Evaluation of self-healing capability of FRCC using PVA as reinforcing fiber and admixture

Tomoya Nishiwaki, Makoto Yamada, Takatsune Kikuta, Hirozo Mihashi

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

Experimental studies were carried out to evaluate the self-healing capability of fiber reinforced cementitious composite (FRCC), to enhance its durability. For this purpose, polyvinyl alcohol (PVA) was used not only as a reinforcing fiber but also as an extra admixture. It was confirmed in a recent study that PVA fiber that had the high polarity of a synthetic composite could enhance self-healing capability of FRCC. In this study, FRCC specimens were subjected to uniaxial tension test in order to generate a crack in them, and the cracked specimens were then immersed in water. In order to evaluate their self-healing capability, water permeability test and microscopic observation were then carried out. It was found that the addition of an extra dose of PVA as an admixture could improve ductility of a specimen, as measured in the tension test, and also increase the complexity of the crack flanks. It was also found that it could enhance the chemical precipitation on the cement matrix of the crack flanks, so the coefficient of permeability could be restored to the point it was previous to the crack generation. Thus, an admixture of PVA might be expected to enhance the self-healing capability of cracks.

Original languageEnglish
Article numbere279
JournalSustainable Construction Materials and Technologies
Volume2013-August
Publication statusPublished - 2013
Event3rd International Conference on Sustainable Construction Materials and Technologies, SCMT 2013 - Kyoto, Japan
Duration: 2013 Aug 182013 Aug 21

Keywords

  • Calcite precipitation
  • FRCC
  • PVA
  • Self-healing
  • Water permeability

ASJC Scopus subject areas

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

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