一、前言近年来,一些水泥厂的经验证明,用硬石膏代替石膏作水泥调凝剂,也能达到国家的水泥标准,只是掺量稍有增加。但是,这种掺硬石膏的水泥,在使用中遇到某些混凝土外加剂时会产生异常凝结。这不仅影响到外加剂的推广,而且也影响到水泥的生产和硬石膏的应用。有鉴于此,本文对异常凝结产生的原因及改进措施作了一些探讨。 I. INTRODUCTION In recent years, the experience of some cement plants has proved that the use of anhydrite instead of gypsum as a cement coagulant can also meet the national cement standards, but only slightly increase the dosage. However, this kind of cement mixed with hard gypsum may cause abnormal condensation when it encounters some concrete admixtures during use. This not only affects the promotion of admixtures, but also affects the production of cement and the use of anhydrite. In view of this, this article discusses the cause of abnormal condensation and the improvement measures.