Effect of fly ash on tensile properties of ultra-high performance fiber reinforced cementitious composites (UHP-FRCC)

Faiz Uddin Ahmed Shaikh, Tomoya Nishiwaki, Sukmin Kwon

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

This article presents and compare the tensile strain hardening behavior, compressive strength, energy absorption, and CO2 emission of environmental friendly ultrahigh performance fiber reinforced cementitious composites (UHP-FRCC) containing various fly ash contents as partial replacement of premix cement (consisted of 82% low heat cement and 18% silica fume). Six series of UHP-FRCC are considered in this study. The first two series are control series while the rest four series contain 20, 30, 40, and 50% fly ash as partial replacement of premix cement. A small amount of nano silica (2 wt.%) is also added to compensate the low early age strength properties of the fly ash based UHP-FRCC. Results show that fly ash contents of 30–40% exhibited better compressive strength, tensile strain hardening behavior, and energy absorption than the other fly ash contents in the UHP-FRCC. The UHP-FRCC containing 40% fly ash shows about 12, 14, 10, and 22% reduction in compressive strength, ultimate tensile strength, ultimate tensile strain, and energy absorption capacities, respectively, than the control, while its CO2 emission is about 35% lower than the control. The reported properties of UHP-FRCC containing 40% fly ash are still higher than other reported UHP-FRCC containing other SCMs as well as many reported UHP-FRCC containing no SCMs except the silica fume.

Original languageEnglish
Pages (from-to)357-371
Number of pages15
JournalJournal of Sustainable Cement-Based Materials
Volume7
Issue number6
DOIs
Publication statusPublished - 2018 Nov 2

Keywords

  • UHP-FRCC
  • class F fly ash
  • compressive strength
  • energy absorption
  • nano silica
  • silica fume
  • strain hardening

ASJC Scopus subject areas

  • Ceramics and Composites
  • Waste Management and Disposal

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