Chloride Content of Reinforced Concrete Structure in Marine Environment Case Study: Hua Hin and Pran Buri of Prajuap khiri khan.

Abstract

This research aims to study the chloride penetration in reinforced concrete bridge structure at the marine environment area. The 10 bridges of older 10 years of reinforced concrete bridge structure and the distance in range of 10 kilometers away from the coast at Hua Hin and Pranburi of Prajuap khiri khan are used to consider. The majority damage of bridge structures cause by the corrosion of reinforcing steel from chloride. The samples are collected as powdered concrete, and the 3 positions of bridge structures including rail bridge, beam and pier tidal are used to evaluate. At those positions, the powdered concretes in the range of depth 0 to 10 cm from concrete surface are collected to test the chloride content. The results found that the distance from the coast, the chloride content in the water under the bridge and position of structures have strong effect on chloride content in the concrete. The results from this investigation can be further performed in order to develop the model for prediction the service life, and to increase efficient designed of reinforced concrete structure in marine environment.