三峡工程通过掺用 级粉煤灰 ,结合高效减水剂 ,有效地改善了由于采用花岗岩人工集料混凝土用水量偏高的技术难题。并且 ,对提高混凝土后期强度、改善混凝土抗冻、抗渗、干缩等性能起到了很好的作用 The Three Gorges Project through the use of mixed fly ash, combined with superplasticizer, effectively improve the use of artificial granite artificial aggregate concrete high water technical problems. And, to improve the late strength of concrete, concrete to improve antifreeze, impermeability, shrinkage and other properties played a good role