Ecological and mechanical properties of ultra high performance – Fiber reinforced cementitious composites containing high volume fly ash

Tomoya Nishiwaki, Keita Suzuki, Sukmin Kwon, Go Igarashi, Alessandro P. Fantilli

Research output: Contribution to journalArticle

Abstract

Ultra High Performance – Fiber Reinforced Cementitious Composites (UHP-FRCC) has successfully developed in the last decades. They show excellent mechanical properties and durability, due to the highly dense microstructure produced by extremely low water/binder ratio and large amounts of cement. Thus, replacing part of the cement content with High Volume Fly Ash (HVFA) could be an effective way to improve also the ecological properties of UHP-FRCC. Indeed, most of the carbon footprint of cement-based composites is caused by the CO2 production of cement manufacturing. On the other hand, HVFA tends to reduce the mechanical properties of UHP-FRCC, especially at the early age. To evaluate the effect of some cement replacement (20, 50 and 70% by weight), a series of uniaxial compression and tensile tests have been performed and described in this paper. At the same time, through the Eco-Mechanical Index (EMI), ecological performances are evaluated on the basis of the measured mechanical properties. As a result, the application of UHP-FRCC in full-scale structures (e.g., composite concrete columns) is really convenient in the presence of HVFA, although the material properties (the compressive strength, in particular) show an opposite trend.

Original languageEnglish
Pages (from-to)249-256
Number of pages8
JournalRILEM Bookseries
Volume15
DOIs
Publication statusPublished - 2018 Jan 1

Keywords

  • Eco-Mechanical Index (EMI)
  • Ecological performances
  • High Volume Fly Ash (HVFA)
  • Mechanical properties
  • Ultra High Performance – Fiber Reinforced Cementitious Composites (UHP-FRCC)

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanics of Materials

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