Calculation of the equivalent temperature of pavement structures

Abstract

Due to the difficulties of the description of temperature variation, rating of asphalt pavement structures respecting fatigue is made on equivalent temperature. In general, equivalent temperature is calculated according to average and weighted air temperature. It is proven, based on processing numerous data provided by the temperature detectors laid in the pavement structures as well as determination of the partial fatigue values, which the present method used to calculate the equivalent temperature results in data losses. Furthermore, it is proven, that pavement structure temperature based on air temperature can be determined only to limited extent. Knowledge of temperature distribution of the pavement structure provides the possibility of more accurate design.

Determination of master curves for asphalt mixtures by means of IT-CY tests^1

“…According to our hopes during the test we proved, that the master-curve can be reconstructed with relatively simple resources, thus establishing the basics for later and more substantial engagement in this issue in Hungary (Fi-Pethő [1]). …”

New Hungarian Mechanistic-Empirical Design Procedure for Asphalt Pavements

“…Due to temperature dependence, determination of the residual service life value of a multi-layered pavement model would require a long and complicated series of calculations because of the different values of asphalt modulus. Instead, the present method -utilizing the Miner's hypothesis -uses equivalent temperatures and asphalt modulus values for each layer, which, if they remain unchanged throughout the whole year, would result in the same fatigue damage in the pavements as the combined effect of the strains of the different asphalt moduli of different temperatures (Fi & Pethő, 2008;Pethő, 2008).…”

The effect of VIATOP plus FEP on the stiffness and low temperature behaviour of hot mix asphalts

“…Stiffness depends highly on temperature and varies with depth from the surface in a pavement structure [10]. The effect of stiffness on fatigue performance and thus service life of a layer has also been shown [11].…”