Experimental Study on Durability of Hybrid Fiber-Reinforced Concrete in Deep Alluvium Frozen Shaft Lining

This article proposes hybrid fiber-reinforced concrete (HFRC) mixed with polyvinyl alcohol fiber (PVA) and polypropylene steel (FST) as a wall construction material to improve the bearing capacity durability of frozen shaft lining structures in deep alluvium. According stress characteristics engineering environment lining, strength, impermeability, freeze–thaw damage, corrosion resistance are taken evaluation control indexes. The C60 commonly used freezing is selected reference group. Compared group, test results show that compressive strength HFRC similar concrete, but its splitting tensile flexural higher; according test, optimum content 1.092 kg/m3 PVA 5 FST obtained. impermeability results, mixing can concrete. For cycle frost concrete; based on 120 days sulfate will