Abstract: The research achievements and innovations in concrete materials for water conservancy and hydropower projects in the past seven decades made by the Material and Structure Department of Changjiang (Yangtze) River Scientific Research Institute (CRSRI) were summarized in this paper. The department has been promoting hydraulic concrete raw materials towards a diversified, functionalized, and geo-oriented development with low carbon, and has been leading the transformation of dam concrete performance design from being strength-dominated to durability-oriented. The team of hydraulic construction materials in CRSRI has provided advanced design of mix ratio of hydraulic concrete for many large and medium-sized water conservancy and hydropower projects in China and abroad, solved many engineering problems in crack control, durability improvement and high performance of hydraulic concrete, and accumulated rich achievements and experiences to enhance hydraulic concrete technology. In future, we will continue to focus on the demand for new materials, new technologies, and new techniques in the development of new energy, and help achieve the national strategy of carbon peaking and carbon neutrality.

Key words: hydraulic concrete, raw materials, mix ratio design, crack resistance, durability