Effect of mineral admixtures on formwork pressure of self-consolidating concrete

Jae Hong Kim, Mark Beacraft, Surendra P Shah

Research output: Contribution to journalArticle

49 Scopus citations

Abstract

Owing to enhanced filling ability, self-consolidating concrete offers accelerated casting and superior quality control during construction. However, its high fluidity and high placement rate increase the lateral pressure on the formwork, necessitating an extensive supporting system to retain fresh mixtures in a desired shape. Current recommendations of formwork design for self-consolidating concrete adopt the concept of hydrostatic pressure, even though the measured pressure could be less than the recommended level. This study shows that mineral admixtures such as processed clays can appreciably lessen the formwork lateral pressure. In addition, the correlation between the formwork pressure response and the loss of slump flow is derived, providing an approximate method to estimate the reduction in formwork pressure.

Original languageEnglish (US)
Pages (from-to)665-671
Number of pages7
JournalCement and Concrete Composites
Volume32
Issue number9
DOIs
StatePublished - Oct 1 2010

Keywords

  • Attapulgite
  • Formwork pressure
  • Kaolin
  • SCC
  • Silica fume
  • Slump flow

ASJC Scopus subject areas

  • Building and Construction
  • Materials Science(all)

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