Two key characteristics of self-consolidating concrete are flowability and segregation resistance. Quality control of flowability is typically predicted by the final diameter of the slump-flow test. In this paper, experimental results demonstrate that dynamic segregation of a self-consolidating concrete mix can also be predicted from the slump-flow test by measuring the time it takes for the flow to reach its final diameter. For a constant final diameter and aggregate content, increasing the time to final diameter led to a more stable mix. Two sets of slump-flow and segregation data were obtained for flow diameters of 65 and 70 cm, both with constant water-to-binder and aggregate-to-binder ratios. Dynamic segregation was determined by comparing the aggregate content in three regions: Within the diameter of the slump cone, between the diameter of the cone and a diameter of 50 cm, and between a diameter of 50 cm and the final diameter. In addition, the rapid penetration test was used to compare dynamic and static segregation characteristics.
Predicting dynamic segregation resistance of self-consolidating concrete from the slump-flow test
FERRARA, LIBERATO;
2010-01-01
Abstract
Two key characteristics of self-consolidating concrete are flowability and segregation resistance. Quality control of flowability is typically predicted by the final diameter of the slump-flow test. In this paper, experimental results demonstrate that dynamic segregation of a self-consolidating concrete mix can also be predicted from the slump-flow test by measuring the time it takes for the flow to reach its final diameter. For a constant final diameter and aggregate content, increasing the time to final diameter led to a more stable mix. Two sets of slump-flow and segregation data were obtained for flow diameters of 65 and 70 cm, both with constant water-to-binder and aggregate-to-binder ratios. Dynamic segregation was determined by comparing the aggregate content in three regions: Within the diameter of the slump cone, between the diameter of the cone and a diameter of 50 cm, and between a diameter of 50 cm and the final diameter. In addition, the rapid penetration test was used to compare dynamic and static segregation characteristics.File | Dimensione | Formato | |
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