for all the rheology researchers, my question is, how relevant is a mini slump cone (smaller than a standard 50 cent rheometer).
currently based on testing, the thickness of slumped material is roughly 3-10mm. diameters are in the range between 100-200 mm. the yield stress (measured with rheometer is in between 5-40Pa).
i am just wondering if it's worth to actually calculate yield stress based on the slump height, since the value is already small and human error will dominate for sure.
open to discussion, especially if you have had experience with mini slump cones.
thanks in advance.
The nice thing about the mini-slump test is that it is simple, rapid, and low cost. If the sample preparation and timing are well controlled, you can obtain reproducible results and you can estimate yield stress reasonably well. You may find this study interesting:
Article Reproducible mini-slump test procedure for measuring the yie...
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