Combined effect of expansive and shrinkage-reducing admixtures on the properties of ultra high performance fiber-reinforced concrete

Doo Yeol Yoo, Jung Jun Park, Sung Wook Kim, Young Soo Yoon

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

In order to investigate the combined effect of expansive and shrinkage-reducing admixtures on shrinkage and mechanical properties of ultra high performance fiber-reinforced concrete, a series of experiments including three types of shrinkage tests, compressive and flexural tests, and penetration-resistance test were performed. Test results showed that about 51-53% of free shrinkage and 35-49% of restrained steel strains were reduced by adding 1% shrinkage-reducing admixture along with 7.5% expansive admixture with slight change of strength. Elastic stress, residual interface pressure and degree of restraint from ring specimens were also significantly reduced by using expansive and shrinkage-reducing admixtures. Although the elastic stress of the ring specimen without expansive and shrinkage-reducing admixtures was higher than the tensile strength, no shrinkage crack was observed for all test specimens due to the relaxation effect.

Original languageEnglish
Pages (from-to)1981-1991
Number of pages11
JournalJournal of Composite Materials
Volume48
Issue number16
DOIs
Publication statusPublished - 2014 Jul

Keywords

  • Ultra high performance fiber-reinforced concrete
  • degree of restraint
  • elastic stress
  • expansive admixture
  • shrinkage
  • shrinkage-reducing admixture
  • theoretical shrinkage cracking

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Materials Chemistry

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