high-performance concrete;  water-to-adhesive ratio;  fly ash;  sand rate;  Intensity

Aiming at the remarkable characteristics of fly ash and its wide application in engineering, the time engineering fully investigates, analyzes the material composition and designs the mix ratio. The water-to-adhesive ratio, fly ash content and sand rate were used as the changing parameters. The orthogonal test method was used to conduct experimental research on high content fly ash concrete, and the influencing factors were analyzed in depth. The results show that . The water-to-adhesive ratio and fly ash substitution rate are the main factors affecting the performance of concrete, and the sand rate has a great influence on the fluidity and strength of concrete. At the same time, the correlation between the influencing factors and the concrete properties under the condition of high fly ash content and its variation law are obtained, which can be used as a reference for theoretical research and engineering practice.