SPECIAL REPAIRS TO CONCRETE TARMAC AT DESK-1 DISPERSAL AT AF STATION BIDAR

Amount

Preparation of cracked top surface of concrete slab on runway with wire brushes and manually if required using diamond but blade mechanicaly driven and cleaning with air compressor to remove all loose dirt, dust, scalling, grease etc complete all as specified and as directed.

Applying primer NG CHEM 121 for the cleaned existig surfaces complete all as specified and as directed.

Applying Den mort / NG MORT trowelling compound on primed surfaces with thickness form 2mm to 5mm including filling of small holes up to 10 mm depth and levelling the surfaces to match the existing surfaces level of runway / taxi track etc complete all as specified and as directed. Note :- After completion of Job entire site shall be made free from FOD at the same time on daily basis by the contractor

M&L for cutting, racking out existing sealing compound from joints of rigid pavements including raking spilled out sealing compound from the edges of existing joints and removing the raked out sealing compoound and forming joints 15 mm avrage width and 20 mm average depth by diamond cutter and removing the debris and other foreign materials to a distance exceeding 50 mtr but not exceeding 150 mtr and depositing where directed by Engineer-in-Charge including cleaning the side and bottom of joints by compressor air (Diesel driven compressor of suitable capacity), preparing joints to receive polyurethane joint filling and primed with primer of approved make , sealed with polyurethane sealant of approved Make and minimum depth of sealent above backup rod shall be 10 mm with back up rod of suitable size complete all as per manufacturer instructions and all as specified and as directed.

All as per Ser Item No 4 above but forming of joints 25 mm average width and 30 mm average depth with suitable size of backup rod complete all as specified and as directed.

M&L for 12 mm thick pre-formed synthetic filler board in rigid pavements after taking down the existing old / out lived filler board and claning the side and bottom of joints by compressor air (Diesel driven compressor of suitable capacity) complete all as specified and as directed.

M&L for 20 mm to 25 mm thick pre-formed synthetic fillerboard in rigid pavements after taking down the existing old / out lived filler board and claning the side and bottom of joints by compressor air (Diesel driven compressor of suitable capacity) complete all as specified and as directed.

Preparation of old painted surfaces of roads, bituminious pavements, flexible pavings,aprons and the like and painting lines,dashes,arows ,letters etc. exceeding 10 cm width with one coat of aqua based road marking paint of tint white or golden yellow or orange or as required at site complete all as specified and as directed .

Mr Madhusudhan Kotarki

DWARKA PERSHAD RADHEY RAMANLAL