Title:
Relation Between Bleeding, Coarse Aggregate, and Specimen Height of Concrete
Author(s):
Masayuki Hoshino
Publication:
Materials Journal
Volume:
86
Issue:
2
Appears on pages(s):
185-190
Keywords:
bleeding (concrete); cement pastes; coarse aggregates; compacting; compressive strength; concretes; crushed stone; gravel; mortars (material); specimens; water; Materials Research
DOI:
10.14359/2252
Date:
3/1/1989
Abstract:
As the height of concrete increases, the amount of bleeding water increases. This increase in bleeding water is directly proportional to height when the concrete is lower, but becomes nonlinear in comparatively 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, the author carried out bleeding tests on cement paste, mortar, and concrete of various heights, and concluded respective formulas to calculate 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.