Carbonation and Mechanical property of the Concrete Core Samples from a concrete dam after long-term operation

To investigate the ageing characteristics of dam concrete, concrete core samples were obtained from an existing dam. The compressive strength and carbonation depth were determined. The relationship between compressive strength, carbonation depth and operation time were analyzed. The results show that the compressive strength of dam concrete increases with operational time, the increasing rate of compressive strength was gradually decreased, and the compressive strength gradually increases with depth carbonation growth. There was a certain correlation between compressive strength, operational time and depth carbonation. The research results will provide a reference for the safety evaluation of hydraulic concrete structures in service.