Earth (Lead considered 6 K.M)

Consolidation of sub grade with power road roller of 8 to 12 tonne capacity i/c making good undulations etc . With earth or quarry spoils etc. and rerolling the sub grade.

Supplying and filling with river sand (Find sand of Zone IV from mainland) under floors/pavement including, watering, ramming consolidating and dressing complete in layers not exceeding 20cm (compacted) in thickness. Note : Sand from Mainland (India) to be used for this item.

Preparation of granular sub-base by providing close graded material, conforming to specifications mixing in a mechanical mix plant at OMC, carriage of mixed material by mechanical transport to work site, for all leads and lifts, spreading in uniform layers of specified thickness with mechanical means including neatly leveling & dressing on prepared surface and compacting with vibratory power roller to achieve the desired density, complete and as per direction of Engineer-in-charge. Note : GSBC Material from Mainland (India) to be used for this item.

Providing and laying dry lean cement concrete with coarse and fine aggregate conforming to IS:383, the size of coarse aggregate not exceeding 26.5 mm, aggregate cement ratio not to exceed 15:1, aggregate gradation after blending to be as per specifications, cement content not to be less than 150 Kg/cum, optimum moisture content to be determined during trial length construction, concrete strength not to be less than 10 Mpa at 7 days, mixed in a batching plant, transported to site, laid with a paver with electronic sensor, compacting with 8-10 tonne vibratory roller, finishing and curing etc. complete as per specification and direction of Engineer-in-Charge. Note : Sand from Mainland (India) & Stone aggregate from Mainland (India) to be used for this item.

Providing and laying Pavement Quality Concrete (PQC) produced in a batching and mixing plant having a Characteristic flexural strength i.e. flexural strength of 4.1 MPa at 28 days using Ordinary Portland cement of 43/53 grade or Portland Pozzolana Cement or Portland Slag cement conforming as per relevant IS codes, to be mixed at site, with 0.5% Super plasticizer by mass of cementitious material, fine aggregate, graded stone aggregates of 40 mm nominal size in appropriate proportion as per specification and job mix formula, laid in panels as per drawings/design as approved by the Engineer-In-Charge using Slip Form Paver or Fixed form paver including anti friction layer, joint filler board, making necessary provision for expansion, dummy and construction joint including filling with Polysulphide sealant of approved make, curing and making profile, complete as per direction of Engineer-in-Charge and specifications. The item for execution shall include all operations making pavement for intended use but not limited to following: (i) Polyethylene sheet (White in color) of thickness 400 micron conforming to IS: 2508 with 6mm thick fine sand layer. (ii) Providing and laying in position for expansion joint, 25mm thick pre-cut Synthetic joint filler board of approved make conforming to IS:1838(part 3)-2011, 45 mm from top (to be removed at the time of filling of Polysulphide sealant). (iii) Mechanically cutting dummy joints 3mm wide x 1/3rd thickness of slab which is subsequently widened to 10mm for the top 25mm depth and construction joints 10mm wide x 25mm deep as per specification. (iv) Providing and laying in position Polysulphide sealant of approved make conforming to BS-5212-1990 or IS: 11433-1995 in expansion/ construction / dummy joints including rounding off edges, applying 2 coats of approved primer compatible with the brand of Polysulphide and preparing the surface and applying masking tape along the edge of joint to prevent accidental spillage of sealant on top surface and to give neat finish to the sealant and removing the masking tape after application of sealant etc. as per the details below: (a) Expansion Joints of size 25 mm wide and 10 mm deep over 30mm dia expanded closed-cell Polyethylene foam back-up/backer rod of minimum density 22 Kg/Cum, as per manufacturer’s specifications and sketch at Appendix-‘A’. (b) Construction Joints of size 10 mm wide and 10 mm deep over 12mm dia expanded closed-cell Polyethylene foam back-up/backer rod of minimum density 22 Kg/Cum, as per manufacturer’s specifications and sketch at Appendix-‘A’. (c) Dummy Joints of size 10 mm wide and 10 mm deep over 12 mm dia expanded closed-cell Polyethylene foam back-up/backer rod of minimum density 22 Kg/Cum, as per manufacturer’s specifications and sketch at Appendix-‘A’. (v) Making profile as per DGCA CAR, panel drawing showing dummy, construction, expansion joints location. Note: (i) Areas inaccessible to paving equipment shall be constructed by manual/hand guided method. Areas in which manual/hand guided methods of construction become indispensable shall be got approved by the Engineer-in-Charge in writing in advance. (ii) The quantity of cement, type of cement and super plasticizer for one Cum. of finished concrete specified are for tendering purpose only. The contractor shall quote his rates assuming quantity of OPC cement as 360 Kg/Cum or 400 Kg of Portland Pozzolana Cement/ Portland Slag cement. In addition, if the actual quantity of cement & super plasticizer required as per laboratory mix design varies from the quantity assumed above, necessary cost adjustment for deviation in the quantity of cement and super plasticizer as per mix design, if any, shall be done as per the rate of cement and super plasticizer in actual supply voucher from manufacturer/authorized dealer at the time of execution. In the case of authorized distributor, the rate may be authenticated by the manufacturer. The rate of cement and super plasticizer exclusive of GST shall only be considered for payment. Note: Coarse sand & Stone aggregate from Mainland (India) to be used for this item.

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering. All work up to plinth level. a) 1:4:8 (1 cement : 4 coarse sand : 8 graded stone aggregate 40mm nominal size) Note : Sand from Mainland (India) & Stone aggregate from Mainland (India) to be used for this item.

Providing and laying in position machine batched and machine mixed and machine vibrated design mix M-25 grade cement concrete for reinforced cement concrete work, using cement content as per approved design mix, including pumping of concrete at site of laying but excluding the cost of centering, shuttering, finishing and reinforcement including Admixtures in recommended proportions as per IS: 9103 to accelerate, retard setting of concrete, improve workability without impairing strength and durability as per direction of Engineer-in-charge. “(Note :- Cement content considered in this item is @ 330 kg/cum.“Excess/ less cement used as per design mix is payable/recoverable as per the rate of cement in actual supply voucher from manufacturer / authorized dealer at the time of execution. In the case of authorized distributor the rate may be autheticated by the manufacturer separately). a) All work upto plinth level (M-25 grade reinforced cement concrete) Note : Sand from Mainland (India) & Stone aggregate from Mainland (India) to be used for this item.

Extra for providing richer mixes at all floor levels Note:- Excess/less cement over the specified cement content used is payable/ recoverable separately. Providing M-30 grade concrete instead of M-25 grade BMC/RMC (Note:- Cement content considered in M-30 is @340 kg/cum)

Centering and Shuttering including strutting, propping etc. and removal of form for : a) Foundations, footings, bases of columns etc. for mass concrete.

Centering and Shuttering including strutting, propping etc. and removal of form for all heights: a) Suspended floors, roofs, landings, balconies and access platform

Reinforcement for RCC work including straightening, cutting, bending, placing in position and binding all complete upto plinth level. a) High corrosive resistant/CRS Thermo-Mechanically Treated bars of grade Fe-500D or more.

Steel work welded in built up sections/framed work including cutting, hoisting fixing in position and applying a priming coat of approved steel primer using structural steel etc. as required. a) In gratings, frames, guard bar, ladder, railings, brackets, gates and similar works.

Conducting necessary test to determine K-value (modulus of subgrade reaction and determination of field density and moisture content and assessing the K-value after meeting necessary correction for load-deflection curbs, correction of bening of plates and correction of saturation of soils in field as per IS 9214-1976 (reframed 1987) with 75cm dia circular plate) i/c of submission of soild report of each assignment as directed by Engineer-in-Charge.

Painting runway / Taxi Track / apron marking with adequate nos of coats to give uniform finish with road marking paint of superior make as approved by the Engineer-in-Charge, i/c cleaning the surface of all dirt, scales, oil, grease and other foreign material etc. and lining out complete. a) New work (Two more coats)

Filling available excavated earth (excluding rock) in trenches, plinth, sides of foundations etc. in layers not exceeding 20cm in depth, consolidating each deposited layer by ramming and watering, lead upto 50 m and lift upto 1.5 m.

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level 1:2:4 (1 cement: 2 coarse sand (zone-III): 4 graded stone aggregate 20mm nominal size) Note : Sand from Mainland (India) & Stone aggregate from Mainland to be used (India) for this item.

Structural Design of Proposed Drain Section by engaging Consultant and Vetting of the same from IIT/NIT.

Supply of C. I. isolating transformer housing box, water tight round type, metal container of outside diameter 330mm, height 450mm made of 10mm thick cast iron moulding all round, expect top surface, which is 15mm thick, cast iron moulding suitable to receive light fitting base plate/ cover plate on the top & underground for housing transformer, power cable & having One / two no's holes opposite as per site requirement on the periphery centre, 75 mm above bottom surface suitable to receive one no. of 50 mm dia "B" class GI pipe/DWC/HDPE pipe and having a clear hole at other side surface centre, 300 mm above bottom surface suitable to receive one no. of 20 mm dia B class GI pipe with suitable size check nuts as required. The box should have two SS earth bolts of M10 x 40mm tapped inside near the hole (4" away from the hole centre) and having a drain hole at the bottom suitably tapped to receive 15mm dia, 'B' class GI pipe and having clear opening of 220mm at the top surface and 6 nos. M10 tapped hole having centre to centre distance of 260mm to receive fitting/ base plate and bolts as required as per the drawings.

Supply of 50 mm Dia (OD), 38 mm dia (ID), N-450 type Double Wall Corrugated high density polyethylene pipe having corrugation on the outer wall conforming to IS 14930 & IS 16205 Part 24 and ISI marked complete with necessary fittings such as couplers, bends and end caps etc., for protection of 5 KV grade underground cable directly in ground complete etc. as required.

Supply of 160 mm dia (OD), 145 mm dia (ID), N-450 type double wall corrugated high density polyethylene pipe having corrugation on the outer wall conforming to IS 14930 & IS 16205 Part 24 and ISI marked complete with necessary fittings such as couplers, bends and end caps etc., for protection of 5 KV grade underground cable directly in ground complete etc. as required.

Installation of Transformer housing box having double entry with a base concrete of 1:3:6 ( 1 cement: 3 coarse sand 6 concrete of 20 mm nominal size ) of size 630X630X100 mm thick and all around concrete of 1:2:4 ( 1 cement: 2 coarse sand 4 concrete of 20 mm nominal size) 150 mm thick and top slope as specified including providing & fixing 250 mm long 15 mm dia B class G.I. pipe with check nuts for drainage of water at the bottom. Fixing of 50 mm dia GI /HDPE/DWC pipe to the housing box by providing double check nut as applicable and similarly fixing of 20 mm dia GI pipe to the housing box on other side by providing double check nut for 20 mm dia GI pipe if applicable, alignment of housing box, top sloping with concrete etc. complete as required.

Laying of following dia Double Walled Corrugated high density polyethylene pipe of following size in ground complete with necessary fittings such as couplers, bends and end caps excluding excavation, sand cushioning and protective covering. 50 mm Dia (outer size)

Laying of following dia Double Walled Corrugated high density polyethylene pipe of following size in ground complete with necessary fittings such as couplers, bends and end caps excluding excavation, sand cushioning and protective covering. 160 mm Dia (outer size)

Constructing masonry Chamber 1mx1mx1m inside, in precast cement concrete solid block made from 1:1½:3 (1 Cement: 1½ coarse sand(zone-III) : 3 graded stone aggregate 20 mm nominal size) in cement mortar 1:4 (1 cement : 4 coarse sand) including necessary excavation, foundation concrete 1:5:10 (1 cement : 5 fine sand : 10 graded stone aggregate 40 mm nominal size) of thickness 100 mm, and inside plastering with cement mortar 1:3 (1 cement : 3 coarse sand) 12 mm thick, finished with a floating coat of neat cement including providing 75 mmt thick concrete slab for covering trench complete as per standard design.

AFL TOWER WORKS: Excavation of trenches by mechanical means in all kinds of soil for cables/ pipes, width not exceeding 300 mm upto a depth of 0.8m including refilling the trench and disposal of surplus soil etc as required.

JKG INFRATECH PRIVATE LIMITED

NSC Projects Pvt. Ltd.

Dineshchandra R Agrawal Infracon Pvt. Ltd.