REPAIR TO NLB, EDGES, POT HOLES, CRACKS, SURFACE TOPPING JOINTS PAINTING AND OTHER CONNECTED WORKS ON PTT AT AF STN NAL

Repairs to concrete pavements by cutting the damaged, spoiled edges in concrete pavements slabs to vertical rectangular cross section with power driven concrete cutters, removing all loose and foreign materials to outside of contonment area , cleaning surface thoroughly with wire/coir brushes and then cleaned the surfaces with compressed air by air blower compressors ,including priming the surface with suitable primer and filling with epoxy mortar @ 2 Kg per 1000 Cu.cm after and including form work wherever required all as specified and as directed.

M&L complete removal of deteriorated /eroded top surfaces ( epoxy or concrete surface ) with wire / coir brushes and with suitable power driven concrete cutters up to thickness 03 to 04 mm and then cleaned the surfaces with compressed air by using air blower compressors to remove all loose dirt, dust, scaling, grease, spots etc, priming the surfaces with epoxy based primer etc (with suitable brushes ) complete all as specified and directed.

Applying Epoxy repair mortar on primed surfaces with thickness varrying from 03 to 04 mm including filling of small holes up to 10 mm depth @ 8.00 kg per sqm and levelling the surfaces to match the existing level with existing surfaces of the runway / Taxi track complete all as specified and directed.

M&L for making good the cracks and repairing disintegrated / spoiled concrete slabs to vertical rectangular cross section with power driven concrete cutters, removing all loose and foreign materials to outside of contonment area , cleaning surface thoroughly with wire/coir brushes and then cleaned the surfaces with compressed air by air blower compressors and filling with Elastomeric concrete after application of specified primer and removal of rubbish to a distance exc 250m and not exc 500m and depositing , complete all as specified and as directed. Note: i) All necessary formwork, sides etc shall be included in the quoted rates. ii) Primer used shall be of the same make as of elastomeric concrete.

Raking out existing Sealing compound from expansion Joints of size 20 mm to 25mm wide and up to a depth of 30 mm from existing Flexible/concrete pavements and spilled sealing compound from the edge of expansion joint removing the old sealing compound and all foreign material to a distance of 100 mtr and depositing as directed by Engr-in-Charge, cleaning and preparation of existing expansion joint , priming the sides and bottom of expansion joints with primer for Grade B sealing Compound and Sealing the expansion joint 20mm to 25mm wide and 25 mm deep (leaving a clear space of 5mm at top in winter and 3 mm top in summer with sealing compound Grade B heat resistance complete all as specified.

All as per item no 05 above but for construction joints of size 10 to 14 mm wide and thickness upto 30 mm deep.

All as per item no 05 above but for contraction joints ( dummy) of size 08 to 10 mm and thickness upto 65 mm deep.

Raking out existing filling in expansion Joints of width exceeding 20mm but n exc 25mm and required depth as specified by special tool like concrete cutter , wire/coir brushes / machines and joints cleaned throughly with application of compressed air , making free from all the loose material ie dirt , dust, grease , existing sealing compound ,filler board including sticked material of existing compound racked up to full depth ( up to 45 mm ) of Joints etc to entire satisfaction of Engr-in-Charge and filling the joint with the polyurathene joint sealant single compound component using mechanical means to a depth exceeding 08 mm but n exc 12 mm ( depth above the backup Rod ) with minimum performance guarantee of 10 years and minimum movement accommodation factor ( MAF) +/- 30 % confirming to the requirement of BS-5212 and EN-141575-2003 for hydrolysis /water resistance test including two coats of primer and filling the balanced racked depth of the joint with backup material ie; closed cell polyethelene to ensure tight packing so that no gaps or void exist at the top of backup material separated by bond breaker of suitable size HD 10 filler board in position where required and applying masking tape on edge of joint to prevent accidental slippage of sealant on top surface to give a neat finish to the sealant and remove the masking tape after sealant is applied as required complete as per manufacturer's instructions and complete all as specified and directed by Engineer In Charge.

All as per serial item No 8 above here in before but construction joints of size 12 to 14 mm wide and 25 mm depth .

All as per serial item No 8 above here in before but contraction (dummy) joints of size 8 to 10 mm wide and 25 mm depth .