Using fly ash, clay, and fibers for simultaneous improvement of concrete green strength and consolidatability for slip-form pavement

Thomas Voigt*, Jean Juste Mbele, Kejin Wang, Surendra P Shah

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

This paper presents a procedure to find the optimal balance between the consolidation properties and shape stability of fresh concrete mixtures to achieve a self-consolidating concrete applicable for the slip-form paving process. The investigations started with a conventional slip-form paving concrete mixture. Various types and amounts of supplementary cementitious materials (fly ash), admixtures (water reducers), and additives (clays, magnesium oxide, and fibers) were then gradually applied to modify flowability and maintain sufficient green strength. This approach has led to a successful mix design-the concrete mixture can be consolidated without internal or external vibration and also maintains its slab shape after the slip-form paving process. In the present paper, the step-by-step mix design approach is described, and the effects of admixtures and additives on concrete flowability and shape stability are explained.

Original languageEnglish (US)
Article number001002QMT
Pages (from-to)196-206
Number of pages11
JournalJournal of Materials in Civil Engineering
Volume22
Issue number2
DOIs
StatePublished - Feb 1 2010

Keywords

  • Admixtures
  • Clays
  • Compaction
  • Concrete pavements
  • Fly ash

ASJC Scopus subject areas

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

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