本刊讯磨细粉煤灰是将符合一定化学成分的原状干粉煤灰,经磨细加工成一定细度要求的粉状外掺料。上海市建委组织建筑科学研究所等单位积极推广这种外掺料用于混凝土和砂浆,这是解决当前水泥缺口的一项有效措施。并且还改善了混凝土拌合科的和易性,减小泌水和离析, This paper reports that finely ground fly ash is a powdered fly ash that will meet certain chemical composition and is ground to a certain degree of fineness. The Shanghai Construction Committee organized the Institute of Building Science and other units to actively promote the use of such admixtures for concrete and mortar, which is an effective measure to solve the current cement gap. It also improves the workability of the concrete mixing section and reduces bleeding and segregation.