大坝混凝土除少数特殊部位外，大都强度不高，但其它性能要求较高。为适应三峡大坝混凝土的需要，我们提出了既高掺粉煤灰，又维持较高的水泥熟料含量，各种性能都较好的胶凝材料配比方案，通过系统的试验研究，论证了它的可靠性，同时对粉煤灰在水泥中的最大允许掺量和粉煤灰的水化作了探讨。 In addition to a few special parts of concrete dam, most of the strength is not high, but other performance requirements are higher. In order to meet the needs of the concrete of the Three Gorges Dam, we put forward a cementitious material proportioning scheme that not only combines high fly ash with high content of cement clinker but also has good performance in all aspects. Through the systematic experimental research and demonstration Its reliability, at the same time, the maximum allowable fly ash in cement and fly ash hydration were discussed.