In order to improve the utilization rate of Bayer process red mud and added value,it compared different physical and chemi-cal properties of red mud A and red mud B of Bayer process red mud and cement composite mortar fluidity,mechanical strength,and the influence law of microstructure.The research results show that the optimum content of red mud A is 10%,the optimum content of red mud B is 20%,the preparation of Bayer process red mud-mechanical properties of composite cement mortar can be reached P·O 42.5 cement standard strength requirements.In addition,compared with red mud A,the mixed red mud B gives composite mortar has higher mechanical properties,this is mainly because on the one hand,the particle size is relatively small,red mud B help filling slurry pores,improve the den-sity of cement stone,on the other hand,red mud B contains more Na2O、K2O such as free alkali,alkaline excitation effect is more apparent,can accelerate active mineral slurry of hydration.
关键词
拜耳法赤泥/复合砂浆/工作性能/力学性能/微结构
Key words
Bayer red mud/alkali content/work performance/mechanical properties/micostructure
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