Abstract
The effect of fine powders (Blaine specific area over 6000cm2/g) from distinct minerals on rheological property of fresh concrete is investigated in this paper. It is found that the vitreous powders play a strong dispersion effect, which increasing the fluidity of concrete and decreasing the plastic viscosity of matrix mortar significantly; Non-vitreous powders cannot achieve a considerable increment of the fluidity of the concrete although it can lower the plastic viscosity. It is inferred from the experimental results that rheological property of the concrete can be highly correlated with the surface characteristic of the powders.
