Preparation of High Performance Hydrophobic Concrete Material and Experimental Study on Its Corrosion Resistance

Abstract

The durability of reinforced concrete structure will be threatened because of corrosion. In view of this situation, in this study, from the perspective of super hydrophobic to improve the durability of concrete materials, a high-performance super hydrophobic concrete material is proposed. The material uses the principle of "binary coordination," which mixes fluorosilane and steel fiber into the composition of concrete, and sets up a copper net on its surface, thus forming a micro-nano-composite structure, making the concrete have a super hydrophobic surface. When characterizing the proposed concrete material, the contact angle of super hydrophobic concrete is 158.3°, rolling angle is 7.6°, and the contact between droplets and concrete conforms to Cassie Baxter model. In the study of corrosion resistance, standard maintenance environment and oxygen diffusion dry wet cycle environment are studied. During the test, a long-term immersion method is used, and the immersion period is set to (30 d, 50 d, 80 d). Compared with different environments, it is found that super hydrophobic concrete has strong corrosion resistance, which shows that the doping of fluorosilicane and steel wire can significantly improve the impermeability of concrete.