Study on the activation of activity of CFB boiler fly ash and utilization in building materials
流化床锅炉飞灰活性激发与建材利用的试验研究

As the activity of CFB fly ash is lower, the routine methods of activation of activity of fly ash are not appropriate for CFB fly ash. The methods of activation of activity of CFB fly ash were studied. The results show that if addition of activator is proper, early strength of cement tensile is increased by 100% and later strength of cement tensile is increased by 60%. The setting time and soundness of samples accord with request. As addition of ash is 40% , the strength of all age surpass the tensile strength of 42.5R cement. As addition of ash is 65% -75% , the building materials of lower strength, for example masonry cement and building mortar, can be produced. The activation mechanism of activity of CFB fly ashes is analyzed by XRD and SEM.