
科学技术与工程

中国技术经济学会
Effect of Surface Texture on Microwave Deicing Performance of Cement Absorbing Pavement
Hao-xiang LIU , Xuan-cang WANG , Jing ZHAO , Lü CHEN , Jun-ru REN
Science Technology and Engineering ›› 2024, Vol. 24 ›› Issue (14) : 6003 -6011.
In order to enhance the de-icing efficiency of cement concrete pavement, wave-absorbing and hydrophobic coatings were prepared, on the basis of which eight different surface textures were constructed for exploring the effects of surface textures and wave-absorbing materials on microwave warming performance. Firstly, a cement-based coating with both hydrophobic and wave-absorbing properties was prepared by adding nano SiO2. The mean texture depth (MTD) of the different textures was obtained by improving the sand-laying method through machine learning. In order to evaluate the effect of MTD on the microwave warming efficiency and homogeneity, a microwave de-icing vehicle, which is self-developed by the group, was used to carry out a microwave heating test. At the same time, common and ordinary surface textures were tested. In order to evaluate the effect of MTD on microwave warming efficiency and uniformity, the microwave de-icing vehicle developed by the group was used to carry out microwave warming test. At the same time, the water contact angle (WCA) of ordinary and coated concrete surfaces was tested, and ice-concrete ice adhesion shear test was carried out, which was used for evaluating the de-icing effect of coatings prepared in this paper. Finally, in order to ensure the anti-slip performance of the coating designed, the surface anti-slip pendulum value test was also carried out. The results show that the coupling of texture and wave-absorbing coating enhances the wave-absorbing heating efficiency of cement pavement with different degrees of texture, but the texture has a negative effect on the heating uniformity. When the MTD is increased from 0.41 mm (untreated surface) to 2.11 mm, the wave-absorbing heating efficiency of wave-absorbing coated specimens is increased by 1.42 times. At the same time, the coating also significantly enhanced the contact angle of the specimen surface, and the WCA increased from 25.5° to 104°, which in turn reduced the ice adhesion strength. When the design thickness is 1.5 mm, the coating still has good wave-absorbing properties while satisfying the slip resistance.
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