Study on the Freezing and Thawing Damage of Concrete Pavement under the Action of Deicing Agent

Abstract

In the winter, large-scale passenger airports in northern China, aircraft deicing is a common job. This is because in the rainy and snowy weather in winter, the surface of the aircraft will freeze, and the aircraft is strictly forbidden to take off in the icing state. Therefore, there is a special de-icing platform in the airport to de-ice the aircraft. The deicing fluid containing chemical substances stays on the surface of the de-icing concrete, which will cause the concrete aggregate to peel off and crack, forming FOD and endangering flight safety. Therefore, this paper studied the properties of ethylene glycol deicing fluid and the freeze-thaw cycle damage test of concrete under the action of deicing fluid. The test results show that the low concentration deicing fluid has a greater damage to concrete freeze-thaw. In addition, the article uses finite element software to simulate the two-dimensional concrete frost heaving damage. The simulation results show that the damage propagation in the crack will be along the weak inner surface of the concrete, mainly along the concrete aggregate; under the same conditions, the influence of the depth of the crack on the concrete damage is greater than the impact of the crack width on the concrete damage.