REPAIRS TO JOINT FILLING AND CRACKS OF RUNWAY, DISPERSAL AND ALLIED AREAS

Amount

Racking out existing filling in expansion joints, construction joints, dummy joints upto 25mm depth including scrubbing of joints with diamond cutter machine (Heavy duty) or gas flame torch with heat application to remove bitumen Grade 'B' and to remove sticking sealing compound from the sides and top of joints and totally cleaning the top surface of joints with brush and finally fanning with compressed air to make the joints free from all loose materials i.e. dirt/dust etc to entire satisfaction of Engr-in-Charge, applying with provision of bond breaker tape on bottom of joint and filling depth of joint with provision of polyurethene back up rod of suitable dia to ensure tight packing so that no gap or voids exist at the top of backer rod. The deteriorated edges of concrete joints (included upto 50mm either sides of the joints) shall be made good to true line with provision of polymer concrete. Joints (10mm to 15mm wide) shall be sealed with provision of polysulphide joint sealant using Techseal-RDL 941EH or Techseal PU-2 of M/s Choksey Chemicals Pvt limited/Rallithane or Colpor-200 of M/s Fosroc chemical (India) Pvt Ltd./Seal N Flex FC or Seal N Flex 2K polyurethene joint sealant manufactured by BOSTIK INDIA PVT LTD and with primer N-49 and filling the joints with Polyurethane based sealing compound as laid down in manufacturer's instructions and as directed by Engr-in-Charge. Minimum clear depth of sealant above back up Rod shall be 10mm complete all as specified and as directed. NOTES:- (i) Size of joints shall be made by cutting in case not available at site. (ii) If width of joints by cutting exceeds as specified above, the same shall be filled by polyethylene based sealant and no extra payment shall be made. (iii) Remaining depth at bottom (after keeping provision for back up Rod & sealant) shall be filled with sand and cost of same shall be deemed to be included in the item rate quoted by tenderer. No extra payment for provisioning of sand (if any) shall be made. (iv) Masking tape shall be applied on edges of joints to prevent accidental slippage of sealant and shall be removed after filling with sealant. Cost of the same shall be deemed to be included in the item rate quoted by tenderer. Make of sealant shall be Techseal-RDL 941EH or Techseal PU-2 of M/s Choksey Chemicals Pvt limited/Rallithane or Colpor-200 of M/s Fosroc chemical (India) Pvt Ltd./Seal N Flex FC or Seal N Flex 2K polyurethene joint sealant manufactured by BOSTIK INDIA PVT LTD and with primer N-49 as laid down in manufacturer's instructions including marking tape 40mm wide on both edges joint before filling the joint and removing the tape immediately after applying sealant or equivalent as approved by Accepting Officer.

Description all as per srl item No 1.00 here-in-before but joints 16mm to 24mm wide and 10mm minimum clear depth of sealant above back up rod complete all as specified and as directed.

Description all as per srl item No 1.00 here-in-before but joints 25mm to 30mm wide and 12mm minimum clear depth of sealant above back up rod complete all as specified and as directed.

Description all as per srl item No 1.00 here-in-before but joints 31mm to 35mm wide and 15mm minimum clear depth of sealant above back up rod complete all as specified and as directed.

Repair to POP out stalled joints, corner spot hole in concrete slab by cutting, chiseling manually/mechanical cutter side perpendicular to a minimum of 3 cm and cleaning off all loose or broken materials to a distance exc 250 metre, cleaning and washing the surfaces with acid solution ( a mixture of hydrochloric acid and water in equal proportion @ 7 Litres per 10 Sqm) application of primer to dry surface of side and bottom and surface with Epoxy treatment resin mortar (mixture of Adralite GY-257 vantigo and adradur HY -840 vatigo with quarts sand) including form work where required complete, all as directed. Make :- Bostic/Pidilite/Fosroc chemicals/Sika India Pvt Ltd. or equivalent in other E-in-C approved make. Notes :- (a) Where the thickness/size is more than 5 cms, Epoxy resin mortar shall be applied in two layers. (b) Joints and broken corners shall be cut by cutter and POP out /POP hole shall be cut by cutter/chiesel.

Repair to broken surface of existing pavement/concrete slab by cutting chiseling manually/mechanical cutter side perpendicular to a minimum depth of 0 to 50mm and totally cleaning the surface with brush and finally fanning with compressed air to make the free from all loose materials i.e dirt/dust etc to entire satisfaction of Engr-in-Charge & all loose material trough a distance exc 250 mtr, cleaning and washing the surfaces & applying primer as per manufacture instruction & filling the surface in self levelling polymerized elastomeric concrete EC (three component cold applied) prepared by mixing of 3.6 Kg of component A and 0.9 kg of component B with 5.5 Kg part C (sand + fibre) and properly mixing in purpose made using drill and spiral mixing paddle machine to obtain a true surface and finally tooling the set surface with hand tools to obtain a grooved texture finish complete all as specified as per manufacturers instructions and as directed by Engr-in-Charge. MAKE of Polymerized elastomeric conrete:- Shali Patch EC by STP or equivalent in Pedilite/Fosroc chemicals/ Sika india Pvt Ltd or Equivalent in other E-in-C approved make. Note :- (a) Masking & foring material shall be applied on edges to prevent accidental slippage of material and shall be removed after filling with material and cost of the same shall be deemed to be included in item rate quoted by tenderer. (b) Work shall be carried out through authorized applicator only & cost of the same shall be deemed to be included in item rate quoted by tenderer and nothing extre shall be admissible on his account.

SHIVAE CONSTRUCTION

SHIV CHARAN GUPTA AND SONS