摘要
从充分发挥煤矸石潜在活性的观点出发,在热活化的基础上采用化学激发的方法处理煤矸石,以达到用较少量的优质熟料辅以高度激发的活性废渣制备大量高性能水泥的目的。试验尝试采用CaO,Na2SO4和废渣磷石膏作复合激发剂,生产少熟料煤矸石水泥,通过对其强度和水化体系进行研究,找出三种激发剂的最佳配合比。在试验所采用的几种配比中,以5%磷石膏+3%CaO+2%Na2SO4的配比最好,煤矸石的掺入量可以达到50%,水泥净浆小试体28d强度可达48.1MPa。该水泥水化产物除了有C-S-H凝胶和钙矾石外,还生成网络状结构的无定形硅铝凝胶Na6[AlSiO4]6·4H2O。
Based on the standpoint of utilizing the potential activity of coal gangue sufficiently, chemical activation was applied after heat activation to reach the purpose of producing high performace cement with little clinker and well excitated coal gangue. Using CaO, Na2SO4 and phosphorus gypsum as composite activator, the trial production of low-clinker coal gangue cement was processed, and by comparsion of strength and hydration phases of the cement, the best proportion of the three activators was found 5% phosphorus gypsum＋3%CaO＋2%Na2SO4, then the coal gangue adding rate could reach 50%, and 28 d strength of the cement mortar could reach 48.1 MPa, and there are not only C-S-H gel and Aft but also amorphous aluminosilicate gel with network structure among the hydrated products of the compound cement.
出处
《水泥工程》
CAS
2011年第1期9-12,共4页
Cement Engineering
关键词
煤矸石
碱激发
水化体系
coal gangue
alkali activation
hydration system
