Geopolymer concrete was obtained using a mixture of fly ash and slag as binder. It has been observed that the use of a self-compacting mix avoids segregation of aggregate particles and significantly improve mechanical strength at 28 days. Microstructural analysis by SEM shows a significant reduction in porosity in the interfacial transition zone for the self-compacting geopolymer concrete. The hydration products display a significant degree of compositional heterogeneity, with the Ca/Si ratio being close to unity in proximity to slag particles and decreasing as fly ash particles are approached. Practical applications of the geopolymer concrete will be discussed during the presentation.
Microstructural characterization of geopolymer concrete for industrial applications
SECCO, MICHELE;VALENTINI, LUCA;DALCONI, MARIA CHIARA;ARTIOLI, GILBERTO;
2016
Abstract
Geopolymer concrete was obtained using a mixture of fly ash and slag as binder. It has been observed that the use of a self-compacting mix avoids segregation of aggregate particles and significantly improve mechanical strength at 28 days. Microstructural analysis by SEM shows a significant reduction in porosity in the interfacial transition zone for the self-compacting geopolymer concrete. The hydration products display a significant degree of compositional heterogeneity, with the Ca/Si ratio being close to unity in proximity to slag particles and decreasing as fly ash particles are approached. Practical applications of the geopolymer concrete will be discussed during the presentation.
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