REPAIR TO CERTAIN RUNWAY SLABS AND REPAIR TO RUNWAY JOINTS WITH SEALING COMPOUND OF AIRFIELD AT AF STATION CARNICOBAR

Amount

M&L for racking out old dummy joints 10 to 12 x30 mm deep of existing sealing compound in single detached joints without disturbing the concrete surface under neath dusting and cleaning the surface with stiff brushes etc. and racking out all old compound and dust with compressed air and removing all old materials away from the runway area exccedding 500 mtr to premices as directed by Engineer in Charge and priming the cleaned joints with bitumenious primer suitable for grade B sealing compound and filling the joints with sealing compound grade B including scrapping excess materials from top surface complete all as directed by Engineer in Charge.

Note:- The contractor shall provide all the safety life jacket for all concerned workers/superwiser and self and also provide work in progress board/ pillar for working area and follow ass the instruction /rules of Airfield.

All as per item no.1 here in before but for Expansion joint of size 25x30mm without disturbing the jiint filler materials underneath complete all as directed by Engineer in Charge.

M&L for repair to broken edges , deep cuts, spoiled joints, pop out broken corners, pot hols and developed cracks as per site requrement by cutting out concrete with concrete cutting machine, cheselling of concrete as to required shape as directed by Engineer in Charge to a depth of 50mm to 100mm, removing all loose/scrapped materials to a distance 100 mtr away from runway edge, cleaning the surface including drying surface by using blow lamp if the surface is wet,removing dust/dirt with compressed air pressure including taking out existing sealing compound grade B in affected area and priming the surface with epoxy resin based primer for concrete surface with Nitroprime-25 Primer (FOSROC) of surface area after cutting all as per manufecturers instructions complete all as specified and directed by Engineer in Charge

M&L for high strength epoxy concrete FOSROC(Expocrete EC) filling for area prepared under item No.3 here in before, concrete prepared by mixing 27.5 Kg Eporete EC with 30 Kg of stone aggregate of grade not exceeding 10mm as per mixing ratio of Epoxy Concrete by weight in Kg Base(B) Hardener (H): Fine filler (FF):Course aggregate (CA) are (4.537:2.145:20.818:30) and the materials shall be weighted accurately in the specified proportion. The epoxy concrete shall be applied in the prepared groove within 45 Minutes of application of epoxy resi primer or as approved by Engineer in Charge and as per per manufectures instructions complete all specified. Note: The Contractor shall provide the safety life jacket for all concerned labour/supervisor and also provide work in progress board /pillar area and fallow the rules of airfield.

Note:- (i) Stone aggregate required to be used for epoxy concrete shall be procured from Mainland only. (ii) This epoxy concrete work shall be carried out under close supervision of rep of manufecturer's of epoxy materials. (iii) The contractor shall provide all safety precautions to all their workers and also necessary indation board such as work in progress etc. also be provided during working.

M/S G S GREWAL

MD FOYZAL HOQUE