Natural pozzolan-and granulated blast furnace slag-based binary geopolymers


  • R. A. Robayo Universidad del Valle
  • R. Mejía de Gutiérrez Universidad del Valle
  • M. Gordillo Universidad Autónoma de Occidente



Alkaline-activated cement, Volcanic Pozzolan, Blast furnace slag, Compressive Strength, Characterization


This study describes the synthesis at ambient temperature (25±3 °C) of binary geopolymer systems based on natural volcanic pozzolan and granulated blast furnace slag. Na2SiO3 and NaOH were used as alkaline activators. The effects of the SiO2/Al2O3, Na2O/Al2O3 ratio and the amount of slag added (from 0 to 30%) on the reaction kinetics, compressive strength and microstructure of the final product were studied. To characterise the geopolymer pastes, techniques such as X-ray diffraction (XRD), infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used. The results indicate the possibility of obtaining a geopolymer cement with a compressive strength of up to 48.11 MPa after 28 days of curing at ambient temperature whose characteristics are comparable to those of commercial portland cement.


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How to Cite

Robayo, R. A., Mejía de Gutiérrez, R., & Gordillo, M. (2016). Natural pozzolan-and granulated blast furnace slag-based binary geopolymers. Materiales De Construcción, 66(321), e077.



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