What are the effects of the fineness of slag powder on concrete bleeding?

Bleeding is a common problem of concrete mixture.There are many reasons for bleeding, such as coarse cement particles and long setting time;Coarse aggregate, unreasonable gradation, water reducing agent selection is not appropriate;The water-binder ratio in concrete mixture ratio is too high and the sand ratio is too high.As well as construction vibration and other aspects will cause the leakage of concrete mixture.In addition, the addition of slag powder is also a factor.

Whether the concrete mixed with slag powder bleeds or not is related to the fineness of the slag powder. When the slag powder with a small specific surface area is mixed into the concrete, there will be delayed bleeding of the concrete after standing for a period of time. When the slag powder with a large specific surface area is mixed into the concrete, there is no bleeding phenomenon whether it is out of the machine or after a period of time.