Abstract:Chloride ion erosion is the main cause of long-term performance degradation of reinforced concrete structures, which is closely related to the impermeability and tensile properties of the protective layer. In order to improve the durability of concrete, the basalt fiber reinforced concrete rapid chloride ion erosion test and the splitting tensile strength test are carried out. Through the analysis of the performances of basalt fiber reinforced concrete with different fiber contents and lengths, the optimal fiber content and the physical dimension to improve the chlorine ion penetration resistance and the splitting tensile property of the concrete are determined. The results show that when 0.1% of 9 mm-long fiber is added and the length-to-diameter ratio is about 529∶1, the short-cut basalt fiber will significantly improve the chlorine ion penetration resistance and the splitting tensile strength of the concrete. The bridging effect of the fiber improves the destructive behavior of the concrete and increases the tensile strength of the concrete. And at the same time, the impermeability of the fibers makes the chlorine ion transmission path blocked, which improves the porosity within the concrete, and makes the concrete anti-permeability improved.
