Estimating Service Life of Reinforced Concrete Bridges in Mekong Delta Region Under Chloride Corrosion Risk – A Case Study of Ganh Hao Bridge Project

Mekong delta region is located in the South of Vietnam where is considered as the most vulnerable area due to climate change. During the next decades, sea level in this region is estimated to rise dramatically with three main scenarios including RCP2.6, RCP4.5 and RCP8.5. This change will facilitate saltwater intrusion which greatly impacts reinforced concrete structures. As chloride concentration increases, it poses a high potential risk of corrosion causing the degradation of reinforced concrete structures, especially bridge works. To bring up suitable solutions dealing with chloride intrusion corrosion, it is necessary to analyze the influence of this risk on bridge constructions. This article will estimate service life of reinforced concrete bridges with a case study of the Ganh Hao project located in Delta Mekong region. The results of this study will clarify the influence of chloride corrosion risk, comparing serviced life of Ganh hao bridge with consideration of three scenarios of sea level rising.