Analysis of the Crack Fracture Morphology of the Asphalt Mixture under Tensile Stress Effects
Through studying the bending fracture and cleavage fracture of the asphalt mixture within the different temperature condition, confirming that the temperature influences the microscopic mechanism of mixture cracking: the fracture is relatively flat with low temperture, the destruction of the asphalt mixture is also mainly result of the brittle fracture; As the temperature rise, fracture surface becomes coarse, some part show large plastic elapse deformation. Adding fiber can reduce thickness of the asphalt membrane, improve the bonding strength of asphalt mastic, and greatly increase the ratio of the aggregate fracture and interface zone fracture, so as to enhance the asphalt mixture crack-resistance. The fracture morphology of asphalt mixture has a better reflection for its mechanical characteristics.
Guangfan Li, Yong Huang and Chaohe Chen
L. H. Zhao et al., "Analysis of the Crack Fracture Morphology of the Asphalt Mixture under Tensile Stress Effects", Advanced Materials Research, Vols. 250-253, pp. 3533-3537, 2011