The application of steel fiber reinforced concrete (SFRC) in electric railways shows an obvious advantage due to its excellent mechanical properties. However, stray current induced corrosion is a potential threat to SFRC. In this study, the mechanical properties evolution of SFRC suffered from the action of stray current was investigated, including the compressive strength, flexural and splitting-tensile properties. Meanwhile, the effects of water to cement ratio (W/C), fly ash and slag on the corrosion resistance of SFRC were considered. Moreover, the corrosion mechanism of SFRC subjected to stray current was analyzed. It was found that the mechanical properties of SFRC degraded gradually under the action of stray current, since two electrolytic-cell reactions took place in the corrosion process. However, the addition of fly ash and slag can greatly improve its resistance to the attack of stray current, this makes it possible to the application of SFRC in electric railways.

中文翻译：

---

杂散电流作用下钢纤维混凝土（SFRC）的力学性能及腐蚀机理


钢纤维混凝土（SFRC）由于其优异的力学性能，在电气化铁路中的应用显示出明显的优势。然而，杂散电流引起的腐蚀是钢纤维混凝土的潜在威胁。在这项研究中，研究了杂散电流作用下钢纤维混凝土的机械性能演变，包括抗压强度、弯曲和劈裂拉伸性能。同时考虑了水灰比(W/C)、粉煤灰和矿渣对钢纤维混凝土耐腐蚀性能的影响。此外，还分析了杂散电流作用下钢纤维混凝土的腐蚀机理。研究发现，由于腐蚀过程中发生了两次电解池反应，在杂散电流的作用下，SFRC的力学性能逐渐退化。而粉煤灰和炉渣的添加可以大大提高其抵抗杂散电流侵袭的能力，这使得钢纤维混凝土在电气化铁路中的应用成为可能。