粉煤灰掺量对相同浆体体积比砂浆性能的影响

The influence of mortar performance with FA based on the equal ratio of grout volume

为了研究粉煤灰掺量对砂浆性能的影响,采用相同浆体体积比,分别以0%、10%、20%和30%的粉煤灰掺量配制砂浆,进行强度和碳化深度对比试验。结果表明,当水胶比一定时,随粉煤灰掺量的增加,砂浆的流动性不会明显降低;早期掺粉煤灰的水泥砂浆的强度会随着粉煤灰掺量的增加而降低,但其后期强度随着龄期的增长会逐渐提高并超过未掺粉煤灰的砂浆的强度;随着粉煤灰掺入量的增加,水胶比的增大以及暴露时间的增长,砂浆的碳化深度呈逐渐增加的趋势。

The experiment of strength and carbonation depth were compared respectively with the ratio of 0%、10%、20%、30% of fly ash（FA） and the same ratio of grout volume,to research the influence of the content of FA to the mortar.The result shows that with the certain water-binder ratio（W/C）,the fluidity of cement mortar does not significantly reduce when FA increases;the strength of mortar with FA decreases with the increase of the FA in the early stage while it catches up with gradually and surpass that of mortar without FA;the carbonation depth of cement mortar increases with the increase of the amount of FA,and exposure time.