Author(s)

Kourachia Said Ali, Yang Li^*, Lingfeng Ye

School of Civil Architecture and Environment, Hubei University of Technology, Wuhan, China.

This study investigates the compressive and tensile properties of basalt fiber-reinforced concrete (BFRC) after ultra-low-temperature freeze-thaw cycles. Scanning electron microscope (SEM) analysis was conducted to examine the deterioration mechanisms caused by freeze-thaw cycles and sulfate erosion. The results show that compressive and tensile strengths increase with basalt fiber dosage. The optimal dosage is 0.2%. With longer exposure to sulfate erosion, both strengths decline significantly. Basalt fibers effectively bridge cracks, control expansion, enhance compactness, and improve concrete performance. Ultra-low-temperature freeze-thaw cycles and sulfate erosion cause rapid crack growth. Sulfate erosion produces crystallization products and expansive substances. These fill cracks, create pressure, and damage the internal structure. Freezing and expansion forces further enlarge voids and cracks. This provides space for expansive substances, worsening concrete deterioration and reducing its performance.

Basalt Fiber Concrete, Ultra-Low Temperature Freeze-Thaw Cycle, Compressive Properties, Splitting Tensile Properties, Strength Deterioration Model

Ali, K. , Li, Y. and Ye, L. (2025) Study on Sulfate Erosion Resistance of Basalt Fiber Concrete after Ultra-Low Temperature Freezing and Thawing. World Journal of Engineering and Technology, 13, 80-95. doi: 10.4236/wjet.2025.131006.