Research on anti-chloride ion penetration property of crumb rubber concrete at different ambient temperatures

The corrosion of steel bars in concrete is one of the most important factors that affect the durability of concrete structures, which can be caused by several factors, including marine environments, deicing salt environments, saline and alkaline land, and saline pollution in industrial environments. Research has shown that the addition of crumb rubber can increase the capillary saturation of concrete and reduce the corrosion degree of steel bars in concrete, and with the increase of crumb rubber content, the weight-loss rate of steel bars decreases. The effects of temperature on its resistance to chloride-ion erosion and the durability of crumb rubber concrete are analyzed based on concrete-accelerated corrosion tests by controlling the ambient temperature. The results showed that crumb rubber concrete has high resistance to chloride-ion erosion, especially when the temperature is lower than 20 °C. The concrete ductility factor of crumb rubber concrete with chloride-ion corrosion at different temperatures is generally higher than that of ordinary concrete, indicating that crumb rubber concrete has a better energy-absorption property. It is shown that the crumb rubber concrete has a different durability with the test environment temperature, and can provide a reference for the application of crumb rubber concrete in anti-chloride ion penetration.