Mechanical Properties of Corroded-Damaged Reinforced Concrete Pile-supporting Wharves

Cecielle N. Dacuan, Virgilio Abellana, Hana Astrid Canseco


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 54 pcs of 150 mm-diameter and 300mm-height of cylindrical specimen were cast. Small-scaled specimens were accelerated to corrosion using impressed current techniques with a constant current density of 200 µA/cm2. Samples were immersed in a simulated environment with a 5% 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: 10.28991/cej-2020-03091624

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Residual Capacity; Load Carrying Capacity; Corrosion Level; Durability; Ductility; Tensile Strength; Mass Loss Rate; Penetration Rate; Cross-sectional Area Reduction; Crack Width.


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DOI: 10.28991/cej-2020-03091624


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