Maintenance of Joints, painting and other connected works related to rigid portion of Runway/PTT/Dispersal at AF Stn Tezpur

Material and labour for repair to cracks (1mm-3mm wide) in existing rigid/ flexible pavement of dispersal/ runway/ PTT by cleaning the cracks with hand brushes or water under pressure and drying with compressed air etc. filling in the cracks with epoxy mixture of araldite and hardener, araldite 02 (Two) parts and hardener 01 (One) part, complete all as specified and directed. Note: Running length will be used for measurement.

Material and labour for raking out existing sealing compound from joints with using appropriate tools and mechanical means for joints of size 10-20mm wide and 30mm deep, cleaning the joints from sides, bottom and removing the loose particle of sealant dust, foreign matters etc. with suitable tools and mechanical driven machine, drying the joints surface of moisture completely by means of mechanical driven air blower, including putting in sealing compound Grade 'B' of approved make in joints as per manufacturer's instruction and cleaning the surface, complete all as specified and directed. Note: In case of additional depth beyond 30mm, the same shall be filled with dry sand before joint filling.

Materials and Labour for raking out existing old sealing compound Grade ‘B' with using appropriate tools and mechanical means for joints of size 20-35 mm wide and 45-50 mm deep, cleaning the joints of sides and bottom by diesel operated mechanical air blower incl. removing the loose particles of sealant, dust outside runway,dispersal, PTT etc drying the joints surface of moisture completely by means of mechanical driven air blower, applying one coat of primer and insert compressible cross linked polyurethane form backer rod of dia 25-40 mm, closed cell, medium density of appropriate dia as per site condition, putting in polyurethane joint sealant of approved make in joints as per manufacturer's instruction, and cleaning the surface, complete all as specified and as directed.

Material and labour for racking out existing joint sealant from expansion joints with using appropriate tools and mechanical means for joints of size 20-25mm wide and 20mm deep of sealant, including taking out compressible backer rod of dia 25-30mm (Total depth 45-50mm) from joints, cleaning the joints of side, bottom and removing the loose particle of sealant dust etc, with suitable tools and mechanical driven machine, drying the joints surface of moisture completely by means of mechanical driven air blower, applying one coat of primer and insert compressible cross linked polyurethane form back up rod, closed cell, medium density of appropriate dia as per site condition, putting in polyurethane joints sealant of approved make in joints as per manufacturer's instructions and cleaning the surface, complete all as specified and directed.

Material and labour for racking out existing joint sealant from Construction/Dummy joints with using appropriate tools and mechanical means for joints of size 10-12mm wide and 10mm deep of sealant, including taking out compressible backer rod of dia 12-15mm (Total depth 22-25mm) from joints, cleaning the joints of side, bottom and removing the loose particle of sealant dust etc, with suitable tools and mechanical driven machine, drying the joints surface of moisture completely by means of mechanical driven air blower, applying one coat of primer and insert compressible cross linked polyurethane form back up rod, closed cell, medium density of appropriate dia as per site condition, putting in polyurethane joints sealant of approved make in joints as per manufacturer's instructions ans cleaning the surface, complete all as specified and directed.

Material and labour for cutting out defective portion of existing rigid pavement for depth 25mm to 50mm from top surface of slab by mechanical means / manually by chiseling, make regular shape and size, removing all debris to a distance exceeding 100 metres but not exceeding 200 metres from starting point, cleaning loose particle thoroughly with mechanical air blower, applying a coat primer uniformly on the horizontal and vertical faces with bristle brush, filling with epoxy resin mortar (1:5), one part of epoxy resin and five parts of Quartz sand as per manufacturer's instructions, on primed surface and finished by means of trowels and flats, finished true levelled with existing adjoining rigid pavement, complete all as specified and directed.

Material and labour for racking/cutting out defective portion of existing rigid pavement for depth 25mm from top surface of slab by mechanical means / manually by chiseling, make regular shape and size, removing all debris to a distance exceeding 100 metres but not exceeding 200 metres from starting point, cleaning loose particle thoroughly with mechanical air blower, applying a coat primer uniformly on the horizontal and vertical faces with bristle brush as per manufacturer's instructions, pouring in pre-mixed elastomeric concrete (self levelling) on primed surface and finished by means of trowels and flats, complete all as specified and directed.

Material and labour for preparation of old painted surfaces of rigid/ flexible pavement (concrete or asphaltic) of runway, taxi track, links etc., painting lines, dashes, arrows, figures, letters etc. on roads, pavements and the like exceeding 10cm wide with one coat of water based acrylic paint (white/ yellow/ orange/ black) as per manufacturer's instructions, complete all as specified and directed.

Materials and Labour for preparation of old painted surfaces of rigid pavement (concrete or asphaltic) of runway,taxi track,links etc., painting lines, centre line,dashes, arrows,figures, letters,etc. on roads pavements and the like not exceeding 10cm wide with one coat of water based acrylic paint (Yellow / black colour) as per manufacturer's instructions, complete all as specified and directed.

Materials and Labour for preparation of surfaces of rigid/flexible pavement (concrete or asphaltic) of runway,taxi track,links etc., painting lines, dashes, arrows, figures, letters, etc. on roads, pavements and the like exceeding 10cm wide with two coats of water based acrylic road marking paint (white/yellow/orange/gre) as per manufacturer's instructions,complete all as specified and directed.