Interlayer Working Conditions Classification and Treatment Measures of Airport Asphalt Pavement Overlay

Table 7

Three-stage climate zoning of airport overlay in hot and humid area.

Level 1 zoning	Ultrahigh temperature area	High temperature area
Hottest monthly mean temperature (°C)	≥40	<40
Region of origin	Hot and humid northern tropical desert climate area	Tropical rainforest climate zone and tropical grassland climate zone
Level 2 zoning	Rainy area	Less rainfall area
average annual rainfall (mm)	≥1000	<1000
Region of origin	Tropical rainforest climate area near the equator	Other regions except tropical rainforest climate zone
Level 3 zoning	Regions with large temperature difference	Regions with small temperature difference
Average temperature difference between day and night (°C)	≥15	<15
Region of origin	Hot and humid northern tropical desert areas	Areas other than tropical desert climatic areas