Although modified VSI test with 0.5 increment rate was used in several studies, there is no any accessible document to evaluate visual segregation of SCC.
AASHTO T-351 is the main reference for VSI. Attention: This should be done by reverse slump cone. I've found several publications rated VSI by normal slump test. They definitely didn't follow AASHTO T-351 (Standard Method of Test for Visual Stability Index (VSI) of Self-Consolidating Concrete).
Thank you Sina Dadsetan for your answer. I cannot access that standard from my university. I have ASTM C 1611. My question is related with increment rate of VSI not cone orientation. I think the standards refer the same VSI rating values (0, 1, 2 and 3). But I want to express the values with 0.5 increment rate as 0.0, 0.5, 1.0, 1.5, 2.0, 2.5 and 3.0. I cannot find any materials (article, report etc.) for the rating.
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