Fly ash can reduce bleeding if the use of fly ash reduces the water requirement of the concrete. However, if water content is not reduced, bleeding of fly ash concrete may becomes larger than that of the concrete with cement only, especially when the mixtures have high water to binder ratio.
The use of fine powder materials like limestone powder reduces bleeding of the concrete mixtures.
When correctly select the type and amount of water reducing admixtures, bleeding can be reduced. On the other hand, overdosing of the chemical admixtures increases bleeding of the concrete. The effect becomes more serious in flow concrete.
It has been reported that higher temperature in the normally practical range increases the bleeding rate but does not affect much the total bleeding volume. However, very low temperature may increase bleeding due to the longer period of plastic state
Fly ash can reduce bleeding if the use of fly ash reduces the water requirement of the concrete. However, if water content is not reduced, bleeding of fly ash concrete may becomes larger than that of the concrete with cement only, especially when the mixtures have high water to binder ratio. The use of fine powder materials like limestone powder reduces bleeding of the concrete mixtures. When correctly select the type and amount of water reducing admixtures, bleeding can be reduced. On the other hand, overdosing of the chemical admixtures increases bleeding of the concrete. The effect becomes more serious in flow concrete. It has been reported that higher temperature in the normally practical range increases the bleeding rate but does not affect much the total bleeding volume. However, very low temperature may increase bleeding due to the longer period of plastic state
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