Gypsum powder: the development of natural anhydrite in the 1970s-1980s, shaodun, Nanjing and other large anhydrite mines established and realized one after another "reform and opening up", various factories and mines, scientific research institutions and colleges and universities of theory and Application Research of natural anhydrite pushed to a climax, which can not only find the setting of anhydrite cement, but also enhance, It can also improve the fluidity of cement paste and the density of hardened body, and has achieved good results in the preparation of sulphoaluminate cement, slag cement, oil well cement, low alkali cement and various Portland cement with fast hardening.

　　1985年，国家正式颁布了《水泥用石膏和硬石膏标准》(GB 5483 85)，硬石膏的应用进入了一个新阶段。同时对硬石膏的水化硬化、活化机理以及硬石膏水泥的生产和应用进行了研究。20世纪90年代以来，硬石膏的活化技术有了新的进展，硬石膏的水化硬化速度、耐水性和强度都有了很大的提高。现在除了使用硬石膏作为水泥混凝剂和生产各种水泥外，硬石膏还用于生产膨胀剂、地坪抹灰、石膏抹灰、模型抹灰、人造大理石、硬石膏砌块、硬石膏陶瓷和各种板材等建筑材料。由于我国硬石膏储量丰富，具有加工工艺简单、节约能源、也具有利用废渣、保护环境等优点，在未来必将得到迅速的发展。

　　In 1985, the state officially promulgated the standard of gypsum and anhydrite for cement (GB 548385). The application of anhydrite has entered a new stage. At the same time, the hydration hardening and activation mechanism of anhydrite and the production and application of anhydrite cement were studied. Since the 1990s, the activation technology of anhydrite has made new progress, and the hydration hardening speed, water resistance and strength of anhydrite have been greatly improved. Now in addition to using anhydrite as cement coagulant and producing various cements, anhydrite is also used to produce building materials such as expansion agent, floor plastering, gypsum plastering, model plastering, artificial marble, anhydrite block, anhydrite ceramics and various boards. Due to the abundant reserves of anhydrite in our country, it has the advantages of simple processing technology, energy saving, waste residue utilization and environmental protection, and it will be developed rapidly in the future.

　　以上是济南石膏粉生产厂家小编为大家介绍的相关内容，想要了解更多内容，欢迎访问网站：https://www.jnfhjc.com

　　The above is the relevant content introduced by Jinan gypsum powder manufacturer. If you want to know more, please visit the website: https://www.jnfhjc.com