关键词: 水工沥青混凝土, 小梁弯曲试验, 力学性能, 弯曲性能

Abstract: In this work, bending tests on hydraulic asphalt concrete beams under temperature of -30 °C to 25 °C are carried out, and the influence of temperature on mechanical properties of hydraulic asphalt concrete panels is examined. Results show that, (1) the stress-strain characteristics of the concrete is closely related to temperature. In the range of - 30 °C to 0 °C, the stress-strain curve is nearly linear, and the stress of the specimen reaches the peak first and then plummets, showing a brittle failure. In the range of 0 °C to 25 °C, the specimen undergoes a certain degree of plastic deformation after its peak stress, and then it fractures, showing a ductile failure; (2) As temperature rises, both flexural strength and flexural modulus of the concrete decrease gradually, and deformation capacity increases; as temperature drops, peak strain decreases; (3) For concrete under different temperature conditions, an empirical formula is put forward in this study and it calculates the variations in flexural properties to a good agreement with the test results.

Key words: hydraulic asphalt concrete, small beam bending test, mechanical property, bending performance