粉煤灰的合理利用,越来越受到国内外的重视,有关科研单位、生产部门做了大量结合实际的应用研究,取得了较好的效果。但是应用于砼制品生产中,特别是三阶段预应力砼管却不多见。笔者曾进行了粉煤灰用于三阶段预应力砼管的应用研究,从应用的本身是十分有意义的,可变 The rational utilization of fly ash has attracted more and more attention at home and abroad. The relevant scientific research units and production departments have done a lot of practical application research and achieved good results. However, in the production of tantalum products, especially the three-stage prestressed tantalum tube is rare. The author has carried out research on the application of fly ash for three-stage prestressed concrete pipe, and it is very significant from the application itself.