Silica fumeThe
increase in water demand of concrete containing microsilica will be about 1% for every 1% of cement substituted.
lead to lower slump but more cohesive mix.
make the fresh concrete sticky in nature and hard to handle.
large reduction in bleeding and concrete with microsilica could be handled and transported without segregation.
to plastic shrinkage cracking and, therefore, sheet or mat curing should be considered.
produces more heat of hydration at the initial stage of hydration.
the total generation of heat will be less than that of reference concrete.