Effect of fly ash on tensile properties of ultra-high performance fiber reinforced cementitious composites (UHP-FRCC). Issue 6 (2nd November 2018)

• Record Type: Journal Article
• Authors: Shaikh, Faiz UddinAhmed; Nishiwaki, Tomoya; Kwon, Sukmin
• Is Part Of: Journal of sustainable cement-based materials. Volume 7:Issue 6(2018)
• Page Start: 357
• Page End: 371
• Publication Date: 2018-11-02
• Subjects: class F fly ash -- nano silica -- silica fume -- UHP-FRCC -- strain hardening -- energy absorption -- compressive strength; Cement -- Periodicals; Cement composites -- Periodicals; Cement; Cement composites; Periodicals; 620.135
• DOI: 10.1080/21650373.2018.1514672
• Languages: English
• ISSNs: 2165-0373

Abstract

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.