Abstract
The main purpose of this paper is to model the master curve of dynamic modulus |E*| for Hot Mix Asphalt mix designed with aggregate from Senegal named basalt of Diack and quartzite of Bakel. The prediction model used is the Witczak model, used in the Mechanistic-Empirical Pavement Design Guide. A study has been conducted in the Laboratory of Pavements and Bituminous Materials. Six different HMA (BBSG 0/14 mm) were subjected to complex modulus test by tension-compression according to the European or Canadian procedure using the same range of temperatures and frequencies. For each mixture studied the uniqueness of modulus curves in the Cole-Cole or in Black diagrams have shown that the asphalt mixes are thermorheologically simple materials and the Canadian test process is suitable for determining the HMA complex modulus mix designed with the aggregates from Senegal. This implies their tender with the principle of time-temperature equivalence. The test results were used to model the master curves of HMA studied. A correlation with the results of dynamic modulus measured have shown an accuracy of R2 = 0,99 and p = 0,00 in STATISTICA software, which allows to conclude that the sigmoidal model has good modeling of the dynamic modulus.
Highlights
Bituminous materials such as surface layer, have a viscoelastic behavior that is intermediate between the behavior of a perfect elastic solid and that of a Newtonian liquid
The main purpose of this paper is to model the master curve of dynamic modulus |E*| for Hot Mix Asphalt mix designed with aggregate from Senegal named basalt of Diack and quartzite of Bakel
A correlation with the results of dynamic modulus measured have shown an accuracy of R2 = 0,99 and p = 0,00 in STATISTICA software, which allows to conclude that the sigmoidal model has good modeling of the dynamic modulus
Summary
Bituminous materials such as surface layer, have a viscoelastic behavior that is intermediate between the behavior of a perfect elastic solid and that of a Newtonian liquid (viscous). The deformation of such a material is a function of the applied stress and time. In a linear viscoelastic behavior, the material properties are assumed independent of the applied stress or strain levels. The analysis of the linear viscoelastic behavior under one-dimensional loading of a material is done either by using the rheological models, by the creep loading or steady state dynamic loading (Huang, 2004 and Papagiannakis & Masad, 2007). The absolute value of the complex modulus is commonly referred to as the dynamic modulus (Huang, 2004, Yoder & Witczak, 1975, DiBenedetto & Olard, 2003, DiBenedetto & Corté, 2005 & Dougan, Mahoney & Hansen)
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