2020 Volume 74 Issue 1 Pages 98-104
Ground granulated blast furnace slag by the single micron particle is expected to be used as repair related material for the purpose of improving initial compressive strength. However, it is said that the use of ground granulated blast furnace slag by the single micron particle increases shrinkage of mortar. Therefore, we made prototypes of ground granulated blast furnace slag by the single micron particle with different particle pore structures, and confirmed the effect of ground granulated blast furnace slag by the single micron particle on drying shrinkage in cement paste. As a result, it was found that dry shrinkage can be improved by using ground granulated blast furnace slag by the single micron particle with a small BET specific surface area even with the same particle size. The reason for this seems to be that the proportion of the pore volume that affects the drying shrinkage has decreased.
