bitumen (PG) is a type of bitumen which is designed by its performance at different temperatures.
There is an algorithm used to obtained the temperature of the pavement by the
air temperature. This algorithm which is given by long-term pavement
performance (LTPP) calculated the highest and lowest temperatures of pavement.
There is a specific method which help to choose the proper PG asphalt binder
for different climate and conditions. The grade of this bituminous asphalt
consist of two parts in notation, the first number is high pavement temperature
the second number is the low pavement temperature. The minimum pavement
temperature is used to prevent thermal cracking in cold weather condition. Performance
grade binder PG 64-10 should 7 days performed at maximum pavement temperature
of 64 °C and minimum pavement temperature of -10 °C. PG 52-28 mean it can 7
days meet maximum pavement temperature
of 52°C and minimum pavement temperature of -28°C. This grade of performance
bitumen mostly used in pavement construction, pavement rehabilitation, crack
sealing, spray applications and pavement protective membrane .