Study on the rubber-modified asphalt mixtures¡¯ cracking propagation using the extended finite element method

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• 作者：Hainian Wang ; Chen Zhang ; Lian Yang ; Zhanping You
• 关键词：Rubber-modified asphaltic mixtures ; Extended Finite Element Method ; Notched semi-circular bending testing ; Numerical simulation ; Crack propagation
• 刊名：Construction and Building Materials
• 出版年：2013
• 出版时间：October, 2013
• 年：2013
• 卷：47
• 期：Complete
• 页码：223-230
• 全文大小：1713 K

文摘

Crumb rubber modified (CRM) asphalt mixtures have been widely used in highway asphalt pavement due to its environmental advantages and enhancement of mechanical performance. Numerical simulation analysis on rubber-modified asphalt mixtures¡¯ crack propagation has attracted more attention when characterizing the low temperature performance of asphalt pavement in recent years. However, in past numerical simulation processing, most researchers took the rubber-modified asphalt mixtures as a linear elastic material, which is incompatible with the viscoelastic characteristics of the rubber-modified asphalt mixtures. Thus, it cannot fundamentally evaluate the fracture characteristics of the rubber-modified asphalt mixtures. Based on this, viscoelastic mechanism of the rubber-modified asphalt mixtures are considered in this paper. The paper studied simulation of the rubber-modified asphalt mixtures crack growth using Extended Finite Element Method (XFEM), based on the notched semi-circular bending (SCB) test. This study investigated the stress distribution characteristics during the crack growth, the path of the crack growth, and the effect on the rubber-modified asphalt mixtures¡¯ fracture characteristics using the different rubber content. Thus, it can provide a theoretical guide for the forecast and control of the fracture damage caused by crack growth, which is one of the main early distresses of rubber-modified asphalt pavements.