2.3 Pavement Type and Pavement Elevations
The typical types of pavement for the airfields are summarized in Figures 8 to 10, consisting of runways, taxiways and taxilanes. Rigid pavements (Pavement Quality Concrete, PQC) are used in the aircraft stands and the flexible pavements (asphalt concrete, AC) are adopted in taxiways, runways and taxilanes. In principle, the Designer had chosen the flexible pavement for taxiing areas, so that future adjustment on the pavement surface can be made easily if the pavement settles unevenly. Different types of asphalt concrete, normal AC and modified AC (polymer modified asphalt), had been used depending on the requirements and suitability.