Analysis of temperature and moisture influence on asphalt pavement strength

Abstract

Durability of asphalt pavement mainly depends on pavement structural strength. Environmental conditions (temperature, moisture, intensity of sun, etc.) influence variation in asphalt pavement strength during the year. In order to analyze behaviour of asphalt pavement structure under Lithuanian climatic conditions, taking into account temperature and moisture, as one of the most important climatic factors influencing structural strength of road asphalt pavement, the experimental research was carried out. The results of experimental research encourage determining pavement strength and Eo modulus dependence on moisture and surface temperature, measured by the Falling Weight Deflectometer (FWD) in different seasons. To evaluate the values of road pavement strength and Eo modulus, the obtained measuring results were reduced to their equivalent values under standard temperature and load. Thus, the values of Eo modulus were adjusted to the standard temperature of +20 °C, using the revised temperature correction factor.