Abstract: This paper gives a brief account of the advantages and blending methods of fly ash concrete. Then it points out and analyses the mistakes in the escessive replacement method based on the national standards of GBJ146-90. At last, the paper proposes some remedial ideas on the above-mentioned method.

Key words: fly ash, standard concrete, excessive replacement method, true density, apparent density

摘要： 笔者在文中介绍了粉煤灰砼的优越性及粉煤灰在砼中的掺配方法,指出了国家标准《粉煤灰砼应用技术 规范》(GBJ146-90)以及文献[1]中提出的粉煤灰砼超量取代设计方法中的不合理之处,并加以分析说明,提出 了修改方案,为今后《规范》的修改提供了依据.

关键词: 粉煤灰, 基准砼, 超量取代法, 真密度, 表观密度