粉煤灰对碱激发高炉矿渣性能的影响

摘要

Influence of fly ash dosage on the slump,setting time,compressive strength,thermal stability and mi-crostructure of alkali activated blast furnace slag were researched.Results showed that replacement of blast furnace slag by fly ash could increase the slump of alkali activated blast furnace slag and setting time.However,the com-pressive strength and thermal stability of alkali activated blast furnace slag decreased due to the addition of fly ash.On the other hand,the lower reactivity of fly ash increased the setting time of alkali activated slag but decreased its compressive strength and thermal stability,while the porosity increased.%研究了掺加粉煤灰对碱激发高炉矿渣流动性、硬化时间、试件抗压强度及热稳定性与微观结构的影响.结果表明:①随着粉煤灰掺量的增加,料浆的塌落度上升,硬化时间延长.②粉煤灰的掺量越大,试块的抗压强度越低.③粉煤灰较低的反应活性,是造成掺粉煤灰的碱激发高炉矿渣试块硬化时间延长、抗压强度和热稳定性下降、孔隙率上升的原因.