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ÍNDICEÍNDICE
““Maintenance Practices and Standards Maintenance Practices and Standards on Pavements at Mexican Airports”on Pavements at Mexican Airports”
MScE Rodolfo Téllez Gutiérrez
6th Symposium on Pavement Surface Characteristics6th Symposium on Pavement Surface Characteristics
Portoroz, Slovenia, EuropePortoroz, Slovenia, Europe
October 20th to 22nd, 2008
INTRODUCTION
SOP, SAHOP, S.C.T.
SCT – ASA
SCT – DGAC
Concessioned Airports Groups
Dirección General de Aeropuertos.
Desing and construction of airports, major and specialized maintenance, until 1988.
26.- Aeropuertos y Servicios Auxiliares.
Operation and Administration, minor maintenance, remodeling, enlarging.
85.- Dirección General de Aeronáutica Civil.
Laws, Rules of Aircraft Operations, Licenses for Pilots, Official permits and regulations, etc.
35.- AICM, GAP, OMA, ASUR.
Mexican Airports Infraestructure 2008
Special problems
Mu-meter Bonded rubber
Special problems
Hydroplanning effect on Airports Pavements during heavy rain.
Coefficient of friction very critical.
Hveem California
Special problems
Grooving System
New Mexican proposal for Coefficient of FrictionAIRPORT PAVEMENT SURFACES
Measurements on all the Runway length
a) Once a year evaluation
b) (1) in Center Line
c) (4) at 3 and 6 m on each side
d) Method ASTM E 670
e) Equipment Mu-Meter or similar
Minimum C.F. values
New Mexican Proposal 2007
Speed Test (Km/h)
Tire Pressure(k Pa)
Wet Surface (mm)
C. F. minimun
New or OverlayedPavement
Program of
correct. maint.
Warning levelnotice
65 70 1,0 0,72 0,52 0,42
95 70 1,0 0,66 0,38 0,26
BREAKING EFFICIENCYCoeff. of Friction Efficiency Safety
0,50 or more Good √
0,40 to 0,49 Fair √
0,30 to 0,39 Poor unsafe
Less than o,30 Bad unsafe
Key Notes:1) Until now, the official value for C. F. is 0,5 min (wet and dry)2) The new proposal (2007) is in discussion and when approved (2008) will
require for all Airports minimum values of 0,66 and 0,72 for wet pavement critical condition.
PROFILE INDEX ACCORDING TO THE NEW MEXICAN STANDARDS FOR HIGHWAYS
NEW HIGHWAYSProfile index
(cm/km)Bonus/Penalty Factors
4,0 ó menos
Bonus
+ 0,05
4,1 A 5,5 + 0,04
5,6 A 7,0 + 0,03
7,1 A 8,5 + 0,02
8,6 A 10,0 + 0,01
10,1 A 14,0 0
14,1 A 16,0
Penalty
0,02
16,1 A 18,0 0,04
18,1 A 20,0 0,06
20,1 A 22,0 0,08
22,1 A 24,0 0,10
More than 24,0 Corrective maintenance
Norma N.CSV. CAR.3.02.005.04 EXISTING HIGHWAYS
Profile index(cm/km)
Bonus/Penalty Factor
10,0 o menos
Bonus
+ 0,05
10,1 A 14,0 + 0,04
14,1 A 18,0 + 0,03
18,1 A 22,0 + 0,02
22,1 A 26,0 + 0,01
26,1 A 31,0 0
31,1 A 34,0
Penalty
0,02
34,1 A 37,0 0,04
37,1 A 40,0 0,06
40,1 A 43,0 0,08
43,1 A 46,0 0,10
More than 46,0 Corrective maintenance
New Mexican proposal for Profile IndexAIRPORT PAVEMENT
Measurements on all the Runway length:
a.- (1) in Center Lineb.- (10) at 2, 4, 6, 8 and 10 meters on each side covering 20 m widthc.- Once a year evaluation
Standard or Specification
Proposed Value
AverageP. I.
(cm/km)
Year
New Pavements (Runways)
max 10,0 2007
Existing Pavements max 15,0 2007
More than 15,0 Pavement must be treated
with corrective maintenance.
Key Notes:1) Until 1990, the official standard in Mexico had a maximum Value of P. I. = 30 inch/mile (47 cm/Km)2) From 1992, the standard value was improved requiring a maximum P. I. = 15 inch/mile (24 cm/Km)3) The new mexican proposal (2007) now in study and discussion, we expect to have it approved along 2008 and will require for all medium and large airports a maximum “Profile Index of 10,0 and 15,0 cm/Km”
AICMLand operation (near of saturation)
AICMActual Layout
AICMLongitudinal non-uniform settlements history
AICMCompensated Pavement Section
AICMCompensated Pavement Section works for the first runway
AICMProposed layout
