Method of test bleeding of concrete

Method of Test for Bleeding of Concrete

A cylindrical container of approximately 0.01meter cube capacity, having an inside diameter of 250 mm and height 280 mm used. A tamping bar similar to the one used for slump test is used. A pipette for drawing off free water from the surface, a graduated jar of 100 centimeter cube capacity is required for test.

A sample of freshly mixed concrete is obtained. The concrete is filled in 50 millimeter layer for a depth of 250±3 millimeter (5 layers) and each layer is tamped by giving stokes, and the top surface is made smooth by toweling.

The test specimen is weighed and the weight of the concrete is noted. Knowing the total water content in 1 meter cube of concrete quantity of water in the cylindrical container is also calculated.

The cylindrical container is kept in a level surface free from vibration at a temperature of 27⁰C ± 2⁰C; it is covered with a lid. Water accumulated at the top is dawn by means of pipette at 10 minutes interval for the first 40 minutes and at 30 minutes interval subsequently till bleeding ceases. To facilitate collection of bleeding water the container may be slightly titled. All the bleeding water collected in a jar