Abstract
Sulfate corrosion is an important cause of accelerated structural failure in concrete structures in coastal and saline alkali areas. High ductility concrete has good tensile and durability properties, and is therefore widely used for the repair and reinforcement of damaged structures. To investigate the flexural performance of high ductility concrete on ordinary concrete structures in saline alkali environments, experimental methods were used to test it. The experimental data validated that the bearing capacity of the 10 mm specimen reinforced with high ductility concrete before and after corrosion is 125 kN and 117 k, respectively. After reinforcement and corrosion, the bearing capacities of the specimens were 115 kN, 129 kN, and 139 kN, respectively. In addition, sodium sulfate reduced the deformation capacity of the original specimen by 13.9 %, but after reinforcement, the deformation capacity of the specimen increased by at least 97.1 %. Compared to reinforced specimens in non saline alkali environments, the deformation capacity of reinforced specimens in saline alkali environments decreases by no more than 23 %. Compared to unreinforced specimens, the strain capacity of reinforced concrete and longitudinal bars in sulfate environments increased by at least 28.1 % and 34.5 %, respectively. However, compared to reinforced specimens in conventional environments, the strain capacity of reinforced specimens in sulfate environments decreased by no more than 19 %. The above results indicate that high ductility concrete can effectively improve the bending resistance of specimens, while also slowing down the corrosion of sulfates on specimens and effectively extending the service life of concrete structures.
Published Version
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