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- W613602012 abstract "The aim of this research project is to develop a procedure that is able to estimate the monetary value of asphalt pavements already in use for a typical life time of 15 years regarding given conditions like traffic and climate. Basic coherences for a subject related estimation of the structural material value as well as its monetary evaluation on the basis of an analytic prognosis procedure are made. The necessary material properties (deformation and fatigue parameters) are determined by laboratory tests. Several sections of federal highways in Germany with different asphalt construction were investigated. Drill cores were used to determine the deformation characteristics and the fatigue functions. Therefore indirect tensile tests were performed. The same test specimens were used to perform multistage tests (E-modulus) with a frequency of 10 Hz. The test program was comprised of four temperatures and three tension levels. The fatigue behaviour of the test specimens was tested with a frequency of 10Hz and at only 20°C at three tension levels each. One possibility for the estimation of the remaining life time is based on a calculation procedure. With this procedure the evaluation of the asphalt construction on the basis of material parameters (deformation characteristic values, fatigue parameters, climatic data and volume of traffic) is possible and results in necessary layer thicknesses and the rutting sensibility of the asphalt layers (deviatoric stresses). In reversal of this procedure, the moment when cracking starts and thus the end of the service life can be estimated. An instrument therewith is available that enables to predict the remaining time until failure of flexible pavement construction at any time. With this knowledge an optimal pavement management is possible. To confirm this evaluation method (respectively, predictions concerning the behavior of the states of fatigue can only be made by further testing) further drilling cores are at present being examined by applying the same test program as described in this project. The obtained results, pavement design calculations and evaluation of remaining substance are presented and discussed in this paper." @default.
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- W613602012 date "2011-01-01" @default.
- W613602012 modified "2023-09-23" @default.
- W613602012 title "Determination and evaluation of the remaining substance of flexible pavement (asphalt) constructions after long-term traffic loading" @default.
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