The negative effect of silica fume on workability of mortars can
be compensated by using of limestone and silica fume together.
In limestone–silica fume mortars, to some extent, silica fume
compensated the negative effect of limestone on compressive
strength of mortars at later ages.
Simultaneous using of limestone and silica fume was significantly
increased sulfate resistance of mortars.
Sulfate expansions of all mortar mixtures in magnesium sulfate
solution were higher than in sodium sulfate solutions.
The optimum limestone–silica fume mortars for fluidity,
compressive strength and sulfate resistance were obtained as
35L5S, 5L5S and 35L15S, respectively