外文资料翻译--温度和相对湿度对沿印度海岸的钢筋混凝土构件腐蚀起始时间的影响(编辑修改稿)

外文资料翻译--温度和相对湿度对沿印度海岸的钢筋混凝土构件腐蚀起始时间的影响(编辑修改稿)内容摘要：

365 considers fully saturated condition of concrete and thus underestimates the corrosion initiation time of a reinforced concrete member. The deterministic approach uses mean values of the parameters and provides a 50% probability of corrosion initiation but the probabilistic approach provides expected time of first corrosion for chosen risk of corrosion and also gives sensitivity of parameters to probability of corrosion. Corrosion initiation time in ascending order is found at Colaba, Kanyakumari, Santacruz, Chennai and Vishakhapatnam. Corrosion initiation time is useful for owner, designer, or to an organization to take decision in time of priority of repairs, repair strategy, corrosion protection in order to optimize maintenance planning and budgeting. Planned maintenance at the optimum time is the safest and most cost effective approach. Keywords: Corrosion。 partially saturated concrete。 chloride ingress。 diffusion。 temperature。 relative humidity。 probabilistic。 sensitivity. 1. Introduction Reinforced concrete structures are most widely used across the world. Reinforced concrete (RC) structures deteriorate with time in a corrosive environment affecting aesthetic, functional and structural aspects in service. The rate of deterioration depends on factors such 5 as planning, design, construction, operation/use, and maintenance. Degradation of concrete is related to its durability aspect and to its corrosion of reinforcing steel. The corrosion of the steel reinforcement leads to concrete fracture through cracking, delamination and spalling of concrete cover, reduction of concrete and reinforcement cross sections, loss of bond between the steel reinforcement and concrete, and reduction in strength and ductility, which leads to irrecoverable losses and collapse of structures. Hence, the safety and serviceability of concrete structures in service needs to be considered. Carbonation, sulfate and chloride attack, and steel corrosion may cause the degradation of reinforced concrete members/buildings. The chlorideinduced (peration of chloride ions in to concrete) corrosion of the steel reinforcement is identified as one of the main cause of deterioration of different concrete structures (. bridges, offshore structures and parking garages). The sources of chlorides are the seawater, deicing salts, and air in marine environment. Reinforcement corrosion starts (in presence of moisture and oxygen) once the concentration of chlo。