The J-Ring consists of a ring of reinforcing bar that will fit around the base of a standard ASTM C 143 slump cone. The slump cone is filled with concrete and then lifted in the same fashion as if one were conducting the slump flow test, as shown in Fig.2.10. The final spread of the concrete is measured, and the difference between the conventional slump flow value and the J-ring slump flow value is calculated.
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Fig. 2.9 Slump flow testing of SCC. |
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Fig. 2.10 J-Ring testing of SCC. |