Abstract
The resilient modulus (Mr) is an important parameter which describes the mechanical behavior of unbound granular materials. However, this parameter can be determined from physical properties. This paper presents the relationship between resilient modulus and physical properties of Quartzite from Bakel (GB), Basalt from Diack and Bargny and Bandia limestones. Simple and multiple regression method by stepwise are used to establish linear and nonlinear relations to predict the resilient modulus. The results showed no significant correlation for Basalt, a weak estimation of the modulus for GB and good prediction of resilient modulus for limestone. These results also showed that the model of Uzan is more suitable to predict the resilient modulus than NCHRP model and the resilient modulus is better predicted in nonlinear relationship.
Highlights
The stiffness of granular materials was characterized in Senegal as in lots of other countries in the world, by Young’s modulus (E)
The resilient modulus (Mr) is an important parameter which describes the mechanical behavior of unbound granular materials
This paper presents the relationship between resilient modulus and physical properties of Quartzite from Bakel (GB), Basalt from Diack and Bargny and Bandia limestones
Summary
The stiffness of granular materials was characterized in Senegal as in lots of other countries in the world, by Young’s modulus (E). This parameter supposed that the unbound granular materials were elastic linear. Recent studies have shown that the mechanical behavior of unbound granular materials is nonlinear elastoplastic (Huang, 2004) [1] This behavior led scientists to define the resilient modulus, which replaces Young’s modulus, in order to better characterize the real behavior of unbound materials. The resilient modulus is influenced by many factors, the most important of them are stress level and material properties (Lekarp et al, 2000 [2]). This article presents the estimation of resilient modulus of unbound materials from Senegal based on physical properties, since the physical properties are easy to obtain in laboratory and are not expensive
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