本文主要介绍采用 S_3型超早强减水剂和外掺原状粉煤灰,在节省水泥15%的前提下,对混凝土强度和耐久性的影响.指出掺加适量粉煤灰时,只要减水剂的品种选择合理,混凝土的主要性能与普通混凝土的性能无明显差异,进一步证明双掺技术是利用粉煤灰、节省水泥的一个有效途径. This article mainly introduces the effect of using S_3 super early water reducer and fly ash mixed with raw fly ash on the premise of saving 15% of cement, and the effect on the strength and durability of concrete. The choice of agents is reasonable, and there is no obvious difference between the main performance of concrete and that of ordinary concrete, which further proves that double-blending technology is an effective way to use fly ash and save cement.