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.
2010
SCC; segregation; slump-flow test; T50; viscosity; yield stress
File in questo prodotto:
File Dimensione Formato  
JAI101970_1.pdf

Accesso riservato

: Post-Print (DRAFT o Author’s Accepted Manuscript-AAM)
Dimensione 251.94 kB
Formato Adobe PDF
251.94 kB Adobe PDF   Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/574805
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact