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http://dx.doi.org/10.12989/acc.2021.12.6.499

An experimental investigation on the mechanical properties of steel fiber reinforced geopolymer concrete  

Murali, Kallempudi (School of Civil Engineering, Vellore Institute of Technology)
Meena, T. (School of Civil Engineering, Vellore Institute of Technology)
Publication Information
Advances in concrete construction / v.12, no.6, 2021 , pp. 499-505 More about this Journal
Abstract
Geopolymer binders fascinate the attention of researchers as a replacement to cement binder in conventional concrete. One-ton production of cement releases one ton of carbon-dioxide in the atmosphere. In the replacement of cement by geopolymer material, there are two advantages: one is the reduction of CO2 in the atmosphere, second is the utilization of Fly ash and Ground granulated blast furnace slag (GGBFS) are by-products from coal and steel industries. This paper focuses on the mechanical properties of steel fiber reinforced geopolymer concrete. The framework considered in this research work is geopolymer source (Fly ash, GGBFS and crimped steel fibre) and alkaline activator which consists of NaOH and Na2SiO3 of molarity 8M. Here the Na2SiO3 / NaOH ratio was taken as 2.5. The variables considered in this experimental work include Binder content (360,420 and 450 kg/m3), the proportion of Fly ash and GGBS (70-30, 60-40 and 50-50) for three different grades of Geopolymer concrete (GPC) GPC 20, GPC 40 and GPC 60. The percentage of crimped steel fibres was varied as 0.1%, 0.2%, 0.3%, 0.4% and 0.5%. Generally, the inclusion of steel fibres increases the flexural and split tensile strength of Geopolymer concrete. The optimum dosage of steel fibres was found to be 0.4% (by volume fraction).
Keywords
crimped steel fiber; fly ash; GGBFS;
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