如何充分利用粉煤灰,变废为宝,在我国一直是颇受重视的一大课题。现在,粉煤灰虽已被用来制作硅酸盐制品、粉煤灰陶粒、粉煤灰水泥等,但利用率还不很高。我们对掺粉煤灰的减水剂混凝土进行了一些研究,认为在减水剂混凝土中,用粉煤灰替代部分水泥是可行的,这一技术措施既能节省水泥、降低成本,收到一定的经济效益,又能为进一步扩大粉煤灰的利用范围开辟一条新的途径。一、粉煤灰对掺减水荆水泥砂浆流动性的影响 How to make full use of fly ash and turn waste into treasure has always been a major issue in our country. Now, fly ash has been used to make silicate products, fly ash ceramsite, fly ash cement, but the utilization rate is not very high. We have carried out some studies on fly-ash-reduced concrete, and consider that it is feasible to replace part of the cement with fly ash in water-reducing agent concrete. This technical measure can not only save cement, but also reduce costs. The economic benefits can open up a new way to further expand the utilization of fly ash. I. Effect of fly ash on fluidity of cement mortar with dehydrated water