The effect of ultrafine admixture on the rheological
#0183;#32;The viscosity and the yield stress can be decreased by a respective addition of 10% ultrafine LS, SF, FA or a single addition of 35% ultrafine slag. The acting effect is ranged as: slaggt;LSgt;SF gt;FA. The viscosity and the yield stress of cement paste can be raised significantly by a single addition of 10% ultrafine AG.