多孔硅粉对新拌自密实混凝土性能的影响

Effects of Porous Silica Powder on the Performances of Self-compacting Fresh Concrete

对分别掺入活化多孔硅粉和硅灰的C60自密实混凝土的含气量、凝结时间、坍落度保持能力和抗压强度等进行了对比试验研究,得出了多孔硅粉对新拌自密实混凝土性能的若干影响规律,并分析了其作用机理。对比分析结果表明,多孔硅粉对新拌自密实混凝土性能的改善作用略优于硅灰,是一种具有高早强性的优质高活性矿物掺合料。

The C60 self-compacting concrete made by respectively adding the porous silica powder or silica fume were compared through the tests, such as slump loss, air content, setting time and compressive strength, and by which the laws and mechanisms of the effect of porous silica powder on the properties of self-compacting concrete were obtained. The results also indicate that the improvement of concrete performances by silica powder will be better than that of by silica fume, and that will demonstrate it is a kind of high activity mineral mixture with high-early-strength.