Variable angle of insulated shotcrete under different loading rates and temperature and humidity cycles- shear test and analysis.

At a shear angle of 54°, the rates of 1 mm/s, 3 mm/s and 5 mm/s showed a decreasing trend, and the rate of 5 mm/s decreased by 13.44% compared with the rate of 1 mm/s.

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For the heat-insulating shotcrete, firstly, we carried out the concrete variable angle shear test under different loading rates, which concluded that the shear rate and peak shear stress showed a trend of increasing and then decreasing; as the angle increases, the different rates have a greater impact on the peak shear stress of the specimen.

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