| Summary: | In this paper, the durability and mechanical properties of basalt fiber reinforced concrete under sodium sulfate erosion were studied. The concrete with 0%, 0.05%, 0.1%, 0.2% and 0.3% basalt fiber were respectively soaked in 5.0% sodium sulfate solution and clean water for 90 days, and the observations and records were used to analyse the changes in the water absorption rate of the test pieces and conduct compression tests. The main conclusions are as follows: The basalt fiber has little effect on the bearing capacity of concrete, but can improve the deformation capacity of concrete to certain extent. Under the erosion of sodium sulfate, basalt fiber can effectively lower the porosity growth rate, while excessive fiber adversely affects the durability, with the fiber content of about 0.1% leading to the best result. In view of the difficulty in basalt fiber dispersion, this paper put forward “Powder Particle Basalt Fiber Dispersion Method”. Therefore, this research will provide some theoretical foundation for engineering application of basalt fiber.
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