A method for concrete bleeding measurement

Several methods were proposed in the past to measure concrete bleeding, but none of them gives complete satisfaction. The method presented herein consists in sucking water with a pipette, in tracks made on the top surface of concrete just after casting. It takes water evaporation into account. Three tests are carried out simultaneously with three samples of different initial heights. Comparison of the results leads to know whether bleeding is localised (in channels) or not. The average bleeding rate of tests that exhibit no channel is the major result of the test; it is found to be rather repeatable. Overall, this method is believed to be more accurate than the previous ones, since any movement of the sample is avoided during test. Also, a double weighing of water is carried out.