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RSS FeedsMaterials, Vol. 12, Pages 2288: Fractal Analysis of the Fracture Evolution of Freeze-Thaw Damage to Asphalt Concrete (Materials)

 
 

17 july 2019 20:00:06

 
Materials, Vol. 12, Pages 2288: Fractal Analysis of the Fracture Evolution of Freeze-Thaw Damage to Asphalt Concrete (Materials)
 


AC (asphalt concrete)-13, as the main material used in pavement construction, has been applied widely in seasonal frozen areas. In order to understand the fracture mechanism in the freeze-thaw (F-T) damage process, the mesoscale structure of AC-13 is obtained by computed tomography (CT). The fractal dimension of cracks is used as a damage evaluation index. Most previous studies have only focused on the fractal dimensions of whole cracks, while ignoring the fractal tectonic process and the self-similarity degree of a single fracture. Therefore, in this study, the intrinsic mechanism of fractures and damage were investigated. In addition, the critical crack stress and fracture toughness models of a single fracture in a freeze-thaw damage process are established for AC-13. The results indicate that in terms of the critical crack stress and fracture toughness, with the increase of F-T times, there is an obvious decreasing trend. The fracture model can effectively describe the fracture toughness calculated by ABAQUS in the process of freeze-thaw cycles.


 
180 viewsCategory: Chemistry, Physics
 
Materials, Vol. 12, Pages 2289: Band to Band Tunneling at the Zinc Oxide (ZnO) and Lead Selenide (PbSe) Quantum Dot Contact; Interfacial Charge Transfer at a ZnO/PbSe/ZnO Probe Device (Materials)
Materials, Vol. 12, Pages 2287: Prediction of Crack Formation for Cross Wedge Rolling of Harrow Tooth Preform (Materials)
 
 
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