Re-construction of Runway from Chainage 50 m to 350 m with Rigid pavement and associated works at Dimapur Airport. Sub Head Strengthening of affected area of Runway 30/12 and allied works.

Cutting the existing bituminous pavement concrete of runway/ taxiway upto required depth by milling machine and loading in tippers with conveyor belt attachment including stacking of materials (mechanically) upto a lead of 2 ( two ) km in AAI premises including cleaning and dressing of surface etc as directed by the engineer-in-charge.

Kerf cutting with machine in taxiway/runway/apron of PQC/bituminius surface of suitable depth and width for making smooth cut line to protecting the surrounding of bitminous layer during dismentling etc complete as required and as per direction of the engineer-in-charge.

Providing and applying tack coat (*using bitumen emulsion (Rapid setting) complying with IS:8887 or suitable low viscosity paving bitumen of VG 10 grade conforming to IS:73), spraying the bitumen with mechanically operated spray unit at the rate specified below, cleaning and preparing the existing pavement surface with mechanical broom & air compressor as per specifications complete in all respects as per direction of Engineer-In-Charge. (a) 0.35Kg/Sqm on existing bituminous surface.

Providing and laying of Hot Mix Dense Asphaltic Concrete(DAC) using crushed stone aggregate of quality, size and grading as specified and 2% cement by weight of aggregates as filler of quality as specified and Viscosity Grade VG-30 Bitumen (supplied in bulk) in proportions as per job mix formula and laid to specified levels, grade and camber as per specification, drawings and as directed by the Engineer-in-Charge including compacting with 8-10 tonne, preferably vibratory road roller of adequate capacity to achieve the specified values of compaction, strength, surface accuracy complete [for tendering purpose VG bitumen of grade (VG-30) content shall be taken as 135 kg/m3 of mix supplied in bulk produced by Govt. Refineries and 2% cement by weight of aggregates as filler material]. Note :- Prior to start of work the job mix for Dense Asphaltic Concrete shall be got designed by the agency from the laboratory approved by AAI and the cost of mix design shall be borne by the agency and nothing extra is payable on this account.

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, including cleaning the surface of ail dirt, scales, oil, grease and other foreign material etc. and lining out complete. a) New work (Two or more coats)

Excavation in soil with hydraulic excavator including cutting and loading in tippers, trimming bottom and side slopes, in accordance with requirements of lines, grades and cross section and transporting and unloading the surplus soil within all lifts and lead upto 1 km.

Preparation and consolidation of sub grade with power road roller of 8 to 12 tonne capacity after excavating earth to , dressing to camber and consolidating with road roller including making good the undulations etc. (Excavation of earth shall be paid in respective item)

Construction 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 tippers to work site, for all leads & lifts, spreading in uniform layers of specified thickness with motor grader on prepared surface and compacting with vibratory power roller to achieve the desired density, complete as per specifications and directions of Engineer-in-Charge. (A) With material conforming to Grade-III (size range 26.5 mm to 0.075 mm) having CBR Value-20

Supplying and spreading of good earth at site including roylty and carraige up to 20KM lead complete as per direction of EIC. (earth measured in stack will be reduce by 20% for payment)

Please Enable Macros to View BoQ information