Maximum and minimum asphalt pavement temperature models to determine asphalt type based on performance graded in tropical climate environments

Asphalt is a viscous-elastic material, where structural capacity can vary due to temperature variations and is influenced by the climatic environment. Asphalt pavement with good durability, one of which is determined by the Performance Grade (PG) of asphalt. Several models have been developed to estimate asphalt PG, including the SUPERPAVE model. This study aims to develop a maximum and minimum asphalt pavement temperature model to determine PG asphalt in tropical climates. Observations of air temperature (T Amb), humidity (RH), and asphalt pavement temperature at several depths were carried out on 4 national roads on the Bali Islands using thermocouple sensors with a data logger and SAGA Technology program application, continuously for 7 x 24 hours with recording at 30-minute intervals. There are 960 T Amb, RH, minimum surface temperature (T00 Min), and maximum pavement temperature at a depth of 20 mm (T20 Max) data, and linear regression models have been T00 Min = 17.357 + 0.577 T Amb -0.078 RH and T20 Max = 34.163 + 0.650 T Amb – 0.177 RH. The developed model has adequate accuracy, with the MAPE values less than 10%. If the model is compared to the SUPERPAVE model, it has better accuracy. It is hoped that the developed model will be useful as a reference for determining the maximum and minimum temperatures for road pavement in tropical climates.