Abstract
AbstractDilatancy behavior plays a key role in asphalt mixture rutting. Therefore, it is important to understand the mechanism of dilation for asphalt pavement design. In this study, material dilation was approached by considering different stress–dilatancy models. The uniaxial compressive test was employed to measure the dilation of asphalt mixtures under various test temperatures. Radial and volumetric deformations of asphalt mixture specimens were obtained in a multifunctional material system using special radial displacement transducers. The testing results were interpreted through dilatancy theory. The experimental results show that the softening point of asphalt played an important role in the dilation behavior of asphalt mixtures. Analysis suggests that the dilation was governed by the kinematic constraints imposed by the aggregate skeleton. The constitutive relationship of dilation of asphalt mixtures that can be used to describe both the contraction and dilation is discussed by considering materi...
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