The effect of measuring procedure on the apparent rheological properties of self-compacting concrete

Mette Rica Geiker, M. Bradl, L.N. Thrane, D.H. Bager, O. Wallevik

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Torque versus time during testing of the rheological properties of fresh concrete has been investigated. The testing was performed in a BML viscometer and on a self-compacting concrete (w/c = 0.45, 70% rapid hardening Portland cement, 3% silica fume, 27% fly ash, third generation superplasticizer). The relaxation period needed to obtain steady-state flow may affect the rheological properties estimated and should be taken into account in the selection of measuring procedures. Nonsteady state is likely to cause an overestimation of the plastic viscosity and an underestimation of the yield value. Furthermore, lack of steady state may explain the apparent shear-thickening behaviour of self-compacting concrete reported elsewhere. (C) 2002 Elsevier Science Ltd. All rights reserved.
Original languageEnglish
JournalCement and Concrete Research
Volume32
Issue number11
Pages (from-to)1791-1795
ISSN0008-8846
DOIs
Publication statusPublished - 2002

Keywords

  • self-compacting concrete
  • rheological properties
  • measuring procedure

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