Friday, March 10, 2017

Bleeding

-Some water from the concrete comes out to surface being of the lowest Specific gravity among all the ingredients
-Usually observed in highly wet mixes, badly proportioned mixes, and improperly mixed concrete
-Water Comes up & accumulates at surface
-Sometimes cement also comes to the surface

-The aggregates goes down
-Formation of cement paste at the surface is Laitance
-Bleeding won't be harmful if rate of evaporation of water from surface is equal to the rate of bleeding
-Removal of water after it had played its role in providing workability from body of concrete by way of bleeding will do good to the concrete


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