REPAIR/MAINTENANCE OF RUNWAY, LINKS/TAXI TRACKS, JOINT FILLING, COLD EMULSION, PATH AND DTGM REPAIR AT AF STN BAMRAULI

Amount

M&L for preparation of old painted bituminous/concrete surfaces of runway / road for painting lines, dashes, arrows, letters and the like exceeding 10cm width or girth and applying one coat of aqua based runway / road marking paint golden yellow, black or white to give uniform finish complete all as specified and directed.

M&L for preparation of old painted concrete surfaces of runway slab / taxi track / dispersal for painting lines, dashes arrows letters (FOD marking) and the like not exceeding 10cm wide and applying one coat of runway marking paint aqua based, golden yellow, black or white to give uniform finish complete all as specified and directed.

Demolition of cement concrete of any description and in any position not otherwise specifically provided for complete all as specified and directed.

M&L for 10mm thick sand cushion with clean river sand duly clear of residual, organic and deleterious materials spread evenly to uniform thickness laid over existing DLC layer complete all as specified and directed.

Supplying and laying 400 micron thick HDPE sheet (virgin quality) water proof, wrinkle free, without puncture having minium weight 390 gm/Sqm over sand cushion with minimum 300mm overlap between adjacent joint of sheet complete all as specified and directed.

M&L for Pavement quality concrete (PQC) of minimum 28 days field flexural strength of 45Kg / Sqcm or 4.5 Mpa, aggregate gradation as per Table 3 of IRC 15 2017, coarse aggregate of clean, hard strong, dense non-porous and durable pieces of crushed stone gravel, fine aggregates of clean natural sand or crushed stone sand or combination of both using minimum 360 kg/cum of cement with non-circular virgin synthetic fibre of 12-18 mm length, specific gravity 1.34 to 1.39, UV stable, alkali resistant, with equivalent dia 15-40 micron, minimum melting temperature as 240°C and minimum tensile strengthof 300 Mpa and at the rate as specified by the manufacturer, PQC laid, spread and compacted with fixed form paver of minimum 3.50 m width, including curing and tining mechanically complete all as specified and directed. Required surface texturing to be done as specified in Clause 10.1.14 and Table 9 of IRC 15-2017. Rates shall be inclussive of necessary formwork.

M&L for preparing of existing construction / contraction / dummy joints including removing filled material in joints of runway by removing the cracking out joints 10 to 12 mm wide and 27 mm deep including removing all loose material and cleaning the joints with brush and removing all loose fine particles with compressed air and providing a suitable dia polyurethane back up rod/debonding strip and top 13mm primed and sealed with using polyurethane based sealing compound with suitable primer as per manufacturers recommendation polyurethane sealent complying with BS-5212 & BS-4254 and EN 141875-2003 (for hydrolysis / water resistance test) priming the sides with minimum MAF± 30 % (with ten years performance guarantee) and applying masking tape on edges of joint to prevent accidental spillage of sealent and removing the masking tape after sealent is applied complete all as specified and directed. Note: - Material obtained from removing of existing filled up materials shall be removed from out side MOD land.

M&L for preparing of existing expansion joints including removing filled material in joints of runway by removing the cracking out joints 20 to 25 mm wide and 38 mm deep including removing all loose material and cleaning the joints with brush and removing all loose fine particles with compressed air and providing a suitable dia polyurethane back up rod/debonding strip and top 13mm primed and sealed with using polyurethane based sealing compound with suitable primer as per manufacturers recommendation polyurethane sealent complying with BS-5212 & BS-4254 and EN 141875-2003 (for hydrolysis / water resistance test) priming the sides with minimum MAF± 30 % (with ten years performance guarantee) and applying masking tape on edges of joint to prevent accidental spillage of sealent and removing the masking tape after sealent is applied complete all as specified and directed. Note:- Material obtained from removing of existing filled up materials shall be removed from out side MOD land.

M&L for cleaning of cracks of depth upto 30mm and width upto 20mm in bituminous surfaces with mechanical blower and applying bitumen based hardener primer and filling with bitumen crack filler of joint sealer bituminous grouting material complete all as specified and directed. Note: (i) Work shall be carried out by authorised applicator of firm. (ii) The warranty of materila shall be three years from the date of completion of work.

Material and Labour for repair to broken/damage portion of concrete slab or pavement by cutting damaged portion of slab/spoil edges to triangular / rectangular cross section with mechanical cutter and removing all loose and foreign materials and depositing the same to outside MOD land and cleaning the surface by compressed air to remove all dust dirt etc. and washing with hydrochloric acid and filling epoxy resin mortar after application of epoxy primer as per manufacture instructions with bull nosing the edges complete all as specified and directed. Note: (i) Working hours may be restricted due to flying operations. (ii) Unit quoted rate shall be deemed to include the cost of pwer supply required for curing of damaged portion of concrete slab of runway. (iii) Material obtained from damaged portion of concrete slab shall be removed to out side MoD land.

M&L for removal of rubber deposits from runway surface using water blasting cum vaccuming system with suitable operating presuure so the tocal rubber deposits are removed from runway both (rigid and flexible) surfaces without use of any chemical and no damage to the exisiting surface complete all as specified and directed. (i) The work shall be carried out through authorised and qualified applicator. (ii) Total rubber deposits should be removed and the debris / water to be vaccumed simultaneously leaving no FOD so that the runway is available for operation immediately. (iii) Make of machine to be deployed for runway rubber removal should have E-in-C's Branch approval such as SH8000, SH5000, SK3000. (iv) Rubber deposit debris should be in solid form when finally disposed. (v) In any emergency condition the machine should exit from the runway in less than 2 minutres without leaving FOD. (vi) Friction test should be carried out before & after rubber deposit removal operation. (viii) After carrying out rubber removal operation on the runway, the friction reading of the rubber removed segment should be minimum 0.55 μ.

Cutting of existing runway / taxi track cracks and spalled edges, 35 to 50 mm depth, by mechanical tools, making grooves at edges, cleaning through air blower / air blasting and applying prorietery primer on the cleaned surface to obtain and finally filling in Elastomeric Concrete (prepared by mixing Part A, Part B and adding fiber glass sand all as per manufacturer's instructions) to obtain a homogeneous mix and finally tooling the surface with hand tools to obtain a groovbed textured finish complete all as specified and directed.

M&L for retro-reflective sheet / tape for sign boards (800mm x800 mm) installed in airfield area consisting background with black reflective sheet and golden yellow colour alphabet letter (10 cm width and 300 mm height), 25mm thick border and one arrow (300mm long and 100mm wide) complete on both sides of boards complete all as specified and directed.

M&L for preparation of old black bituminous surfaces by fibre brush for removing all loose dust / dirt particles etc., sweeping the surface with brooms and finally the cleaned surface with gunny bags to remove all loose particle / dust etc. and applying evenly a coat of cold bituminous emulsion @ 5 Kg per 10 Sqm by brushing to an uniform and fully blinded surfaces complete all as specified and directed. Note: (i) Cold bituminous emulsion shall be slow setting emulsion (SS-1) as per IS:8887 and shall be procured directly from the manufacturer's only and brought at site in sealed drum/container.

R N KHARWAR & SONS (BID ID -3413242)

M/s greenstone construction (BID ID -3424671)