Abstract
The paper presents application of equivalent temperature for design of asphalt pavements. The calculation methods of equivalent temperature: the Shell method, the French method, the methods that use the AASHTO and the Asphalt Institute fatigue criteria were presented. The results of calculations of equivalent temperature for Polish climatic conditions were presented and discussed. It was shown that different asphalt pavement design methods and utilization of Polish climatic data resulted in various calculated values of equivalent temperature that could be used in the design process.
Highlights
One of the most important factor that influences the behaviour of the road pavements is temperature
The Shell method of calculations has shown that annual equivalent temperature that can be used for asphalt pavement design process is equal to 10°C
The method of calculations with use of the Asphalt Institute fatigue criterion has shown that annual equivalent temperature that can be used for asphalt pavement design process is equal to 17°C
Summary
One of the most important factor that influences the behaviour of the road pavements is temperature. In the case of asphalt pavements temperature affects the mechanical characteristics of the pavement [1,2,3]. In the practice of asphalt pavements design process, in most cases calculations are carried out with consideration of an equivalent constant temperature. According to French practice [4] structural design is carried out for the constant temperature, referred to as the equivalent temperature eq The equivalent temperature is defined in case when the cumulative damage in the asphalt pavement over a year, for a given temperature distribution, is equal to the damage that the pavement would undergo with the same traffic but for the constant temperature eq The equivalent temperature is determined by applying Miner’s law [5]. Calculation can be performed according to the equation (1): Neff
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