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This paper aims to investigate the effect of ferrochrome slag and silica fume in fly ash geopolymer concrete (GPC) exposed to acid, sulphate and chloride attack. Binder of this geopolymer concrete was fly ash activated with alkaline activators (Na2SiO3 and NaOH). GPC mixes were produced by mixing fly ash, river sand and crushed granite stone aggregates. Ferrochrome slag (FS) and silica fume (SF) was replaced natural coarse aggregate and fly ash respectively. The GPC specimens were immersed in magnesium sulphate (3%), sulphuric acid (3%) and sodium chloride (5%) solution for 28, 56 and 90 days. The compressive strength and weight loss were investigated. Sorptivity was studied with a regular interval of time. Rapid chloride permeability test was carried out to determine the current passed through the GPC specimens. Scanning electron microscope (SEM), X-ray diffraction (XRD), and Fourier transformed infrared spectroscopy (FTIR) analysis was carried out for the microstructural properties.
International Journal of Structural Engineering – Inderscience Publishers
Published: Jan 1, 2022
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