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Maintenance management of grooved runway pavement
Published in Maurizio Crispino, Pavement and Asset Management, 2019
C. Yeung, T.F. Fwa, C. Low, C.Y. Choong, C.O. How
Based on the above considerations, the additional groove-related condition survey procedures currently on trial at the Singapore Changi Airport include the following:Manual inspection to check for groove disintegration – To guard against foreign object damage to aircrafts by debris and loose fragments of pavement materials, visual inspection is included in the daily surveys to check for signs of spalling and chipping of groove edges, and ravelling of groove surface materials.Maintaining of sufficient macrotexture depth – To guard against loss of tire-pavement skid resistance in wet-weather, ICAO requires that a minimum macrotexture depth of 1 mm be maintained for runway pavements (ICAO, 2013). Groove dimensions at 3, 6 and 9 m from the runway centreline are monitored and the equivalent texture depths are calculated. For the type of pavement mixture used at the Singapore Changi Airport, it was found that a minimum depth of 3.5 mm texture depth must be maintained to meet the ICAO texture depth requirement.Minimum skid resistance requirement – In view of the high aircraft traffic with about 7,000 aircrafts landing or departing each week, skid resistance test is conducted at least once a week at the Singapore Changi Airport. The grooved runway pavements are tested for friction coefficient at 65 and 95 km/h using Saab Friction Tester. The action level of friction coefficient is set as 0.50 and 0.34 for the two speeds respectively.Rubber removal procedure – Effective removal of rubber deposit is required to restore the pavement friction for safety aircraft operations. Improper rubber removal techniques may not restore pavement friction sufficiently, and some could even cause damage to pavement surface materials. Currently, the high-pressure water blasting method is being used at the airport, although study is still on-going on the most appropriate technique to effectively remove rubber deposits within and outside of the grooves.
Performance of tire-asphalt pavement adherence according to rubber removal on runways
Published in International Journal of Pavement Engineering, 2022
Renata de Souza Sales, Francisco Heber Lacerda de Oliveira, Lucius de Albuquerque Prado
Runway rubber removal is a maintenance function employed to ensure safe landing areas for aviation operations. Rubber deposits accumulate on runway areas where aircraft tires touchdown and braking occur. This tire rubber builds up occludes pavement microtexture and macrotexture, causing a significant loss in available skid resistance during wet conditions (Pullen et al.2013).