Relationship between bleeding, coarse aggregate, and specimen height of concrete

TLDR: In this article, the authors investigated the effect of the amount of bleeding water on the strength of the upper area of a concrete sample and concluded that the strength is not only affected directly by the bleeding water but other areas may be affected as well.

Abstract: As the height of concrete increases, the amount of bleeding water increases, This increse in bleeding water is directly proportional to height when the concrete is lower but becomes nonlinear in comparativley higher examples Obviously, the strength of the upper area of the specimen is affected directly by the bleeding water but the other areas may be affected as well In general, it is accepted that the strength of concrete is complicated by the consolidation of cement paste and aggregate Considering these facts, bleeding tests were carried out on cement paste, mortar, and concrete of various heights, and respective formulas were concluded to calcualte the amount of bleeding water Special attention was given to concrete specimens; strength tests were done at each height and compared to the amount of bleeding water