Research on Fracture Performance of Large-Diameter Hydraulic Asphalt Concrete Based on DIC Technology
The fracture of hydraulic asphalt concrete is mainly characterized by open type(Type I).To study the fracture performance of large-diameter hydraulic asphalt concrete under different oil stone ratios,this paper conducts pre-crack small beam bending tests and analyzes the horizontal strain of the specimens from loading to failure based on digital image correlation(DIC)technology.The results indicate that different oil stone ratios have no significant impact on the fracture performance of large-diameter hydraulic asphalt concrete within the experimental range.The changes in critical stress intensity factor and J-integral fracture toughness of asphalt concrete under different oil stone ratios are not significant.The use of DIC technology can better reflect the strain situation of the specimen during the fracture process,providing a quantitative basis for the fracture performance of asphalt concrete.
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