REPAIR TO RUNWAY SURFACE USING PME AND RUBBER AND MOSS REMOVAL AT INS HANSA UNDER GE (NW) VASCO

Removal of Rubber deposits on Runway surface using water blasting cum vacuuming system with suitable operating pressure so that the total rubber deposits/ materials are removed from runway both rigid and flexible surface by the method of water blasting cum vacuuming system with suitable water pressure water blasting technology without damaging to the existing surface.Total rubber deposits should be removed and the debris/ water to be vacuumed simultaneously leaving no FOD so that the runway is available for operation immediately. Friction test should be carried out before rubber removal and after rubber removel with application of emulsion of approved make all as specified and directed by Engineer in Charge.

(k) Observed productivity of high pressure water blasting during normal working condition indicates the rate of 278 sqm per hour per unit per cleaning, therefore one touch down zone would require appx 100 hrs per unit. (l) Pressure of Oscillating high pressure water machine is between 350-700 kg/sqcm (m) The (µ) value for TDZ of both runways seperately along with overall runways, each shall be above 0.55 individually

Material and Labour for cleaning the surface with wire brush , making the surface free from dust and apply of cold polymeric bitumen emulsion (PME), mopping of total cold liquid PME min 1.0 lit per sqm (undiluted) for two coats (intervel between two coats shall be 4 to 5 hrs), after diluting with 50 % water, each coat diluted in the ratio 1:1 (PME: WATER) and ensure uniform finish of runway complete all as per manufacurers instructions complete all as specified and directed by Engr-in-Charge

M&L for preparation of old black top surface by brushing with wire brushes for removing caked mud etc sweeping with brooms and finally fanning the cleaned surface with air blower to remove loose dirt etc. complete and apply cold polymer modified emulsion (PME) by using mechanical spraying of total cold liquid PME 1 ltr per sqm (undiluted) for two coats with mineral filler as recommended by manufacturer of PME (after diluting with water), each coat diluted in the ratio 1:1 (PME: WATER) and ensure uniform finish of applied flight strips complete all as per manufactcurer instructions all as specified and directed by Engr-in-Charge

Removel of conflict paint , markings on Apron & runway surface using water blasting cum vacuuming system with suitable operating pressure so that total paint removed from runway both (rigid & flexible) surfaces by the method of water blasting cum vacuuming system with suitable water pressure water blasting technology without damaging the existing surface using SH 5000 StripeHog machine or equivalent machine all as specified and as directed by Engr-in-Charge.

Ruway friction coefficient measurement with car integrated friction testing machine like GFTE/ SARSYS @ 3 mter one run and 6 mtrs bothy (flexible and rigid) side of the entire runway centre line the other run. Friction testing should be done before rubber removal and after rubber removal as recommended by ICAO Airport service manual Doc 9137 part 2 Fourth edition 2002, Chapter 5 complete all specified and directed by Engr-in-Charge.

Removal of Moss/Algae deposits on Apron and Runway surface using water blasting cum vacuuming system with suitable operating pressure using SH-5000 stripeHog machine or equivalent machine complete all as specified and directed by Engineer in Charge.