CONCLUSIONS

Thirteen concrete mixes were prepared with a wide range of viscosity. All the mixes were targeted to the same slump and slump spread using a variable dosage of HRWR. These mixes showed a wide range of flow properties when measured using other devices. The following conclusion can be drawn:

• The slump flow is not enough to determine whether a flowable concrete is SCC.
  
• The value measured with the IBB and the BTRHEOM correlate relatively well on viscosity but not on yield stress on the concrete mixtures tested. Further measurements are needed to determine if the correlation holds with other aggregates and cementitious/filler materials.
  
• Based on the data presented, the plastic viscosity and the yield stress do not correlate with the V-funnel or the U-flow test.
  
• Various types of SCC can be defined by a range of yield stress and plastic viscosities as determined graphically with the "workability box" defined by Beaupré. The slump flow is not enough to determine whether a flowable concrete is SCC.