首页|Influence of aggressive agents on properties of geopolymer concrete and corrosion behavior of steel in geopolymer concrete pore solution
Influence of aggressive agents on properties of geopolymer concrete and corrosion behavior of steel in geopolymer concrete pore solution
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NETL
NSTL
Springer Nature
Abstract The effect of aggressive agents such as chloride and sulfate admixed salt (NaCl, NaCl + Na2SO4, and NaCl + MgSO4) on compressive strength, ionic concentration (Ca2+, Na+, and K+ ions) of geopolymer concrete (GeoPC) pore solution, and microstructural characteristics of fly ash (FA), and fly ash-ground granulated blast furnace slag GeoPC were investigated in the present study. In addition, the effect of aggressive ions on the electrochemical behavior of steel specimen was investigated by half-cell potential, linear polarisation (LPR), and potentiodynamic polarisation (PDP) tests. The results exhibited that the GeoPC admixed with NaCl plus MgSO4 showed lower strength than other GeoPC mixes. Further, variation in ionic concentrations of pore solution are in line with formation of binding gels. Microstructural investigations of GeoPC showed that the mixtures added with chloride-sulfate salt showed lower formation of binding gels than chloride admixed GeoPC which were substantiated with the strength results. The LPR and PDP test results indicated that the corrosion resistance of steel specimen was higher in pore solution of GeoPC added with NaCl plus Na2SO4 than NaCl plus MgSO4, and followed by NaCl.
NETL
NSTL
Springer Nature
