Mechanical Properties of Corroded-Damaged Reinforced Concrete Pile-supporting Wharves
- سال انتشار: 1399
- محل انتشار: ژورنال مهندسی عمران، دوره: 6، شماره: 12
- کد COI اختصاصی: JR_CEJ-6-12_008
- زبان مقاله: انگلیسی
- تعداد مشاهده: 16
نویسندگان
University of San Carlos, Cebu, ۶۰۰۰,, Philippines
University of San Carlos, Cebu, ۶۰۰۰,, Philippines
University of San Carlos, Cebu, ۶۰۰۰,, Philippines
چکیده
Corrosion is one of the significant deteriorations of reinforced concrete structures. It accelerated the performance loss of the structures, leading to a cross-sectional reduction of steel, which affects its mechanical properties, particularly its tensile capacity and ductility. The purpose of this study is to assess the serviceability and safety of corroded-damaged structures, particularly those exposed to aggressive marine environments. A total of ۵۴ pcs of ۱۵۰ mm-diameter and ۳۰۰mm-height of cylindrical specimen were cast. Small-scaled specimens were accelerated to corrosion using impressed current techniques with a constant current density of ۲۰۰ µA/cm۲. Samples were immersed in a simulated environment with a ۵% solution of sodium bicarbonate during corrosion acceleration. Corrosion alters the surface configuration of the steel bar. Pitting corrosions due to chloride aggression causes the residual cross-sectional area of corroded rebars to no longer round and varies considerably along its circumference and length. The reduction of the steel cross-sectional area has a significant impact on the degradation of the strength and durability of reinforcing structures. The residual capacity of the corroded reinforcement decreases with the reduction of the cross-sectional area of the steel reinforcement. The rate of corrosion affects the extent of the remaining service life of a corroded reinforced concrete structure. Doi: ۱۰.۲۸۹۹۱/cej-۲۰۲۰-۰۳۰۹۱۶۲۴ Full Text: PDFCorrosion is one of the significant deteriorations of reinforced concrete structures. It accelerated the performance loss of the structures, leading to a cross-sectional reduction of steel, which affects its mechanical properties, particularly its tensile capacity and ductility. The purpose of this study is to assess the serviceability and safety of corroded-damaged structures, particularly those exposed to aggressive marine environments. A total of ۵۴ pcs of ۱۵۰ mm-diameter and ۳۰۰mm-height of cylindrical specimen were cast. Small-scaled specimens were accelerated to corrosion using impressed current techniques with a constant current density of ۲۰۰ µA/cm۲. Samples were immersed in a simulated environment with a ۵% solution of sodium bicarbonate during corrosion acceleration. Corrosion alters the surface configuration of the steel bar. Pitting corrosions due to chloride aggression causes the residual cross-sectional area of corroded rebars to no longer round and varies considerably along its circumference and length. The reduction of the steel cross-sectional area has a significant impact on the degradation of the strength and durability of reinforcing structures. The residual capacity of the corroded reinforcement decreases with the reduction of the cross-sectional area of the steel reinforcement. The rate of corrosion affects the extent of the remaining service life of a corroded reinforced concrete structure. Doi: ۱۰.۲۸۹۹۱/cej-۲۰۲۰-۰۳۰۹۱۶۲۴ Full Text: PDFکلیدواژه ها
Residual Capacity Load Carrying Capacity Corrosion Level Durability Ductility Tensile Strength Mass Loss Rate Penetration Rate Cross-sectional Area Reduction Crack Width.اطلاعات بیشتر در مورد COI
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