Abstract:Through microwave heating test, freeze-thaw cycle test, SEM test and MIP test, the microwave heating efficiency, freeze resistance and microstructure of silicon carbide concrete before and after the freeze-thaw cycle are studied. The results show that the addition of silicon carbide can improve the microwave heating efficiency and frost resistance of concrete. As the content of silicon carbide increases, the temperature rise rate of concrete gradually increases, the microwave heating efficiency increases, and the effective deicing range increases. When the content of silicon carbide is 10%, the relative dynamic elastic modulus of concrete is the largest, the mass loss rate is the smallest, and the frost resistance is the best. The addition of silicon carbide increases the internal pores of the concrete, and the freeze-thaw cycles increase the pore size of concrete, and increase the number of less harmful pores and harmful pores.