Reason, Assessment And Quality Control On Durability Of Concrete Structures In Onshore

Concrete structures are widely used in China. The consideration on durability of coastal concrete structures has become a most urgent problem in present. Many fundamental research problems in this field remain to be do. This paper presents an analysis method of mechanical behavior of aged concrete structures on elastic theory,and analyses the main causes of load bearing performance of concrete structures. The paper also illustrates some studies where structures exposed to the marine environment showed early deterioration and analyses the main causes of structural concrete deterioration,including concrete carbonization,corrosion mechanisms of concrete,and mechanisms of steel corrosion due to the penetration of chloride ions into the concrete. It shows that corrosion of the reinforcements is the main cause of structural concrete deterioration.At the end reliability of concrete structures is calculated to durability design,and quality prevention mention is presented to enhance durabilityof coastal concrete structures.