Reinforced concrete bridges are designed to perform satisfactorily for their service life. In early 70’s, premature deterioration of concrete bridge was recognized as a serious problem by highway agencies which has been a major concern to the authorities responsible for their running and maintenance. A significant number of interests have been shown by the highway agencies around the world to predict service life of bridges as bridge is a major part of their road system and unanimously, a road is a key factor of development of country. mIt is very important to identify durability of the existing bridges to calculate the deterioration rate which helps to develop a mathematical model. These models can be used in performance prediction, service life prediction and life cycle costing. Hence a good study of the deterioration and development of mathematical modelling can be a useful tool for the analysis of the deterioration of concrete structures which helps in planning maintenance and management strategies of the deteriorated structures.