Silica sol mixture comprising at least two silica sols; one having a broad particle size distribution and the other with a narrow particle size distribution for concrete

摘要

Described is a silica sol mixture comprising a first silica sol having a broad particle size distribution, the relative standard deviation being at least about 30% by numbers, and a second silica sol having a narrow particle size distribution having a relative standard deviation lower than about 15% by numbers. A method for preparing a silica sol mixture and use thereof is also described. Further described is a concrete composition comprising a silica sol mixture and a method for preparing such composition.