Research on the Corrosion Resistance of Basalt Fiber Concrete

Concrete corrosion is one of the main causes of concrete durability deterioration, and concrete corrosion issues cause huge economic losses every year. To reduce the economic losses caused by concrete corrosion, it is of great significance to study the corrosion resistance of Basalt Fiber concrete.

Currently, research on the corrosion resistance of basalt fiber concrete mainly involves immersing concrete specimens in different corrosive solutions for a certain period of time and analyzing the corrosion resistance of basalt fiber concrete through experiments. Experimental studies have found that the compressive strength and flexural strength of basalt fiber concrete decrease as the concentration of the corrosive solution increases, and they also decrease with the increase of corrosion time in a corrosive solution of the same concentration. The addition of basalt fibers can improve the compressive and flexural strength of concrete in a corrosive environment. However, adding an excessive amount of basalt fibers will lead to a decrease in the concrete's compressive and flexural strength. Some researchers have placed basalt fiber concrete specimens in a sodium sulfate solution for 90 days and found that the addition of basalt fibers can effectively improve the concrete's crack resistance, thereby enhancing its corrosion resistance. Under these conditions, the best crack resistance was achieved with a basalt fiber volume content of 0.1%. At the same time, basalt fiber concrete specimens were placed in a sodium chloride solution for 90 days, 180 days, and 270 days. A comparison showed that the addition of basalt fibers can inhibit the development of early cracks in concrete, and as the corrosion time increases, the best crack resistance is achieved with a basalt fiber volume content of 0.1%. The addition of an appropriate amount of basalt fibers can enhance the concrete's resistance to corrosion from sodium sulfate and sodium chloride. Compressive tests on specimens soaked in a corrosive solution found that the addition of basalt fibers can improve the concrete's deformation capacity and ultimate bearing capacity, with the best effect at a basalt fiber volume content of 0.1%.

In summary, the addition of basalt fibers can improve the corrosion resistance of concrete. However, current experiments mainly focus on single corrosive conditions (such as sulfate or chloride corrosion), and further discussion is needed for research on mixed solutions of two or more corrosive substances.