Abstract: Quality of artificial aggregate is the foundation of concrete quality, which is of great significance to the safety and stability of concrete dams during long-term operation. In line with the characteristics of artificial aggregate production system for the dam concrete of Wudongde Project, we summarized the whole process of aggregate production from raw material mining to aggregate processing, and put forward measures of optimizing the production techniques of coarse and fine aggregates. Results manifested that the particle size of coarse aggregate is effectively controlled, and the output and quality of fine aggregate (fineness modulus, stone powder content and particle content) are improved, hence enhancing the quality of dam concrete production for Wudongde Project. The quality and safety of the dam's entire life cycle have also been guaranteed.

Key words: concrete, artificial aggregate, artificial aggregate production system, quality improving measures, Wudongde ultra-high arch dam