Strengthening of Taxiway N2 and Resurfacing of worn out concrete surface at Apron Bay No. 8 at Goa Airport.

Amount

Providing and applying tack coat using hot straight run bitumen of viscosity grade vG-30(60/70) including heatlng the bitumen, spraying the bitumen with mechanically operated spray unit fitted on bitumen boiler, cleaning and preparing the existing road surface as per specifications. For tendering purpose Viscosity grade bitumen content shall be taken as 0.50 Kg/sqm. a) 0.50 Kg/Sqm on existing bitumen 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 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].

Providing and laying of Hot Mix Semi Dense Asphaltic Concrete(SDAC) 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 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 compaction, strength, surface accuracy complete [for tendering purpose VG bitumen of grade VG30 content shall be taken as 120 kg/m3 of mix supplied in bulk produced by Govt. Refineries and 2% cement by weight of aggregates as filler material](Based on AAI Flexible Airfield Pavements).

Repairing of Pot Holes, Edges & Deep Patches of Apron: Repairing of Pot Holes, Edges & Deep Patches by chipping out deteriorated concrete surface, cutting it in square shaped groove & repairing with filling Xypex Megamix II & Xypex Xycrylic admixture or Vendex mortar & vendex chemelast liquid or equivalent material by mixing in proper ratio as reccomended & specified by the manufacturer, coating of a primer/bonding coat by the same manufacturer and repairing the surface complete. The item include cost of all material, labour and T&P, all taxes etc complete in all respect as per satisfaction and direction of Engineer- in - charge.The vital values/ parameters of the material shall be as under: a) Direct Tensile Bond Strength (2.3 Mpa- ACI 503R) b) Low shrinkage fiber reinforced c) Chemical durability (mass loss negligible i.e. 0.22% in 84 days - ASTM C 267) d) Compressive strength (59.3 Mpa@ 28 days - ASTM C 109) e) Rapid chloride permeability (420 coulombs @ 90 days - ASTM C1202 f) Flexural Strength (8.2 Mpa- ASTM C 78 @ 28 days) g) Splitting Tensile Strength (4.2 Mpa - ASTM C 496) h) Scaling Resistance (no scaling in 50 cycles - ASTM C 672 Including cost of all material, labour and T&P, complete in all respect as per satisfaction and direction of Engineer- in - charge. i) Setting Time as per ASTM C 266 : initial : 4.10 hrs:min & final : 7:10 hrs:min. The repair & filling shall be got done through the authorised applicator of the manufacturer after approval of Engineer-in-charge.

Resurfacing of Worn out Concrete surface at Apron Area: Cleaning the wear out and deteriorated concrete surface/damaged concrete surface with wire brush & washing with water. After neatly cleaning the surface area, repairing the surface by applying bond coat of XYPEX Megamix-I mixed with XYPEX XYCRYLIC ADMIX & filling it with XYPEX Megamix-I mixed with XYCRYLIC ADMIX or Vandex Uni-mortar-I & Vandex chemelast liquid or equivalent material by mixing in proper ratio as recommended & specified by the manufacturer, coating of a primer/bonding coat by the same manufacturer and repairing the surface complete. The product should have following minimum property: a) Direct Tensile bond strength to concrete (1.24 Mpa- ACI 503R), b) Low shrinkage fiber reinforced, c) Compressive strength (24.9 Mpa @ 28 days - ASTM C 109) Item includes cost of all material, labour, T&P & all taxes complete in all respect as per satisfaction and direction of Engineer- in - charge. The repair & filling shall be got done through the authorised applicator of the manufacturer after approval of Engineer-in-charge.

1 Repair of Cracks in Apron Area :Cutting & Cleaning Cracks : Cutting of "U" shaped groove of approx. 40 mm (W) X 30 mm (D) along the cracks in apron with a chipping machine & cleaning with wire brush, air blower & water by using all safety equipments. Including cost of all material, labour and T&P.Cracks Repair : Repair of cracks by applying bond coat of XYPEX Megamix-II mixed with XYPEX ACRYLIC ADMIX & filling it with XYPEX Megamix II mixed with ACRYLIC ADMIX. The product should have following minimum property including all material and T&P : a) Low shrinkage, thixotropic, fiber reinforced b) Compressive strength (59.3 Mpa@ 28 days - ASTM C 109) c) Flexural Strength (8.2 Mpa- ASTM C 78 @ 28 days) d) Tensile Strength (>4 Mpa - ASTM C 496) e) Setting Time: Initial: 4.10 (hrs), Final: 7.10 (hrs)

Painting runway / taxi track / apron marking with adequate no. 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. New work (Two or more coats)