Interlaminar shear test of tunnel pavement overlays
1. Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang′an University, Xi′an, Shaanxi 710064, China; 2. Guangxi Transportation Research Institute, Nanning, Guangxi 530007, China
Abstract:The AC13 and the concrete pavement were used to simulate the original pavement, and the shear strength was used as index. The influence factors on bonding properties were evaluated by interlaminar shear test of antiskiding overlays of fiberrubber microsurfacing and NovaChip ultrathin wearing layer. The results show that the shear resistance of NovaChip ultrathin wearing layer is better than that of fiberrubber microsurfacing. The layer pollution and the surface status of bottom layer have significant effect on the overlays performance. Different overlays have different optimum spraying content and have different spray dosages at different temperatures. The optimum spraying content of fiberrubber microsurfacing is 0.8 kg·m-2 at 25 ℃.