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M.R. Garmsiri, H. Haji Amin Shirazi, M.R. Yarahmadi
An analysis of the influence of cylinder dimension ratio and lifting velocity on the slump test results
Appl. Rheol. 25:2 (2015) 23416 (8 pages)
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As a fundamental rheological property, shear yield stress is used to assess the flowability of suspensions. Slump test is a
cheap and quick experiment which is commonly used to estimate shear yield stress on-site. It has been generally believed
that, cylinder height to diameter ratio and lifting velocity has no effect on the slump test results. In this work, the sensitivity
of the slump test to the height to diameter ratio and lifting velocity of cylinder was investigated. Projections on the top surface
of suspension column after the slump test were also analyzed. Results indicated that, the effect of cylinder height to
diameter ratio is negligible in the low range of shear yield stress, while it is remarkable in the high range. It was deduced that,
using a cylinder with dimension ratio in the range of 0.83 to 1.15 is more reliable. Furthermore, it is shown that the lifting
velocity of cylinder has a significant effect on the results. A high lifting velocity could introduce a great error in estimation
particularly in a large height to diameter ratio.
► Cite this publication as follows:
Garmsiri M, HajiAminShirazi H, Yarahmadi M: An analysis of the influence of cylinder dimension ratio and lifting velocity on the slump test results, Appl. Rheol. 25 (2015) 23416.
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