Abstract: The effects of different basalt fiber content on the sulfate resistance of concrete were studied by testing the corrosion resistance coefficient of strength, the mass-change rate and volume expansion ratio of concrete.Meanwhile, the impermeability and pore structure of the concrete with different basalt fiber content were studied.The results show that the incorporation of 0.1%-0.5%basalt fiber can reduce the total pore volume, reduce the content of harmful large pores and more hazardous holes and optimize pore structure.Therefore, the sulfate resistance and impermeability of concrete were improved to different extents.Meanwhile, the sulfate resistance and impermeability of concrete with 0.3% fiber content are best.

Key words: basalt fiber;dosage;sulfate resistance;impermeability