ABSTRACT
ABSTRACT: Most of the infrastructures which were constructed in the 20th century such as bridges, dams and tunnels, are facing crisis life-span attainment due to their structural and functional degradation. Especially, this tendency is strong to the infrastructures which were built from concrete and steel material. It can be considered as an engineer’s dedicated task and in the same time also as a social request to continue performing proper maintenance and finding way to extend the life span of such deteriorated infrastructures.
