**5. Conclusions**

As a new type of eco-friendly material for dam construction, CSG is a low-cost material as it requires a lower amount of cement content and higher fly ash content than traditional ones. This paper briefly introduced the steps of CSG material test. The influence of fly ash content on the strength of CSG material was studied from two perspectives—test work and numerical analysis. The conclusions are as follows:


**Author Contributions:** All authors contributed to the study conception and design. Q.C. performed all experiments and analysis along with data collection and discussion of the results. F.W. (Fang Wan) wrote the manuscript. L.X. edited the manuscript. F.W. (Feng Wu) reviewed the manuscript. All authors have read and agreed to the published version of the manuscript.

**Funding:** The research was supported by Central Plains Science and Technology Innovation Leading Talent Funding Project (194200510008); Major Science and Technology Special Projects in Henan Province (201300311400).

**Data Availability Statement:** The data used to support the findings of this study are included within the article.

**Conflicts of Interest:** We declare that we have no conflict of interest or the authors do not have any possible conflicts of interest.
