The Bleeding Of Potland Cement Paste, Mortar, and Concrete
T. C. Powers
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Bleeding is identified as the result of subsidence of temporarily suspended solids. It occurs in two stages: a period of constant rate followed by one of diminishing rate. The rate during the constant period follows a general law derived from Poisseuilie’s law of capillary flow. The water content of the mix and the - surface area of the solids are the major controlling factors, but with these constant, different materials show Individuality, due to unidentified characteristics. A simple law governing bleeding capacity (subsidence per unit original height) is developed. The ideal mix from the standpoint of bleeding is defined.