ABSTRACT
ABSTRACT: A complex three-dimensional stress field is generated in pavement structure when a wheel passes. However, few experimental results on the cyclic multidirectional behavior of bituminous mixtures are available. An experimental triaxial test device has been developed at the ENTPE/DGCB laboratory to better understand this three-dimensional behavior. The device allows applying, on cylindrical specimens, monitored radial pressure and axial loadings. In order to make experiments easier, the innovative triaxial cell has been divided into two parts which are fixed around the specimen. Constant strain-rate tests with constant confinement pressure have been performed at 20°C. Complex modulus and complex Poisson’s ratio have been obtained for different axial strain levels.
