Research on the Influences of Resistivity for Steel Fiber Reinforced Concrete

In the subway engineering, increasing the resistivity of main structural material can improve the corrosion resistance to the stray current and the durability of structure. It is greatly significance to increase the resistivity of concrete by optimizing its mix proportion and realizing the influence of raw material on resistivity. Furthermore, it can also extend the service life of structure. This paper presents orthogonal experimental results from tests conducted on 9 groups of 27 specimens to evaluate the influence of three parameters such as steel fiber content, fly ash content and corrosion inhibitor content on the resistivity of steel fiber reinforced concrete (SFRC). Experimental results analyzed with range analysis and variance analysis indicate that fly ash content has a significant effect on the resistivity of SFRC, while both of steel fiber content and rust inhibitor content have not obvious. Analytical results provide an evidence for the application of SFRC in subway environment.