Three kinds of cement and two kinds of single-graded stone were selected to prepare the mixture of the Asphalt Plug Expansion Joint, respectively. A direct tensile test and an oblique shear test were used to analyze the cement type, mixture gradation, temperature, interfacial treatment mode, and loading rate on the influence of the tensile and shear performance of the Asphalt Plug Expansion Joint's interface. The results show that fine aggregate gradation is necessary, the interface should be kept dry and free of pollution, and the interface should be kept rough. Increasing temperature and decreasing vehicle loading speed induce a decrease of the tensile and shear strength of the interface more easily.
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