Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Experimental and Numerical Investigation of Dilation Behavior of Asphalt Mixture
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 material composition and test conditions. A digital specimen of an asphalt mixture was established by a discrete-element modeling (DEM) and incorporated aggregate of irregular shape, the asphalt mortar phase, and the air void phase. Results show that the virtual specimen exhibited similar dilatancy to the lab-compacted specimen in triaxial compression tests.
Experimental and Numerical Investigation of Dilation Behavior of Asphalt Mixture
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 material composition and test conditions. A digital specimen of an asphalt mixture was established by a discrete-element modeling (DEM) and incorporated aggregate of irregular shape, the asphalt mortar phase, and the air void phase. Results show that the virtual specimen exhibited similar dilatancy to the lab-compacted specimen in triaxial compression tests.
Experimental and Numerical Investigation of Dilation Behavior of Asphalt Mixture
Yang, Jun (Autor:in) / Zhang, Jiantong
2016
Aufsatz (Zeitschrift)
Englisch
Experimental and Numerical Investigation of Dilation Behavior of Asphalt Mixture
| Online Contents | 2017
Study on the shear dilation behaviour of asphalt mixture
| Taylor & Francis Verlag | 2015
Dilation Behavior of Hot Mix Asphalt Under Triaxial Loading
| Taylor & Francis Verlag | 2007