Rheological method to evaluate structural buildup in self-consolidating concrete cement pastes

Raissa P. Ferron*, Amedeo Gregori, Zhihui Sun, Surendra P Shah

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

Abstract

Much research has focused on determining the rheological properties of cementitious materials, but limited information can be found on the influence of thixotropy in affecting the flow properties of these materials. A protocol consisting of hysteresis loops and energy methods, was developed to quantify the degree of structural rebuilding in cement pastes. This protocol takes into account the stiffening due to thixotropic rebuilding and irreversible structural changes by focusing on the rate in which the cement paste is able to regain its internal structure after shearing. The protocol was used to evaluate the rebuilding potential of 23 cement paste mixtures of various binder type and fluidity level. Results show that structural build up can be controlled through selection of proper powder type, high-range water-reducing admixture, and water-to-binder ratio (w/b).

Original languageEnglish (US)
Pages (from-to)242-250
Number of pages9
JournalACI Materials Journal
Volume104
Issue number3
StatePublished - May 1 2007

Keywords

  • Rheology
  • Self-consolidating concrete
  • Thixotropy

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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