VERY THIN ASPHALT CONCRETE AS RUNWAY WEARING COURSE. QUALITY CONTROL BY MEANS OF MICROSCOPY TECHNIQUES

In 1998 the first part of the main runway, 04L-22R, at Copenhagen Airport was successfully tendered for the resurfacing of the approximately 30.000 m wearing course. The works included the milling off of the top 20 mm of the old wearing course and the construction of a new 20 mm thick wearing course type where the asphalt paving machine is spreading 1,2 - 1,4 kg/m2 of emulsion in front of the open graded asphalt concrete being paved. The rest of the runway has successively been resurfaced during the period from 1999 to 2002 using the same method. The tender documents were based on the new type of specifications, which are based purely on functional requirements in this case including end-performance requirements after an eight-year warranty period. Amongst other topics the requirements used in the specifications are described below. During construction of the new wearing course, the client controlled the work intensively in order to be able to evaluate the actual quality of the new pavement and in order to be able to predict the development of the performance of the pavement using the first test results as a platform for the comparison with future measurements. For these purposes traditional laboratory test methods as well as new test methods like thin section microscopy were used. This has placed Copenhagen Airport A/S in a position making it possible for Copenhagen Airport to assess whether the maintenance methods and the maintenance efforts of the contractor during the eight-year warranty period are satisfactory or not in relation to the functional requirements of the new wearing course. The output of the traditional laboratory analysis as well as the output of the analysis of thin section microscopy during the four-year period is described below. The use of this pavement type has resulted in unexpected advantages. One of the unexpected advantages is that compared to conventional pavements for runways almost no rubber from the wheels of the aircraft fastens to the pavement surface and therefore no derubberisation work has been necessary after four year's use. Another unexpected advantage is that much less de-icer material is needed for the de-icing of the pavement compared to traditional runway pavements.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/8791177154
• Corporate Authors:

  DANISH ROAD INSTITUTE

  ELISAGAARDSVEJ 5
  ROSKILDE,   Denmark  DK-4000
• Authors:
  • Korsgaard, H C
  • Buenner, H H
• Conference:
  • INTERNATIONAL SOCIETY FOR ASPHALT PAVEMENTS, NINTH INTERNATIONAL CONFERENCE ON ASPHALT PAVEMENTS, AUGUST 17 - 22, 2002. PROCEEDINGS
• Publication Date: 2003

Language

• English

Media Info

• Features: References;
• Serial:
  • Volume: 2

Subject/Index Terms

• TRT Terms: Airport runways; Asphalt concrete; Methodology; Microscopes; Quality control; Wearing course (Pavements)
• Uncontrolled Terms: Quality
• ITRD Terms: 4967: Bituminous mixture; 9102: Method; 6790: Microscope; 9063: Quality; 1038: Runway; 2980: Wearing course
• Subject Areas: Aviation; Pavements;

Filing Info

• Accession Number: 00967598
• Record Type: Publication
• Source Agency: Danish Road Institute
• ISBN: 87-91177-15-4
• Files: ITRD
• Created Date: Jan 13 2004 12:00AM